/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-examples/standard_strcpy_original-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:01:30,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:01:30,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:01:30,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:01:30,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:01:31,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:01:31,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:01:31,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:01:31,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:01:31,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:01:31,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:01:31,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:01:31,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:01:31,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:01:31,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:01:31,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:01:31,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:01:31,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:01:31,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:01:31,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:01:31,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:01:31,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:01:31,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:01:31,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:01:31,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:01:31,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:01:31,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:01:31,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:01:31,107 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 10:01:31,139 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:01:31,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:01:31,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:01:31,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:01:31,142 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:01:31,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:01:31,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:01:31,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:01:31,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:01:31,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:01:31,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:01:31,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:01:31,144 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:01:31,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:01:31,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:01:31,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:01:31,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:01:31,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:01:31,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:01:31,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:01:31,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:01:31,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:01:31,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:01:31,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:01:31,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:01:31,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:01:31,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:01:31,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:01:31,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:01:31,958 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:01:31,965 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:01:31,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-01-06 10:01:32,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c1fdacb6b/953f5d3a609b4ffb8df400a4e5d10694/FLAGcf03660c6 [2021-01-06 10:01:33,497 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:01:33,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-01-06 10:01:33,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c1fdacb6b/953f5d3a609b4ffb8df400a4e5d10694/FLAGcf03660c6 [2021-01-06 10:01:33,578 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c1fdacb6b/953f5d3a609b4ffb8df400a4e5d10694 [2021-01-06 10:01:33,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:01:33,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:01:33,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:01:33,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:01:33,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:01:33,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:01:33" (1/1) ... [2021-01-06 10:01:33,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a3feb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33, skipping insertion in model container [2021-01-06 10:01:33,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:01:33" (1/1) ... [2021-01-06 10:01:33,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:01:33,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:01:33,912 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-examples/standard_strcpy_original-2.i[896,909] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~src~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~dst~0,],[IdentifierExpression[~i~0,]]] 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: VariableLHS[~i~0,] [2021-01-06 10:01:33,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:01:33,940 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:01:33,956 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-examples/standard_strcpy_original-2.i[896,909] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#src~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#src~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#dst~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#dst~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,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:01:33,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:01:33,983 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:01:33,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33 WrapperNode [2021-01-06 10:01:33,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:01:33,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:01:33,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:01:33,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:01:33,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33" (1/1) ... [2021-01-06 10:01:34,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33" (1/1) ... [2021-01-06 10:01:34,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:01:34,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:01:34,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:01:34,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:01:34,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33" (1/1) ... [2021-01-06 10:01:34,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33" (1/1) ... [2021-01-06 10:01:34,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33" (1/1) ... [2021-01-06 10:01:34,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33" (1/1) ... [2021-01-06 10:01:34,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33" (1/1) ... [2021-01-06 10:01:34,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33" (1/1) ... [2021-01-06 10:01:34,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33" (1/1) ... [2021-01-06 10:01:34,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:01:34,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:01:34,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:01:34,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:01:34,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33" (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 10:01:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:01:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:01:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:01:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:01:34,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:01:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:01:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:01:34,571 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:01:34,572 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 10:01:34,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:01:34 BoogieIcfgContainer [2021-01-06 10:01:34,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:01:34,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:01:34,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:01:34,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:01:34,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:01:33" (1/3) ... [2021-01-06 10:01:34,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ecff1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:01:34, skipping insertion in model container [2021-01-06 10:01:34,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:33" (2/3) ... [2021-01-06 10:01:34,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ecff1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:01:34, skipping insertion in model container [2021-01-06 10:01:34,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:01:34" (3/3) ... [2021-01-06 10:01:34,589 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2021-01-06 10:01:34,597 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:01:34,603 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:01:34,624 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:01:34,677 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:01:34,677 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:01:34,677 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:01:34,677 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:01:34,677 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:01:34,678 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:01:34,678 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:01:34,678 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:01:34,699 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 10:01:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:01:34,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:34,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:34,714 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:34,724 INFO L82 PathProgramCache]: Analyzing trace with hash 112467144, now seen corresponding path program 1 times [2021-01-06 10:01:34,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:34,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323392963] [2021-01-06 10:01:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:35,008 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 10:01:35,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323392963] [2021-01-06 10:01:35,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:01:35,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:01:35,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358376197] [2021-01-06 10:01:35,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:01:35,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:35,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:01:35,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:01:35,043 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2021-01-06 10:01:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:35,067 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2021-01-06 10:01:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:01:35,069 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 10:01:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:35,092 INFO L225 Difference]: With dead ends: 33 [2021-01-06 10:01:35,095 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 10:01:35,100 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 10:01:35,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 10:01:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 10:01:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 10:01:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-01-06 10:01:35,147 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 10 [2021-01-06 10:01:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:35,147 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-01-06 10:01:35,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:01:35,148 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-01-06 10:01:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:01:35,149 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:35,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:35,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:01:35,150 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:35,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:35,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1877798305, now seen corresponding path program 1 times [2021-01-06 10:01:35,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:35,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916711382] [2021-01-06 10:01:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:35,292 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 10:01:35,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916711382] [2021-01-06 10:01:35,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:01:35,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:01:35,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927418477] [2021-01-06 10:01:35,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:01:35,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:01:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:01:35,297 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 3 states. [2021-01-06 10:01:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:35,318 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2021-01-06 10:01:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:01:35,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-01-06 10:01:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:35,320 INFO L225 Difference]: With dead ends: 26 [2021-01-06 10:01:35,320 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 10:01:35,322 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 10:01:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 10:01:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 10:01:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 10:01:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-01-06 10:01:35,328 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2021-01-06 10:01:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:35,328 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-01-06 10:01:35,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:01:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-01-06 10:01:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:01:35,329 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:35,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:35,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:01:35,330 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:35,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1363852218, now seen corresponding path program 1 times [2021-01-06 10:01:35,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:35,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116293018] [2021-01-06 10:01:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:35,405 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 10:01:35,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116293018] [2021-01-06 10:01:35,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721401885] [2021-01-06 10:01:35,406 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 10:01:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:35,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:01:35,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:35,617 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 10:01:35,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:35,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:01:35,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261179605] [2021-01-06 10:01:35,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:01:35,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:35,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:01:35,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:01:35,621 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 5 states. [2021-01-06 10:01:35,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:35,639 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-01-06 10:01:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:01:35,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 10:01:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:35,641 INFO L225 Difference]: With dead ends: 27 [2021-01-06 10:01:35,641 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 10:01:35,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 10:01:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 10:01:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 10:01:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 10:01:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 10:01:35,646 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 13 [2021-01-06 10:01:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:35,647 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 10:01:35,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:01:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 10:01:35,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:01:35,647 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:35,648 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:35,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:01:35,863 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:35,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1224196673, now seen corresponding path program 2 times [2021-01-06 10:01:35,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:35,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920785487] [2021-01-06 10:01:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:35,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920785487] [2021-01-06 10:01:35,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382899029] [2021-01-06 10:01:35,932 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 10:01:35,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:01:35,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:35,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:01:36,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:01:36,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:01:36,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-01-06 10:01:36,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113851279] [2021-01-06 10:01:36,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:01:36,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:36,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:01:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:01:36,139 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 7 states. [2021-01-06 10:01:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:36,323 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-01-06 10:01:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:01:36,323 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2021-01-06 10:01:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:36,326 INFO L225 Difference]: With dead ends: 41 [2021-01-06 10:01:36,326 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:01:36,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:01:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:01:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-01-06 10:01:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:01:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-01-06 10:01:36,342 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2021-01-06 10:01:36,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:36,342 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-01-06 10:01:36,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:01:36,343 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-01-06 10:01:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:01:36,344 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:36,345 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:36,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:36,573 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:36,574 INFO L82 PathProgramCache]: Analyzing trace with hash 414850047, now seen corresponding path program 1 times [2021-01-06 10:01:36,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:36,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695900136] [2021-01-06 10:01:36,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:01:36,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695900136] [2021-01-06 10:01:36,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:01:36,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:01:36,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711565044] [2021-01-06 10:01:36,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:01:36,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:36,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:01:36,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:01:36,652 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2021-01-06 10:01:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:36,697 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-01-06 10:01:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:01:36,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-01-06 10:01:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:36,699 INFO L225 Difference]: With dead ends: 37 [2021-01-06 10:01:36,699 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:01:36,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:01:36,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:01:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2021-01-06 10:01:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:01:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-01-06 10:01:36,705 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2021-01-06 10:01:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:36,705 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-01-06 10:01:36,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:01:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-01-06 10:01:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:01:36,706 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:36,707 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:36,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 10:01:36,707 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:36,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1444694637, now seen corresponding path program 1 times [2021-01-06 10:01:36,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:36,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131986586] [2021-01-06 10:01:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:01:36,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131986586] [2021-01-06 10:01:36,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941997] [2021-01-06 10:01:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:36,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:01:36,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:01:36,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:36,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:01:36,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99187426] [2021-01-06 10:01:36,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:01:36,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:36,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:01:36,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:01:36,864 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2021-01-06 10:01:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:36,882 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-01-06 10:01:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:01:36,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 10:01:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:36,883 INFO L225 Difference]: With dead ends: 34 [2021-01-06 10:01:36,883 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 10:01:36,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 10:01:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 10:01:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 10:01:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 10:01:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-01-06 10:01:36,889 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2021-01-06 10:01:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:36,890 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-01-06 10:01:36,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:01:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-01-06 10:01:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 10:01:36,891 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:36,891 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:37,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:37,106 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:37,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1114684942, now seen corresponding path program 2 times [2021-01-06 10:01:37,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:37,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724883287] [2021-01-06 10:01:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:01:37,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724883287] [2021-01-06 10:01:37,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679012922] [2021-01-06 10:01:37,175 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 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 10:01:37,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:37,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:37,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:01:37,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:01:37,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:37,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:01:37,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859319167] [2021-01-06 10:01:37,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:01:37,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:01:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:01:37,271 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 7 states. [2021-01-06 10:01:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:37,296 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-01-06 10:01:37,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:01:37,298 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2021-01-06 10:01:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:37,298 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:01:37,299 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 10:01:37,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 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 10:01:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 10:01:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 10:01:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 10:01:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-01-06 10:01:37,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2021-01-06 10:01:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:37,308 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-01-06 10:01:37,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:01:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-01-06 10:01:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:01:37,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:37,310 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:37,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:37,524 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:37,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1148926733, now seen corresponding path program 3 times [2021-01-06 10:01:37,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:37,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53752258] [2021-01-06 10:01:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:01:37,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53752258] [2021-01-06 10:01:37,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406115422] [2021-01-06 10:01:37,633 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 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 10:01:37,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:01:37,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:01:37,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:37,742 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 10:01:37,745 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:01:37,753 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:01:37,755 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:01:37,756 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 10:01:37,840 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-01-06 10:01:37,843 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:01:37,851 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:01:37,852 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:01:37,853 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2021-01-06 10:01:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:01:37,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:37,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 10:01:37,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482683265] [2021-01-06 10:01:37,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:01:37,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:37,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:01:37,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:01:37,973 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 11 states. [2021-01-06 10:01:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:38,290 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-01-06 10:01:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:01:38,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2021-01-06 10:01:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:38,292 INFO L225 Difference]: With dead ends: 44 [2021-01-06 10:01:38,292 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:01:38,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:01:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:01:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-01-06 10:01:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:01:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-01-06 10:01:38,299 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 19 [2021-01-06 10:01:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:38,299 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-01-06 10:01:38,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:01:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-01-06 10:01:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:01:38,300 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:38,301 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:38,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:38,517 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:38,518 INFO L82 PathProgramCache]: Analyzing trace with hash 270279746, now seen corresponding path program 1 times [2021-01-06 10:01:38,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:38,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210700440] [2021-01-06 10:01:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:01:38,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210700440] [2021-01-06 10:01:38,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80715436] [2021-01-06 10:01:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:01:38,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:01:38,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:38,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:01:38,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354818378] [2021-01-06 10:01:38,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:01:38,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:38,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:01:38,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:01:38,708 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 9 states. [2021-01-06 10:01:38,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:38,727 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-01-06 10:01:38,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:01:38,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2021-01-06 10:01:38,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:38,729 INFO L225 Difference]: With dead ends: 45 [2021-01-06 10:01:38,729 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:01:38,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 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 10:01:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:01:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 10:01:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:01:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-01-06 10:01:38,734 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2021-01-06 10:01:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:38,734 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-01-06 10:01:38,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:01:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-01-06 10:01:38,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:01:38,735 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:38,736 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:38,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:38,949 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash 738361789, now seen corresponding path program 2 times [2021-01-06 10:01:38,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:38,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136053161] [2021-01-06 10:01:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:01:39,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136053161] [2021-01-06 10:01:39,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579723135] [2021-01-06 10:01:39,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:39,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:39,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:39,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:01:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:01:39,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:39,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:01:39,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693538033] [2021-01-06 10:01:39,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:01:39,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:39,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:01:39,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:01:39,251 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2021-01-06 10:01:39,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:39,293 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-01-06 10:01:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:01:39,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2021-01-06 10:01:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:39,296 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:01:39,296 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:01:39,299 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 10:01:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:01:39,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 10:01:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:01:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-01-06 10:01:39,314 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 26 [2021-01-06 10:01:39,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:39,315 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-01-06 10:01:39,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:01:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-01-06 10:01:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:01:39,316 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:39,316 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:39,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:01:39,526 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:39,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:39,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1930964062, now seen corresponding path program 3 times [2021-01-06 10:01:39,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:39,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418333505] [2021-01-06 10:01:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:01:39,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418333505] [2021-01-06 10:01:39,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813183089] [2021-01-06 10:01:39,632 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 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 10:01:39,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:01:39,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:39,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:01:39,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 10:01:39,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:39,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-01-06 10:01:39,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092332295] [2021-01-06 10:01:39,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:01:39,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:39,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:01:39,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:01:39,961 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 17 states. [2021-01-06 10:01:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:40,411 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-01-06 10:01:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:01:40,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2021-01-06 10:01:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:40,415 INFO L225 Difference]: With dead ends: 73 [2021-01-06 10:01:40,415 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 10:01:40,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:01:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 10:01:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2021-01-06 10:01:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:01:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-01-06 10:01:40,441 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2021-01-06 10:01:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:40,442 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-01-06 10:01:40,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:01:40,442 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-01-06 10:01:40,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:01:40,443 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:40,443 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:40,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:01:40,652 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:40,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:40,653 INFO L82 PathProgramCache]: Analyzing trace with hash 632474463, now seen corresponding path program 1 times [2021-01-06 10:01:40,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:40,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340011792] [2021-01-06 10:01:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 10:01:40,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340011792] [2021-01-06 10:01:40,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410549176] [2021-01-06 10:01:40,712 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 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 10:01:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:40,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:01:40,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:01:40,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:40,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11] total 14 [2021-01-06 10:01:40,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810988351] [2021-01-06 10:01:40,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:01:40,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:01:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:01:40,991 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 14 states. [2021-01-06 10:01:41,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:41,238 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-01-06 10:01:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:01:41,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2021-01-06 10:01:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:41,240 INFO L225 Difference]: With dead ends: 62 [2021-01-06 10:01:41,240 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:01:41,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:01:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:01:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-01-06 10:01:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:01:41,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-01-06 10:01:41,247 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2021-01-06 10:01:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:41,248 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-01-06 10:01:41,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:01:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-01-06 10:01:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:01:41,249 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:41,249 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:41,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:41,465 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:41,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1845646038, now seen corresponding path program 4 times [2021-01-06 10:01:41,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:41,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455853207] [2021-01-06 10:01:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:01:41,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455853207] [2021-01-06 10:01:41,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126274205] [2021-01-06 10:01:41,633 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 10:01:41,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:41,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:41,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:01:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:01:41,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:41,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:01:41,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212118486] [2021-01-06 10:01:41,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:01:41,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:41,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:01:41,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:01:41,784 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 13 states. [2021-01-06 10:01:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:41,810 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-01-06 10:01:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:01:41,810 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2021-01-06 10:01:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:41,811 INFO L225 Difference]: With dead ends: 55 [2021-01-06 10:01:41,811 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 10:01:41,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 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 10:01:41,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 10:01:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-01-06 10:01:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:01:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-01-06 10:01:41,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 32 [2021-01-06 10:01:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:41,818 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-01-06 10:01:41,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:01:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-01-06 10:01:41,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:01:41,819 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:41,819 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:42,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:42,035 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:42,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:42,036 INFO L82 PathProgramCache]: Analyzing trace with hash 500514639, now seen corresponding path program 5 times [2021-01-06 10:01:42,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:42,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899103788] [2021-01-06 10:01:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:01:42,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899103788] [2021-01-06 10:01:42,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076641610] [2021-01-06 10:01:42,248 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 10:01:42,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:01:42,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:42,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:01:42,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:01:42,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:42,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:01:42,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862259262] [2021-01-06 10:01:42,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:01:42,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:42,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:01:42,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:01:42,550 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 14 states. [2021-01-06 10:01:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:42,580 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-01-06 10:01:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:01:42,581 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2021-01-06 10:01:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:42,582 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:01:42,582 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 10:01:42,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:01:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 10:01:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 10:01:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 10:01:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-01-06 10:01:42,589 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 33 [2021-01-06 10:01:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:42,589 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-01-06 10:01:42,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:01:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-01-06 10:01:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 10:01:42,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:42,591 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:42,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:01:42,806 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash 217051594, now seen corresponding path program 6 times [2021-01-06 10:01:42,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:42,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960343537] [2021-01-06 10:01:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:01:42,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960343537] [2021-01-06 10:01:42,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234517116] [2021-01-06 10:01:42,965 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 10:01:43,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:01:43,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:43,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:01:43,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:43,098 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 10:01:43,101 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:01:43,107 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:01:43,108 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:01:43,108 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2021-01-06 10:01:43,198 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-01-06 10:01:43,200 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:01:43,208 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:01:43,209 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:01:43,209 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-01-06 10:01:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 10:01:43,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:43,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-01-06 10:01:43,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516234619] [2021-01-06 10:01:43,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:01:43,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:43,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:01:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:01:43,388 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 21 states. [2021-01-06 10:01:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:43,962 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-01-06 10:01:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:01:43,962 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2021-01-06 10:01:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:43,963 INFO L225 Difference]: With dead ends: 66 [2021-01-06 10:01:43,963 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 10:01:43,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:01:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 10:01:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-01-06 10:01:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 10:01:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-01-06 10:01:43,969 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2021-01-06 10:01:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:43,970 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-01-06 10:01:43,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:01:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-01-06 10:01:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 10:01:43,971 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:43,971 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:44,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:01:44,184 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1884321567, now seen corresponding path program 7 times [2021-01-06 10:01:44,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:44,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865002842] [2021-01-06 10:01:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:01:44,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865002842] [2021-01-06 10:01:44,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340025072] [2021-01-06 10:01:44,339 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 10:01:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:44,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:01:44,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:01:44,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:44,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:01:44,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664643979] [2021-01-06 10:01:44,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:01:44,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:01:44,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:01:44,462 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 16 states. [2021-01-06 10:01:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:44,487 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-01-06 10:01:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:01:44,487 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2021-01-06 10:01:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:44,488 INFO L225 Difference]: With dead ends: 68 [2021-01-06 10:01:44,488 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 10:01:44,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 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 10:01:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 10:01:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 10:01:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 10:01:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-01-06 10:01:44,494 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 40 [2021-01-06 10:01:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:44,508 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-01-06 10:01:44,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:01:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-01-06 10:01:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:01:44,510 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:44,511 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:44,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:01:44,712 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:44,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash -910612986, now seen corresponding path program 8 times [2021-01-06 10:01:44,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:44,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808902995] [2021-01-06 10:01:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:01:44,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808902995] [2021-01-06 10:01:44,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198897477] [2021-01-06 10:01:44,905 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 10:01:44,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:44,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:44,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:01:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:01:45,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:45,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:01:45,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819822684] [2021-01-06 10:01:45,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:01:45,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:45,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:01:45,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:01:45,048 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 17 states. [2021-01-06 10:01:45,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:45,081 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2021-01-06 10:01:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:01:45,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2021-01-06 10:01:45,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:45,082 INFO L225 Difference]: With dead ends: 69 [2021-01-06 10:01:45,082 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 10:01:45,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 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 10:01:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 10:01:45,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 10:01:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 10:01:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-01-06 10:01:45,089 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 41 [2021-01-06 10:01:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:45,090 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-01-06 10:01:45,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:01:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-01-06 10:01:45,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:01:45,091 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:45,091 INFO L422 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:45,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:45,307 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:45,308 INFO L82 PathProgramCache]: Analyzing trace with hash -790418047, now seen corresponding path program 9 times [2021-01-06 10:01:45,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:45,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825159121] [2021-01-06 10:01:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:01:45,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825159121] [2021-01-06 10:01:45,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131349018] [2021-01-06 10:01:45,501 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 10:01:45,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:01:45,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:45,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:01:45,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 10:01:45,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:45,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2021-01-06 10:01:45,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168364400] [2021-01-06 10:01:45,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:01:45,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:45,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:01:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:01:45,857 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 26 states. [2021-01-06 10:01:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:46,618 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2021-01-06 10:01:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:01:46,619 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2021-01-06 10:01:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:46,620 INFO L225 Difference]: With dead ends: 106 [2021-01-06 10:01:46,620 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:01:46,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=440, Invalid=1366, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:01:46,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:01:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2021-01-06 10:01:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 10:01:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-01-06 10:01:46,627 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2021-01-06 10:01:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:46,627 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-01-06 10:01:46,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:01:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-01-06 10:01:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 10:01:46,628 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:46,628 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:46,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:01:46,844 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:46,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash 941480356, now seen corresponding path program 2 times [2021-01-06 10:01:46,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:46,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800565234] [2021-01-06 10:01:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:01:47,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800565234] [2021-01-06 10:01:47,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814292909] [2021-01-06 10:01:47,059 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 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 10:01:47,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:47,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:47,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:01:47,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:01:47,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:47,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:01:47,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345648269] [2021-01-06 10:01:47,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:01:47,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:47,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:01:47,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:01:47,236 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 19 states. [2021-01-06 10:01:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:47,271 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-01-06 10:01:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:01:47,271 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2021-01-06 10:01:47,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:47,272 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:01:47,272 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 10:01:47,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 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 10:01:47,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 10:01:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 10:01:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:01:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-01-06 10:01:47,278 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 43 [2021-01-06 10:01:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:47,278 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-01-06 10:01:47,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:01:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-01-06 10:01:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 10:01:47,280 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:47,280 INFO L422 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:47,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:47,494 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:47,495 INFO L82 PathProgramCache]: Analyzing trace with hash 484699743, now seen corresponding path program 3 times [2021-01-06 10:01:47,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:47,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872020741] [2021-01-06 10:01:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:01:47,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872020741] [2021-01-06 10:01:47,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981990255] [2021-01-06 10:01:47,715 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 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 10:01:47,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:01:47,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:47,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:01:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-01-06 10:01:47,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:47,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6] total 23 [2021-01-06 10:01:47,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844313223] [2021-01-06 10:01:47,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:01:47,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:47,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:01:47,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:01:47,941 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 23 states. [2021-01-06 10:01:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:48,473 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-01-06 10:01:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:01:48,473 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2021-01-06 10:01:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:48,474 INFO L225 Difference]: With dead ends: 86 [2021-01-06 10:01:48,475 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 10:01:48,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1232, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:01:48,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 10:01:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2021-01-06 10:01:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 10:01:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-01-06 10:01:48,481 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2021-01-06 10:01:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:48,481 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-01-06 10:01:48,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:01:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-01-06 10:01:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 10:01:48,482 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:48,482 INFO L422 BasicCegarLoop]: trace histogram [17, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:48,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:48,691 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:48,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:48,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1789215762, now seen corresponding path program 10 times [2021-01-06 10:01:48,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:48,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014521506] [2021-01-06 10:01:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:01:48,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014521506] [2021-01-06 10:01:48,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314595180] [2021-01-06 10:01:48,938 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 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 10:01:49,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:49,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:49,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:01:49,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:01:49,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:49,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 10:01:49,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117574281] [2021-01-06 10:01:49,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:01:49,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:49,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:01:49,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:01:49,145 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 21 states. [2021-01-06 10:01:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:49,179 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-01-06 10:01:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:01:49,180 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2021-01-06 10:01:49,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:49,181 INFO L225 Difference]: With dead ends: 79 [2021-01-06 10:01:49,181 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 10:01:49,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:01:49,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 10:01:49,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 10:01:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 10:01:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-01-06 10:01:49,187 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 48 [2021-01-06 10:01:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:49,187 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-01-06 10:01:49,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:01:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-01-06 10:01:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:01:49,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:49,188 INFO L422 BasicCegarLoop]: trace histogram [18, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:49,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:01:49,402 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:49,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:49,402 INFO L82 PathProgramCache]: Analyzing trace with hash 475751443, now seen corresponding path program 11 times [2021-01-06 10:01:49,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:49,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051972861] [2021-01-06 10:01:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:01:49,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051972861] [2021-01-06 10:01:49,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813127826] [2021-01-06 10:01:49,683 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 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 10:01:50,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 10:01:50,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:01:50,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:01:50,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:50,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:01:50,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712213973] [2021-01-06 10:01:50,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:01:50,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:01:50,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:01:50,436 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 22 states. [2021-01-06 10:01:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:50,473 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-01-06 10:01:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:01:50,475 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2021-01-06 10:01:50,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:50,476 INFO L225 Difference]: With dead ends: 80 [2021-01-06 10:01:50,476 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:01:50,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 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 10:01:50,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:01:50,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 10:01:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 10:01:50,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-01-06 10:01:50,482 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 49 [2021-01-06 10:01:50,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:50,482 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-01-06 10:01:50,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:01:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-01-06 10:01:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 10:01:50,483 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:50,483 INFO L422 BasicCegarLoop]: trace histogram [19, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:50,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:50,696 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:50,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1970258062, now seen corresponding path program 12 times [2021-01-06 10:01:50,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:50,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602799179] [2021-01-06 10:01:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:01:51,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602799179] [2021-01-06 10:01:51,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535931325] [2021-01-06 10:01:51,044 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 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 10:01:51,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:01:51,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:51,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:01:51,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:51,341 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 10:01:51,342 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:01:51,352 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:01:51,353 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:01:51,353 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 10:01:51,461 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-01-06 10:01:51,464 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:01:51,474 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:01:51,475 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:01:51,475 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-01-06 10:01:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-01-06 10:01:51,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:51,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2021-01-06 10:01:51,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951610016] [2021-01-06 10:01:51,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:01:51,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:51,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:01:51,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:01:51,685 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 30 states. [2021-01-06 10:01:52,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:52,928 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2021-01-06 10:01:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 10:01:52,928 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 50 [2021-01-06 10:01:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:52,929 INFO L225 Difference]: With dead ends: 90 [2021-01-06 10:01:52,929 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 10:01:52,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=724, Invalid=1928, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:01:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 10:01:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2021-01-06 10:01:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 10:01:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-01-06 10:01:52,935 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2021-01-06 10:01:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:52,935 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-01-06 10:01:52,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:01:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-01-06 10:01:52,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:01:52,936 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:52,936 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:53,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:01:53,151 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:53,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1578598755, now seen corresponding path program 13 times [2021-01-06 10:01:53,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:53,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101106827] [2021-01-06 10:01:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:01:53,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101106827] [2021-01-06 10:01:53,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549444993] [2021-01-06 10:01:53,517 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 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 10:01:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:53,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:01:53,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:01:53,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:53,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 10:01:53,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120115338] [2021-01-06 10:01:53,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:01:53,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:53,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:01:53,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:01:53,701 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 24 states. [2021-01-06 10:01:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:53,729 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2021-01-06 10:01:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 10:01:53,729 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2021-01-06 10:01:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:53,730 INFO L225 Difference]: With dead ends: 92 [2021-01-06 10:01:53,730 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 10:01:53,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:01:53,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 10:01:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-01-06 10:01:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 10:01:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-01-06 10:01:53,735 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 56 [2021-01-06 10:01:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:53,736 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-01-06 10:01:53,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:01:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-01-06 10:01:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 10:01:53,736 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:53,737 INFO L422 BasicCegarLoop]: trace histogram [21, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:53,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:01:53,951 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:53,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2141532610, now seen corresponding path program 14 times [2021-01-06 10:01:53,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:53,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977026315] [2021-01-06 10:01:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:01:54,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977026315] [2021-01-06 10:01:54,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631850402] [2021-01-06 10:01:54,277 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 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 10:01:54,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:54,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:54,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:01:54,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:01:54,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:54,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 10:01:54,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808166730] [2021-01-06 10:01:54,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:01:54,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:54,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:01:54,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:01:54,442 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 25 states. [2021-01-06 10:01:54,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:54,477 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2021-01-06 10:01:54,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:01:54,478 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2021-01-06 10:01:54,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:54,478 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:01:54,478 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 10:01:54,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:01:54,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 10:01:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-06 10:01:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:01:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-01-06 10:01:54,484 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 57 [2021-01-06 10:01:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:54,484 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-01-06 10:01:54,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:01:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-01-06 10:01:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:01:54,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:54,485 INFO L422 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:54,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:54,699 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:54,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1501487933, now seen corresponding path program 15 times [2021-01-06 10:01:54,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:54,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250350535] [2021-01-06 10:01:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:01:55,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250350535] [2021-01-06 10:01:55,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739310979] [2021-01-06 10:01:55,102 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 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 10:01:55,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:01:55,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:55,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:01:55,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-01-06 10:01:55,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:55,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2021-01-06 10:01:55,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209022661] [2021-01-06 10:01:55,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:01:55,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:55,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:01:55,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=927, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:01:55,612 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 36 states. [2021-01-06 10:01:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:56,772 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-01-06 10:01:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 10:01:56,772 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 58 [2021-01-06 10:01:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:56,773 INFO L225 Difference]: With dead ends: 126 [2021-01-06 10:01:56,773 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 10:01:56,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=935, Invalid=2605, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 10:01:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 10:01:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2021-01-06 10:01:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:01:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2021-01-06 10:01:56,780 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 58 [2021-01-06 10:01:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:56,780 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2021-01-06 10:01:56,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:01:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2021-01-06 10:01:56,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:01:56,780 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:56,781 INFO L422 BasicCegarLoop]: trace histogram [23, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:56,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:01:56,995 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:56,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1329501092, now seen corresponding path program 4 times [2021-01-06 10:01:56,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:56,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727026158] [2021-01-06 10:01:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:01:57,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727026158] [2021-01-06 10:01:57,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071586897] [2021-01-06 10:01:57,407 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 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 10:01:57,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:57,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:57,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:01:57,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-01-06 10:01:57,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:57,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 7] total 31 [2021-01-06 10:01:57,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856942883] [2021-01-06 10:01:57,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:01:57,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:57,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:01:57,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:01:57,651 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 31 states. [2021-01-06 10:01:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:58,471 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2021-01-06 10:01:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:01:58,471 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 59 [2021-01-06 10:01:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:58,472 INFO L225 Difference]: With dead ends: 109 [2021-01-06 10:01:58,472 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 10:01:58,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1089, Invalid=2333, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 10:01:58,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 10:01:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2021-01-06 10:01:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:01:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-01-06 10:01:58,483 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 59 [2021-01-06 10:01:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:58,483 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-01-06 10:01:58,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:01:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-01-06 10:01:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:01:58,484 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:58,484 INFO L422 BasicCegarLoop]: trace histogram [24, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:58,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:58,699 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:58,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:58,700 INFO L82 PathProgramCache]: Analyzing trace with hash 510684015, now seen corresponding path program 16 times [2021-01-06 10:01:58,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:58,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282543739] [2021-01-06 10:01:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:01:59,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282543739] [2021-01-06 10:01:59,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270884630] [2021-01-06 10:01:59,163 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 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 10:01:59,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:59,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:59,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:01:59,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:01:59,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:59,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:01:59,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677704463] [2021-01-06 10:01:59,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:01:59,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:59,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:01:59,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:01:59,346 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 28 states. [2021-01-06 10:01:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:59,387 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2021-01-06 10:01:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:01:59,387 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2021-01-06 10:01:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:59,388 INFO L225 Difference]: With dead ends: 102 [2021-01-06 10:01:59,388 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 10:01:59,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 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 10:01:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 10:01:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-01-06 10:01:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:01:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-01-06 10:01:59,394 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 63 [2021-01-06 10:01:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:59,394 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-01-06 10:01:59,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:01:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-01-06 10:01:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 10:01:59,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:59,395 INFO L422 BasicCegarLoop]: trace histogram [25, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:59,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:01:59,611 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:59,611 INFO L82 PathProgramCache]: Analyzing trace with hash 186635434, now seen corresponding path program 17 times [2021-01-06 10:01:59,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:59,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805791468] [2021-01-06 10:01:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:02:00,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805791468] [2021-01-06 10:02:00,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81563075] [2021-01-06 10:02:00,085 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 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 10:02:06,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-01-06 10:02:06,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:06,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:02:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:02:06,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:06,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:02:06,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932033255] [2021-01-06 10:02:06,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:02:06,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:06,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:02:06,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:02:06,286 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 29 states. [2021-01-06 10:02:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:06,330 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2021-01-06 10:02:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:02:06,331 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2021-01-06 10:02:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:06,332 INFO L225 Difference]: With dead ends: 103 [2021-01-06 10:02:06,332 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:02:06,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 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 10:02:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:02:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-01-06 10:02:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:02:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-01-06 10:02:06,337 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 64 [2021-01-06 10:02:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:06,337 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-01-06 10:02:06,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:02:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-01-06 10:02:06,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:02:06,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:06,338 INFO L422 BasicCegarLoop]: trace histogram [26, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:06,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:02:06,539 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:06,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1268935985, now seen corresponding path program 18 times [2021-01-06 10:02:06,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:06,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734195316] [2021-01-06 10:02:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:02:07,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734195316] [2021-01-06 10:02:07,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083527495] [2021-01-06 10:02:07,029 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 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 [2021-01-06 10:02:07,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:02:07,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:07,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:02:07,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:07,695 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 10:02:07,698 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:02:07,707 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:02:07,708 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:02:07,708 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 10:02:07,875 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-01-06 10:02:07,876 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:02:07,885 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:02:07,886 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:02:07,886 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-01-06 10:02:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-01-06 10:02:08,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:08,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2021-01-06 10:02:08,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335670535] [2021-01-06 10:02:08,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:02:08,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:08,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:02:08,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1121, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:02:08,274 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 40 states. [2021-01-06 10:02:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:10,115 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2021-01-06 10:02:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:02:10,116 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 65 [2021-01-06 10:02:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:10,120 INFO L225 Difference]: With dead ends: 113 [2021-01-06 10:02:10,120 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 10:02:10,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1268, Invalid=3562, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 10:02:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 10:02:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2021-01-06 10:02:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:02:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-01-06 10:02:10,128 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 65 [2021-01-06 10:02:10,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:10,128 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-01-06 10:02:10,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:02:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-01-06 10:02:10,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:02:10,129 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:10,129 INFO L422 BasicCegarLoop]: trace histogram [27, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:10,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:02:10,344 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1569134810, now seen corresponding path program 19 times [2021-01-06 10:02:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:10,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483889239] [2021-01-06 10:02:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-01-06 10:02:10,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483889239] [2021-01-06 10:02:10,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568495175] [2021-01-06 10:02:10,938 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:02:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:11,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:02:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-01-06 10:02:11,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:11,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 10:02:11,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70865459] [2021-01-06 10:02:11,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:02:11,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:11,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:02:11,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:02:11,138 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 31 states. [2021-01-06 10:02:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:11,190 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2021-01-06 10:02:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:02:11,190 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2021-01-06 10:02:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:11,191 INFO L225 Difference]: With dead ends: 115 [2021-01-06 10:02:11,191 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 10:02:11,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:02:11,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 10:02:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-01-06 10:02:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 10:02:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-01-06 10:02:11,197 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 71 [2021-01-06 10:02:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:11,197 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-01-06 10:02:11,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:02:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-01-06 10:02:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 10:02:11,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:11,198 INFO L422 BasicCegarLoop]: trace histogram [28, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:11,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:02:11,411 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:11,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1384848031, now seen corresponding path program 20 times [2021-01-06 10:02:11,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:11,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202208252] [2021-01-06 10:02:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-01-06 10:02:12,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202208252] [2021-01-06 10:02:12,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269914248] [2021-01-06 10:02:12,047 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:02:12,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:02:12,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:12,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 10:02:12,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-01-06 10:02:12,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:12,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 10:02:12,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790528717] [2021-01-06 10:02:12,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:02:12,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:12,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:02:12,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:02:12,260 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 32 states. [2021-01-06 10:02:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:12,316 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2021-01-06 10:02:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 10:02:12,317 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2021-01-06 10:02:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:12,318 INFO L225 Difference]: With dead ends: 116 [2021-01-06 10:02:12,318 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 10:02:12,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:02:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 10:02:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-01-06 10:02:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 10:02:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-01-06 10:02:12,324 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 72 [2021-01-06 10:02:12,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:12,324 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-01-06 10:02:12,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:02:12,324 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-01-06 10:02:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:02:12,325 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:12,325 INFO L422 BasicCegarLoop]: trace histogram [29, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:12,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 10:02:12,536 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash 33074822, now seen corresponding path program 21 times [2021-01-06 10:02:12,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:12,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555090082] [2021-01-06 10:02:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-01-06 10:02:13,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555090082] [2021-01-06 10:02:13,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488967875] [2021-01-06 10:02:13,202 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:02:13,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:02:13,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:13,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 10:02:13,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-01-06 10:02:13,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:13,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 15] total 45 [2021-01-06 10:02:13,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854051221] [2021-01-06 10:02:13,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 10:02:13,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:13,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 10:02:13,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:02:13,953 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 45 states. [2021-01-06 10:02:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:16,032 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2021-01-06 10:02:16,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:02:16,032 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 73 [2021-01-06 10:02:16,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:16,033 INFO L225 Difference]: With dead ends: 173 [2021-01-06 10:02:16,033 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 10:02:16,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1532, Invalid=4320, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 10:02:16,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 10:02:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2021-01-06 10:02:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 10:02:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-01-06 10:02:16,039 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 73 [2021-01-06 10:02:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:16,040 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-01-06 10:02:16,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 10:02:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-01-06 10:02:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 10:02:16,041 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:16,041 INFO L422 BasicCegarLoop]: trace histogram [30, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:16,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:02:16,248 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:16,248 INFO L82 PathProgramCache]: Analyzing trace with hash 529537215, now seen corresponding path program 5 times [2021-01-06 10:02:16,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:16,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997156726] [2021-01-06 10:02:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-01-06 10:02:16,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997156726] [2021-01-06 10:02:16,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685619060] [2021-01-06 10:02:16,926 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:02:29,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-01-06 10:02:29,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:02:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2021-01-06 10:02:29,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:29,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 8] total 39 [2021-01-06 10:02:29,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445136599] [2021-01-06 10:02:29,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 10:02:29,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:29,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 10:02:29,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=932, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:02:29,663 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 39 states. [2021-01-06 10:02:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:30,875 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2021-01-06 10:02:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 10:02:30,876 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 74 [2021-01-06 10:02:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:30,876 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:02:30,876 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 10:02:30,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1768, Invalid=3782, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 10:02:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 10:02:30,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-01-06 10:02:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 10:02:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-01-06 10:02:30,883 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 74 [2021-01-06 10:02:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:30,884 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-01-06 10:02:30,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 10:02:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-01-06 10:02:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 10:02:30,885 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:30,885 INFO L422 BasicCegarLoop]: trace histogram [31, 6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:31,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 10:02:31,094 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:31,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:31,095 INFO L82 PathProgramCache]: Analyzing trace with hash -328060466, now seen corresponding path program 22 times [2021-01-06 10:02:31,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:31,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892632218] [2021-01-06 10:02:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:02:31,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892632218] [2021-01-06 10:02:31,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226363084] [2021-01-06 10:02:31,858 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:02:32,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:02:32,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:32,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:02:32,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:02:32,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:32,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 10:02:32,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109427379] [2021-01-06 10:02:32,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:02:32,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:32,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:02:32,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:02:32,159 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 35 states. [2021-01-06 10:02:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:32,224 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2021-01-06 10:02:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:02:32,225 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2021-01-06 10:02:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:32,226 INFO L225 Difference]: With dead ends: 125 [2021-01-06 10:02:32,226 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 10:02:32,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:02:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 10:02:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-01-06 10:02:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 10:02:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-01-06 10:02:32,232 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 78 [2021-01-06 10:02:32,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:32,233 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-01-06 10:02:32,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:02:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-01-06 10:02:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:02:32,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:32,234 INFO L422 BasicCegarLoop]: trace histogram [32, 6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:32,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:02:32,448 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:32,449 INFO L82 PathProgramCache]: Analyzing trace with hash -58602701, now seen corresponding path program 23 times [2021-01-06 10:02:32,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:32,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479575390] [2021-01-06 10:02:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:02:33,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479575390] [2021-01-06 10:02:33,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019150201] [2021-01-06 10:02:33,222 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:02:58,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 10:02:58,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 10:02:58,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:02:58,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:58,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 10:02:58,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305267573] [2021-01-06 10:02:58,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:02:58,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:58,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:02:58,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:02:58,640 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 36 states. [2021-01-06 10:02:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:58,700 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2021-01-06 10:02:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 10:02:58,700 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2021-01-06 10:02:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:58,701 INFO L225 Difference]: With dead ends: 126 [2021-01-06 10:02:58,701 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 10:02:58,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:02:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 10:02:58,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 10:02:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 10:02:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-01-06 10:02:58,707 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 79 [2021-01-06 10:02:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:58,708 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-01-06 10:02:58,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:02:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-01-06 10:02:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 10:02:58,708 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:58,709 INFO L422 BasicCegarLoop]: trace histogram [33, 6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:58,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 10:02:58,923 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:58,924 INFO L82 PathProgramCache]: Analyzing trace with hash -295346578, now seen corresponding path program 24 times [2021-01-06 10:02:58,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:58,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794359936] [2021-01-06 10:02:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:02:59,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794359936] [2021-01-06 10:02:59,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999886792] [2021-01-06 10:02:59,753 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:01,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 10:03:01,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:01,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 10:03:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:01,245 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 10:03:01,246 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:03:01,254 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:03:01,255 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:03:01,255 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 10:03:01,521 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-01-06 10:03:01,522 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:03:01,531 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:03:01,532 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:03:01,532 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-01-06 10:03:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-01-06 10:03:01,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:01,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 14] total 48 [2021-01-06 10:03:01,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412891128] [2021-01-06 10:03:01,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 10:03:01,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:01,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 10:03:01,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=1592, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:03:01,972 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 48 states. [2021-01-06 10:03:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:04,327 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2021-01-06 10:03:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 10:03:04,328 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 80 [2021-01-06 10:03:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:04,329 INFO L225 Difference]: With dead ends: 136 [2021-01-06 10:03:04,329 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 10:03:04,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1933, Invalid=5039, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 10:03:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 10:03:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-01-06 10:03:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 10:03:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2021-01-06 10:03:04,336 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2021-01-06 10:03:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:04,337 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2021-01-06 10:03:04,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 10:03:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2021-01-06 10:03:04,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:03:04,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:04,338 INFO L422 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:04,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:03:04,553 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1612336259, now seen corresponding path program 25 times [2021-01-06 10:03:04,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:04,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345924873] [2021-01-06 10:03:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-01-06 10:03:05,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345924873] [2021-01-06 10:03:05,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711416895] [2021-01-06 10:03:05,431 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:05,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:03:05,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-01-06 10:03:05,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:05,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 10:03:05,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25250412] [2021-01-06 10:03:05,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 10:03:05,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:05,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 10:03:05,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:03:05,659 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 38 states. [2021-01-06 10:03:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:05,726 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2021-01-06 10:03:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:03:05,726 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2021-01-06 10:03:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:05,727 INFO L225 Difference]: With dead ends: 138 [2021-01-06 10:03:05,727 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 10:03:05,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:03:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 10:03:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-01-06 10:03:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:03:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-01-06 10:03:05,734 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 86 [2021-01-06 10:03:05,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:05,734 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-01-06 10:03:05,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 10:03:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-01-06 10:03:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 10:03:05,735 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:05,735 INFO L422 BasicCegarLoop]: trace histogram [35, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:05,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:03:05,950 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:05,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1773398046, now seen corresponding path program 26 times [2021-01-06 10:03:05,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:05,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223593695] [2021-01-06 10:03:05,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-01-06 10:03:06,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223593695] [2021-01-06 10:03:06,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507313389] [2021-01-06 10:03:06,769 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:06,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:03:06,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:06,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 10:03:06,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-01-06 10:03:06,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:06,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 10:03:06,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165893948] [2021-01-06 10:03:06,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 10:03:06,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 10:03:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:03:06,989 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 39 states. [2021-01-06 10:03:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:07,052 INFO L93 Difference]: Finished difference Result 139 states and 145 transitions. [2021-01-06 10:03:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 10:03:07,052 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2021-01-06 10:03:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:07,053 INFO L225 Difference]: With dead ends: 139 [2021-01-06 10:03:07,053 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 10:03:07,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:03:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 10:03:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-01-06 10:03:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 10:03:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-01-06 10:03:07,060 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 87 [2021-01-06 10:03:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:07,060 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-01-06 10:03:07,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 10:03:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-01-06 10:03:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 10:03:07,061 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:07,061 INFO L422 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:07,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:03:07,276 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:07,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1823621149, now seen corresponding path program 27 times [2021-01-06 10:03:07,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:07,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973385060] [2021-01-06 10:03:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-01-06 10:03:08,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973385060] [2021-01-06 10:03:08,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688818751] [2021-01-06 10:03:08,211 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:08,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:03:08,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:08,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:03:08,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 5 proven. 110 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2021-01-06 10:03:09,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:09,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 17] total 54 [2021-01-06 10:03:09,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291003263] [2021-01-06 10:03:09,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 10:03:09,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:09,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 10:03:09,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2079, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:03:09,155 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 54 states. [2021-01-06 10:03:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:12,244 INFO L93 Difference]: Finished difference Result 182 states and 191 transitions. [2021-01-06 10:03:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 10:03:12,245 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 88 [2021-01-06 10:03:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:12,245 INFO L225 Difference]: With dead ends: 182 [2021-01-06 10:03:12,246 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 10:03:12,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2273, Invalid=6283, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 10:03:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 10:03:12,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-01-06 10:03:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 10:03:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-01-06 10:03:12,253 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 88 [2021-01-06 10:03:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:12,253 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-01-06 10:03:12,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 10:03:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-01-06 10:03:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:03:12,254 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:12,254 INFO L422 BasicCegarLoop]: trace histogram [37, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:12,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:03:12,457 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:12,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1589679940, now seen corresponding path program 6 times [2021-01-06 10:03:12,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:12,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157711958] [2021-01-06 10:03:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-01-06 10:03:13,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157711958] [2021-01-06 10:03:13,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108199945] [2021-01-06 10:03:13,490 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:14,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 10:03:14,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:14,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:03:14,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2021-01-06 10:03:14,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:14,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 9] total 47 [2021-01-06 10:03:14,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668232679] [2021-01-06 10:03:14,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:03:14,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:14,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:03:14,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=1353, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:03:14,847 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 47 states. [2021-01-06 10:03:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:16,667 INFO L93 Difference]: Finished difference Result 155 states and 163 transitions. [2021-01-06 10:03:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 10:03:16,667 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 89 [2021-01-06 10:03:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:16,668 INFO L225 Difference]: With dead ends: 155 [2021-01-06 10:03:16,668 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 10:03:16,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2611, Invalid=5579, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 10:03:16,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 10:03:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2021-01-06 10:03:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 10:03:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-01-06 10:03:16,676 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 89 [2021-01-06 10:03:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:16,676 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-01-06 10:03:16,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:03:16,677 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-01-06 10:03:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 10:03:16,677 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:16,678 INFO L422 BasicCegarLoop]: trace histogram [38, 7, 7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:16,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:16,894 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:16,894 INFO L82 PathProgramCache]: Analyzing trace with hash 134946703, now seen corresponding path program 28 times [2021-01-06 10:03:16,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:16,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149102788] [2021-01-06 10:03:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:03:17,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149102788] [2021-01-06 10:03:17,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773189313] [2021-01-06 10:03:17,966 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:18,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:03:18,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:18,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 10:03:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:03:18,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:18,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 10:03:18,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681007399] [2021-01-06 10:03:18,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:03:18,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:18,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:03:18,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:03:18,330 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 42 states. [2021-01-06 10:03:18,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:18,407 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2021-01-06 10:03:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:03:18,408 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2021-01-06 10:03:18,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:18,409 INFO L225 Difference]: With dead ends: 148 [2021-01-06 10:03:18,409 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 10:03:18,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:03:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 10:03:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-01-06 10:03:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 10:03:18,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2021-01-06 10:03:18,416 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 93 [2021-01-06 10:03:18,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:18,416 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2021-01-06 10:03:18,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:03:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2021-01-06 10:03:18,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 10:03:18,417 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:18,417 INFO L422 BasicCegarLoop]: trace histogram [39, 7, 7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:18,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:18,628 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:18,628 INFO L82 PathProgramCache]: Analyzing trace with hash 608366474, now seen corresponding path program 29 times [2021-01-06 10:03:18,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:18,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442748836] [2021-01-06 10:03:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:03:19,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442748836] [2021-01-06 10:03:19,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576526888] [2021-01-06 10:03:19,812 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:04:52,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 10:04:52,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:04:52,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:04:52,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:04:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:04:53,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:04:53,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 10:04:53,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105637978] [2021-01-06 10:04:53,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 10:04:53,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:04:53,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 10:04:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:04:53,104 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 43 states. [2021-01-06 10:04:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:04:53,184 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2021-01-06 10:04:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:04:53,185 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2021-01-06 10:04:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:04:53,186 INFO L225 Difference]: With dead ends: 149 [2021-01-06 10:04:53,186 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 10:04:53,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:04:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 10:04:53,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-01-06 10:04:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:04:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2021-01-06 10:04:53,196 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 94 [2021-01-06 10:04:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:04:53,197 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2021-01-06 10:04:53,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 10:04:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2021-01-06 10:04:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 10:04:53,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:04:53,198 INFO L422 BasicCegarLoop]: trace histogram [40, 7, 7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:04:53,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:04:53,412 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:04:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:04:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1895489809, now seen corresponding path program 30 times [2021-01-06 10:04:53,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:04:53,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954828166] [2021-01-06 10:04:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:04:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:04:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:04:54,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954828166] [2021-01-06 10:04:54,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092705513] [2021-01-06 10:04:54,588 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:04:59,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:04:59,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:04:59,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 10:04:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:04:59,773 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 10:04:59,774 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:04:59,781 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:04:59,782 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:04:59,782 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 10:05:00,147 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-01-06 10:05:00,149 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:05:00,159 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:05:00,160 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:05:00,160 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-01-06 10:05:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2021-01-06 10:05:00,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:00,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 17] total 58 [2021-01-06 10:05:00,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274095847] [2021-01-06 10:05:00,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 10:05:00,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:00,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 10:05:00,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=2358, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 10:05:00,901 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 58 states. [2021-01-06 10:05:05,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:05,099 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2021-01-06 10:05:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 10:05:05,102 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 95 [2021-01-06 10:05:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:05,102 INFO L225 Difference]: With dead ends: 159 [2021-01-06 10:05:05,103 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 10:05:05,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2771, Invalid=7531, Unknown=0, NotChecked=0, Total=10302 [2021-01-06 10:05:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 10:05:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2021-01-06 10:05:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 10:05:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2021-01-06 10:05:05,112 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 95 [2021-01-06 10:05:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:05,113 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2021-01-06 10:05:05,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 10:05:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2021-01-06 10:05:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:05:05,114 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:05,114 INFO L422 BasicCegarLoop]: trace histogram [41, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:05,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 10:05:05,329 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash -578916282, now seen corresponding path program 31 times [2021-01-06 10:05:05,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:05,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390822463] [2021-01-06 10:05:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 10:05:06,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390822463] [2021-01-06 10:05:06,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81347114] [2021-01-06 10:05:06,548 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:06,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 10:05:06,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 10:05:06,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:06,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 10:05:06,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125282415] [2021-01-06 10:05:06,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 10:05:06,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:06,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 10:05:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:05:06,800 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 45 states. [2021-01-06 10:05:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:06,901 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2021-01-06 10:05:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:05:06,902 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 101 [2021-01-06 10:05:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:06,903 INFO L225 Difference]: With dead ends: 161 [2021-01-06 10:05:06,903 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 10:05:06,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:05:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 10:05:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-01-06 10:05:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 10:05:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2021-01-06 10:05:06,912 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 101 [2021-01-06 10:05:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:06,912 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2021-01-06 10:05:06,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 10:05:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2021-01-06 10:05:06,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 10:05:06,913 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:06,914 INFO L422 BasicCegarLoop]: trace histogram [42, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:07,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:07,127 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2020600511, now seen corresponding path program 32 times [2021-01-06 10:05:07,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:07,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709906935] [2021-01-06 10:05:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 10:05:08,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709906935] [2021-01-06 10:05:08,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740746091] [2021-01-06 10:05:08,496 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:08,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:05:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 10:05:08,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 10:05:08,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:08,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 10:05:08,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671742611] [2021-01-06 10:05:08,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 10:05:08,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:08,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 10:05:08,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 10:05:08,761 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 46 states. [2021-01-06 10:05:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:08,858 INFO L93 Difference]: Finished difference Result 162 states and 168 transitions. [2021-01-06 10:05:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 10:05:08,864 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2021-01-06 10:05:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:08,865 INFO L225 Difference]: With dead ends: 162 [2021-01-06 10:05:08,865 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:05:08,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 10:05:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:05:08,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-01-06 10:05:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 10:05:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2021-01-06 10:05:08,873 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 102 [2021-01-06 10:05:08,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:08,873 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2021-01-06 10:05:08,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 10:05:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2021-01-06 10:05:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-06 10:05:08,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:08,874 INFO L422 BasicCegarLoop]: trace histogram [43, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:09,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:09,088 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:09,088 INFO L82 PathProgramCache]: Analyzing trace with hash 531828646, now seen corresponding path program 33 times [2021-01-06 10:05:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:09,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561555150] [2021-01-06 10:05:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 10:05:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561555150] [2021-01-06 10:05:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185640685] [2021-01-06 10:05:10,452 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:11,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 10:05:11,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:05:11,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-01-06 10:05:12,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:12,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 19] total 63 [2021-01-06 10:05:12,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585962952] [2021-01-06 10:05:12,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 10:05:12,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:12,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 10:05:12,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2820, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 10:05:12,290 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 63 states. [2021-01-06 10:05:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:15,602 INFO L93 Difference]: Finished difference Result 210 states and 219 transitions. [2021-01-06 10:05:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 10:05:15,603 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 103 [2021-01-06 10:05:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:15,604 INFO L225 Difference]: With dead ends: 210 [2021-01-06 10:05:15,604 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 10:05:15,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2108 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3158, Invalid=8398, Unknown=0, NotChecked=0, Total=11556 [2021-01-06 10:05:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 10:05:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2021-01-06 10:05:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:05:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-01-06 10:05:15,612 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2021-01-06 10:05:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:15,613 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-01-06 10:05:15,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 10:05:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-01-06 10:05:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 10:05:15,614 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:15,614 INFO L422 BasicCegarLoop]: trace histogram [44, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:15,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 10:05:15,829 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:15,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1318361887, now seen corresponding path program 7 times [2021-01-06 10:05:15,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:15,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86270380] [2021-01-06 10:05:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 10:05:17,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86270380] [2021-01-06 10:05:17,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364560971] [2021-01-06 10:05:17,274 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:17,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 10:05:17,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 10:05:17,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:17,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 10:05:17,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083929626] [2021-01-06 10:05:17,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 10:05:17,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:17,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 10:05:17,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:05:17,540 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 48 states. [2021-01-06 10:05:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:17,625 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2021-01-06 10:05:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:05:17,626 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2021-01-06 10:05:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:17,626 INFO L225 Difference]: With dead ends: 170 [2021-01-06 10:05:17,626 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 10:05:17,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:05:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 10:05:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-01-06 10:05:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 10:05:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2021-01-06 10:05:17,635 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 104 [2021-01-06 10:05:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:17,635 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2021-01-06 10:05:17,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 10:05:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2021-01-06 10:05:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 10:05:17,636 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:17,636 INFO L422 BasicCegarLoop]: trace histogram [45, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:17,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 10:05:17,851 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:17,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1776455748, now seen corresponding path program 8 times [2021-01-06 10:05:17,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:17,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247228006] [2021-01-06 10:05:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 10:05:19,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247228006] [2021-01-06 10:05:19,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369410177] [2021-01-06 10:05:19,306 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:19,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:05:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:19,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 10:05:19,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 10:05:19,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:19,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 10:05:19,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759736389] [2021-01-06 10:05:19,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 10:05:19,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:19,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 10:05:19,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:05:19,590 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 49 states. [2021-01-06 10:05:19,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:19,669 INFO L93 Difference]: Finished difference Result 171 states and 179 transitions. [2021-01-06 10:05:19,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 10:05:19,670 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 105 [2021-01-06 10:05:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:19,671 INFO L225 Difference]: With dead ends: 171 [2021-01-06 10:05:19,672 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 10:05:19,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:05:19,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 10:05:19,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-01-06 10:05:19,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 10:05:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-01-06 10:05:19,680 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 105 [2021-01-06 10:05:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:19,681 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-01-06 10:05:19,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 10:05:19,681 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-01-06 10:05:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:05:19,682 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:19,682 INFO L422 BasicCegarLoop]: trace histogram [46, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:19,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 10:05:19,896 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:19,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1202503745, now seen corresponding path program 9 times [2021-01-06 10:05:19,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:19,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132794610] [2021-01-06 10:05:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 10:05:21,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132794610] [2021-01-06 10:05:21,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037767416] [2021-01-06 10:05:21,438 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:21,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 10:05:21,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:21,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:05:21,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-01-06 10:05:22,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:22,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 10] total 57 [2021-01-06 10:05:22,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369006889] [2021-01-06 10:05:22,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 10:05:22,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:22,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 10:05:22,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1213, Invalid=1979, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 10:05:22,301 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 57 states. [2021-01-06 10:05:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:25,024 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2021-01-06 10:05:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 10:05:25,025 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 106 [2021-01-06 10:05:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:25,026 INFO L225 Difference]: With dead ends: 180 [2021-01-06 10:05:25,027 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 10:05:25,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3915, Invalid=8295, Unknown=0, NotChecked=0, Total=12210 [2021-01-06 10:05:25,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 10:05:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-01-06 10:05:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 10:05:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2021-01-06 10:05:25,035 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 106 [2021-01-06 10:05:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:25,036 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2021-01-06 10:05:25,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 10:05:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2021-01-06 10:05:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 10:05:25,036 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:25,037 INFO L422 BasicCegarLoop]: trace histogram [47, 8, 8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:25,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:25,251 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:25,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:25,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1279232946, now seen corresponding path program 34 times [2021-01-06 10:05:25,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:25,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567771299] [2021-01-06 10:05:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:05:26,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567771299] [2021-01-06 10:05:26,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547427537] [2021-01-06 10:05:26,946 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:27,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:05:27,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:27,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 10:05:27,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:05:27,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:27,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 10:05:27,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247087580] [2021-01-06 10:05:27,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 10:05:27,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 10:05:27,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:05:27,334 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 51 states. [2021-01-06 10:05:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:27,453 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2021-01-06 10:05:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 10:05:27,454 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2021-01-06 10:05:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:27,455 INFO L225 Difference]: With dead ends: 173 [2021-01-06 10:05:27,455 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 10:05:27,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:05:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 10:05:27,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-01-06 10:05:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 10:05:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2021-01-06 10:05:27,464 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 110 [2021-01-06 10:05:27,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:27,465 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2021-01-06 10:05:27,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 10:05:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2021-01-06 10:05:27,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:05:27,466 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:27,466 INFO L422 BasicCegarLoop]: trace histogram [48, 8, 8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:27,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:27,681 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:27,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1565079987, now seen corresponding path program 35 times [2021-01-06 10:05:27,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:27,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010080753] [2021-01-06 10:05:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1359 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:05:29,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010080753] [2021-01-06 10:05:29,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931516289] [2021-01-06 10:05:29,484 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true