/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/sorting_bubblesort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:37:54,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:37:54,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:37:54,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 09:37:54,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:37:54,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:37:54,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:37:54,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:37:54,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:37:54,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:37:54,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:37:54,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:37:54,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:37:54,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:37:54,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:37:54,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:37:54,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:37:54,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:37:54,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:37:54,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:37:54,985 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 09:37:55,033 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:37:55,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:37:55,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:37:55,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:37:55,039 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:37:55,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:37:55,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:37:55,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:37:55,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:37:55,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:37:55,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:37:55,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:37:55,042 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:37:55,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:37:55,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:37:55,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:37:55,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:37:55,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:37:55,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:37:55,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:37:55,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:37:55,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:37:55,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:37:55,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:37:55,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:37:55,045 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:37:55,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:37:55,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:37:55,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:37:55,508 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:37:55,509 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:37:55,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2021-01-06 09:37:55,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/04aaea16d/6202725f3e6a4bf3a6892a79717d9bc1/FLAG8be221507 [2021-01-06 09:37:56,259 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:37:56,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2021-01-06 09:37:56,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/04aaea16d/6202725f3e6a4bf3a6892a79717d9bc1/FLAG8be221507 [2021-01-06 09:37:56,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/04aaea16d/6202725f3e6a4bf3a6892a79717d9bc1 [2021-01-06 09:37:56,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:37:56,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:37:56,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:37:56,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:37:56,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:37:56,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44d66d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56, skipping insertion in model container [2021-01-06 09:37:56,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:37:56,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:37:56,823 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/sorting_bubblesort_2_ground.i[820,833] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[BinaryExpression[ARITHMINUS,IdentifierExpression[~i~0,],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 09:37:56,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:37:56,853 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:37:56,868 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/sorting_bubblesort_2_ground.i[820,833] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,IdentifierExpression[~i~0,],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 09:37:56,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:37:56,906 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:37:56,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56 WrapperNode [2021-01-06 09:37:56,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:37:56,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:37:56,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:37:56,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:37:56,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:37:56,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:37:56,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:37:56,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:37:56,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:37:57,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:37:57,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:37:57,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:37:57,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (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 09:37:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:37:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:37:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:37:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:37:57,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:37:57,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:37:57,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:37:57,755 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:37:57,755 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 09:37:57,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:37:57 BoogieIcfgContainer [2021-01-06 09:37:57,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:37:57,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:37:57,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:37:57,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:37:57,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:37:56" (1/3) ... [2021-01-06 09:37:57,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1296270d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:37:57, skipping insertion in model container [2021-01-06 09:37:57,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (2/3) ... [2021-01-06 09:37:57,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1296270d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:37:57, skipping insertion in model container [2021-01-06 09:37:57,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:37:57" (3/3) ... [2021-01-06 09:37:57,783 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2021-01-06 09:37:57,802 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:37:57,817 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:37:57,864 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:37:57,920 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:37:57,920 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:37:57,920 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:37:57,921 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:37:57,921 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:37:57,921 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:37:57,921 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:37:57,921 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:37:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-01-06 09:37:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 09:37:57,955 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:57,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:57,956 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:57,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:57,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2021-01-06 09:37:57,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:57,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500107477] [2021-01-06 09:37:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,214 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 09:37:58,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500107477] [2021-01-06 09:37:58,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:37:58,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:37:58,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963780868] [2021-01-06 09:37:58,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:37:58,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:37:58,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:37:58,246 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2021-01-06 09:37:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:58,278 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2021-01-06 09:37:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:37:58,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 09:37:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:58,289 INFO L225 Difference]: With dead ends: 42 [2021-01-06 09:37:58,290 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 09:37:58,293 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 09:37:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 09:37:58,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-01-06 09:37:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 09:37:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-01-06 09:37:58,329 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-01-06 09:37:58,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:58,330 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-01-06 09:37:58,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:37:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-01-06 09:37:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 09:37:58,331 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:58,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:58,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:37:58,332 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:58,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2021-01-06 09:37:58,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:58,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472456483] [2021-01-06 09:37:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,385 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 09:37:58,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472456483] [2021-01-06 09:37:58,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810872541] [2021-01-06 09:37:58,386 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 09:37:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:37:58,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:37:58,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:37:58,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:37:58,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356793069] [2021-01-06 09:37:58,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:37:58,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:37:58,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:58,540 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2021-01-06 09:37:58,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:58,553 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-01-06 09:37:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:37:58,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-01-06 09:37:58,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:58,555 INFO L225 Difference]: With dead ends: 32 [2021-01-06 09:37:58,555 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 09:37:58,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:58,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 09:37:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 09:37:58,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 09:37:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-01-06 09:37:58,562 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2021-01-06 09:37:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:58,563 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-01-06 09:37:58,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:37:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-01-06 09:37:58,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 09:37:58,564 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:58,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:58,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:37:58,779 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:58,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:58,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2021-01-06 09:37:58,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:58,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615211454] [2021-01-06 09:37:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:37:58,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615211454] [2021-01-06 09:37:58,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765192034] [2021-01-06 09:37:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:37:58,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:37:58,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:37:58,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:37:58,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968266662] [2021-01-06 09:37:58,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:37:58,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:37:58,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:58,910 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 3 states. [2021-01-06 09:37:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:58,928 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-01-06 09:37:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:37:58,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 09:37:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:58,929 INFO L225 Difference]: With dead ends: 44 [2021-01-06 09:37:58,930 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 09:37:58,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 09:37:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-01-06 09:37:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:37:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-01-06 09:37:58,936 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2021-01-06 09:37:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:58,937 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-01-06 09:37:58,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:37:58,937 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-01-06 09:37:58,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 09:37:58,938 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:58,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:59,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:59,153 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:59,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:59,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2021-01-06 09:37:59,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:59,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971246782] [2021-01-06 09:37:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:37:59,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971246782] [2021-01-06 09:37:59,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834405749] [2021-01-06 09:37:59,203 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 09:37:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:59,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:37:59,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:37:59,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:37:59,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:37:59,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940522470] [2021-01-06 09:37:59,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:37:59,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:59,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:37:59,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:59,327 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2021-01-06 09:37:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:59,352 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-01-06 09:37:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:37:59,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-01-06 09:37:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:59,354 INFO L225 Difference]: With dead ends: 46 [2021-01-06 09:37:59,354 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 09:37:59,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 09:37:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 09:37:59,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-01-06 09:37:59,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 09:37:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-01-06 09:37:59,361 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2021-01-06 09:37:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:59,361 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-01-06 09:37:59,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:37:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-01-06 09:37:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 09:37:59,362 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:59,362 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:59,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:59,576 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2021-01-06 09:37:59,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:59,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540404177] [2021-01-06 09:37:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:37:59,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540404177] [2021-01-06 09:37:59,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772729886] [2021-01-06 09:37:59,632 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 09:37:59,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:37:59,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:37:59,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:37:59,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:37:59,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:37:59,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 09:37:59,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260974746] [2021-01-06 09:37:59,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:37:59,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:59,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:37:59,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:37:59,771 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2021-01-06 09:37:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:59,824 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2021-01-06 09:37:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:37:59,825 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-01-06 09:37:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:59,826 INFO L225 Difference]: With dead ends: 57 [2021-01-06 09:37:59,826 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 09:37:59,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:37:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 09:37:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-01-06 09:37:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 09:37:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-01-06 09:37:59,834 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 19 [2021-01-06 09:37:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:59,835 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-01-06 09:37:59,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:37:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-01-06 09:37:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 09:37:59,836 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:59,836 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:00,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:00,053 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:00,056 INFO L82 PathProgramCache]: Analyzing trace with hash -201702437, now seen corresponding path program 3 times [2021-01-06 09:38:00,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:00,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933434730] [2021-01-06 09:38:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:38:00,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933434730] [2021-01-06 09:38:00,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696379620] [2021-01-06 09:38:00,189 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 09:38:00,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 09:38:00,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:00,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:38:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:38:00,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:00,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-01-06 09:38:00,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163454034] [2021-01-06 09:38:00,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:38:00,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:00,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:38:00,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:38:00,364 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 9 states. [2021-01-06 09:38:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:00,450 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-01-06 09:38:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:38:00,450 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2021-01-06 09:38:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:00,451 INFO L225 Difference]: With dead ends: 70 [2021-01-06 09:38:00,451 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 09:38:00,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:38:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 09:38:00,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-01-06 09:38:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 09:38:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-01-06 09:38:00,460 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2021-01-06 09:38:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:00,460 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-01-06 09:38:00,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:38:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-01-06 09:38:00,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:38:00,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:00,461 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:00,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:38:00,676 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:00,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1255714277, now seen corresponding path program 4 times [2021-01-06 09:38:00,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:00,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305565900] [2021-01-06 09:38:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 09:38:00,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305565900] [2021-01-06 09:38:00,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269008843] [2021-01-06 09:38:00,800 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 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 09:38:00,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:00,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:00,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:38:00,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 09:38:00,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:00,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:38:00,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912175839] [2021-01-06 09:38:00,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:38:00,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:00,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:38:00,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:38:00,918 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 8 states. [2021-01-06 09:38:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:00,949 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2021-01-06 09:38:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:38:00,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2021-01-06 09:38:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:00,954 INFO L225 Difference]: With dead ends: 74 [2021-01-06 09:38:00,954 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:38:00,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:38:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:38:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-01-06 09:38:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 09:38:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2021-01-06 09:38:00,970 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 29 [2021-01-06 09:38:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:00,971 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2021-01-06 09:38:00,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:38:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2021-01-06 09:38:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:38:00,972 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:00,972 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:01,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:01,190 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:01,191 INFO L82 PathProgramCache]: Analyzing trace with hash -654389213, now seen corresponding path program 5 times [2021-01-06 09:38:01,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:01,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184984114] [2021-01-06 09:38:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 09:38:01,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184984114] [2021-01-06 09:38:01,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674746777] [2021-01-06 09:38:01,268 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 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 09:38:01,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 09:38:01,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:01,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:38:01,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 09:38:01,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:01,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-01-06 09:38:01,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149427108] [2021-01-06 09:38:01,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:38:01,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:01,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:38:01,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:38:01,426 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 12 states. [2021-01-06 09:38:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:01,507 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2021-01-06 09:38:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:38:01,508 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2021-01-06 09:38:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:01,509 INFO L225 Difference]: With dead ends: 86 [2021-01-06 09:38:01,509 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:38:01,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:38:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:38:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2021-01-06 09:38:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 09:38:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-01-06 09:38:01,516 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 31 [2021-01-06 09:38:01,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:01,517 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-01-06 09:38:01,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:38:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-01-06 09:38:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 09:38:01,518 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:01,519 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:01,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:01,733 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:01,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:01,733 INFO L82 PathProgramCache]: Analyzing trace with hash -568371359, now seen corresponding path program 6 times [2021-01-06 09:38:01,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:01,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886986133] [2021-01-06 09:38:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 09:38:01,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886986133] [2021-01-06 09:38:01,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916024086] [2021-01-06 09:38:01,824 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 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 09:38:01,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:38:01,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:01,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:38:01,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:02,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:02,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-01-06 09:38:02,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994695523] [2021-01-06 09:38:02,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:38:02,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:02,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:38:02,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:38:02,027 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 14 states. [2021-01-06 09:38:02,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:02,114 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2021-01-06 09:38:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:38:02,115 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2021-01-06 09:38:02,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:02,116 INFO L225 Difference]: With dead ends: 100 [2021-01-06 09:38:02,116 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:38:02,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:38:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:38:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-01-06 09:38:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 09:38:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-01-06 09:38:02,122 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 36 [2021-01-06 09:38:02,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:02,123 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-01-06 09:38:02,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:38:02,123 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-01-06 09:38:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:38:02,124 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:02,125 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:02,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:38:02,340 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:02,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1072367713, now seen corresponding path program 7 times [2021-01-06 09:38:02,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:02,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136858428] [2021-01-06 09:38:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:02,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136858428] [2021-01-06 09:38:02,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235761437] [2021-01-06 09:38:02,484 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 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 09:38:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:02,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:38:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:02,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:02,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:38:02,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865652311] [2021-01-06 09:38:02,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:38:02,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:02,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:38:02,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:38:02,640 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 11 states. [2021-01-06 09:38:02,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:02,680 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2021-01-06 09:38:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:38:02,680 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2021-01-06 09:38:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:02,681 INFO L225 Difference]: With dead ends: 104 [2021-01-06 09:38:02,681 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 09:38:02,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:38:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 09:38:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-01-06 09:38:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 09:38:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2021-01-06 09:38:02,689 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 41 [2021-01-06 09:38:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:02,689 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2021-01-06 09:38:02,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:38:02,690 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2021-01-06 09:38:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 09:38:02,691 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:02,691 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:02,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:02,906 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:02,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1876143325, now seen corresponding path program 8 times [2021-01-06 09:38:02,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:02,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039957391] [2021-01-06 09:38:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:03,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039957391] [2021-01-06 09:38:03,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320896019] [2021-01-06 09:38:03,063 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 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 09:38:03,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:03,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:03,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:38:03,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:03,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:03,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:38:03,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486906758] [2021-01-06 09:38:03,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:38:03,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:03,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:38:03,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:38:03,240 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 12 states. [2021-01-06 09:38:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:03,283 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2021-01-06 09:38:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:38:03,284 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2021-01-06 09:38:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:03,284 INFO L225 Difference]: With dead ends: 106 [2021-01-06 09:38:03,285 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:38:03,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:38:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:38:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 09:38:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 09:38:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-01-06 09:38:03,292 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 43 [2021-01-06 09:38:03,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:03,292 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-01-06 09:38:03,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:38:03,292 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-01-06 09:38:03,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 09:38:03,294 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:03,294 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:03,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:03,511 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash 716835483, now seen corresponding path program 9 times [2021-01-06 09:38:03,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:03,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233112133] [2021-01-06 09:38:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:03,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233112133] [2021-01-06 09:38:03,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368073178] [2021-01-06 09:38:03,634 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 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 09:38:03,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 09:38:03,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:38:03,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:38:03,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:03,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-01-06 09:38:03,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109736752] [2021-01-06 09:38:03,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:38:03,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:03,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:38:03,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:03,877 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 18 states. [2021-01-06 09:38:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:03,983 INFO L93 Difference]: Finished difference Result 118 states and 152 transitions. [2021-01-06 09:38:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:38:03,983 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2021-01-06 09:38:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:03,984 INFO L225 Difference]: With dead ends: 118 [2021-01-06 09:38:03,984 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 09:38:03,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 09:38:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-01-06 09:38:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 09:38:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-01-06 09:38:04,006 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 45 [2021-01-06 09:38:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:04,008 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-01-06 09:38:04,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:38:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-01-06 09:38:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 09:38:04,012 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:04,012 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:04,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:38:04,214 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:04,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 10 times [2021-01-06 09:38:04,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:04,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181582990] [2021-01-06 09:38:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 09:38:04,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181582990] [2021-01-06 09:38:04,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116778094] [2021-01-06 09:38:04,388 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 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 09:38:04,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:04,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:04,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:38:04,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 09:38:04,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:04,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:38:04,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143347979] [2021-01-06 09:38:04,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:38:04,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:04,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:38:04,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:38:04,539 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 14 states. [2021-01-06 09:38:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:04,594 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2021-01-06 09:38:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:38:04,594 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2021-01-06 09:38:04,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:04,595 INFO L225 Difference]: With dead ends: 122 [2021-01-06 09:38:04,595 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 09:38:04,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:38:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 09:38:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-01-06 09:38:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 09:38:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2021-01-06 09:38:04,601 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 50 [2021-01-06 09:38:04,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:04,601 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2021-01-06 09:38:04,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:38:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2021-01-06 09:38:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 09:38:04,602 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:04,602 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:04,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:38:04,816 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1720209685, now seen corresponding path program 11 times [2021-01-06 09:38:04,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:04,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602942694] [2021-01-06 09:38:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 09:38:04,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602942694] [2021-01-06 09:38:04,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402537785] [2021-01-06 09:38:04,975 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 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 09:38:05,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 09:38:05,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:05,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:38:05,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:38:05,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:05,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-01-06 09:38:05,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853528901] [2021-01-06 09:38:05,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:38:05,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:05,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:38:05,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:38:05,309 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 21 states. [2021-01-06 09:38:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:05,444 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2021-01-06 09:38:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 09:38:05,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2021-01-06 09:38:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:05,446 INFO L225 Difference]: With dead ends: 134 [2021-01-06 09:38:05,446 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 09:38:05,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:38:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 09:38:05,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2021-01-06 09:38:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 09:38:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2021-01-06 09:38:05,451 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 52 [2021-01-06 09:38:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:05,452 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2021-01-06 09:38:05,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:38:05,452 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2021-01-06 09:38:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 09:38:05,453 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:05,453 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:05,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:38:05,669 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:05,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2017640405, now seen corresponding path program 12 times [2021-01-06 09:38:05,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:05,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565034892] [2021-01-06 09:38:05,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:05,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565034892] [2021-01-06 09:38:05,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25527106] [2021-01-06 09:38:05,830 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 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 09:38:06,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 09:38:06,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:38:06,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:06,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:06,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:38:06,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823249130] [2021-01-06 09:38:06,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:38:06,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:06,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:38:06,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:38:06,151 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand 16 states. [2021-01-06 09:38:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:06,209 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2021-01-06 09:38:06,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:38:06,209 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2021-01-06 09:38:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:06,210 INFO L225 Difference]: With dead ends: 138 [2021-01-06 09:38:06,210 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 09:38:06,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 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 09:38:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 09:38:06,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-01-06 09:38:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 09:38:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-01-06 09:38:06,215 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 57 [2021-01-06 09:38:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:06,216 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-01-06 09:38:06,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:38:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-01-06 09:38:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 09:38:06,217 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:06,217 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:06,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:06,432 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1894041325, now seen corresponding path program 13 times [2021-01-06 09:38:06,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:06,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064528285] [2021-01-06 09:38:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:06,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064528285] [2021-01-06 09:38:06,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208097533] [2021-01-06 09:38:06,635 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 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 09:38:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:06,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:38:06,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:06,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:06,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:38:06,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040597099] [2021-01-06 09:38:06,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:38:06,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:38:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:38:06,782 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 17 states. [2021-01-06 09:38:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:06,841 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2021-01-06 09:38:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:38:06,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2021-01-06 09:38:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:06,842 INFO L225 Difference]: With dead ends: 140 [2021-01-06 09:38:06,843 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 09:38:06,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 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 09:38:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 09:38:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 09:38:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 09:38:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2021-01-06 09:38:06,847 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 59 [2021-01-06 09:38:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:06,847 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2021-01-06 09:38:06,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:38:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2021-01-06 09:38:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:38:06,848 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:06,848 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:07,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:38:07,063 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1371167441, now seen corresponding path program 14 times [2021-01-06 09:38:07,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:07,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278785651] [2021-01-06 09:38:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:07,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278785651] [2021-01-06 09:38:07,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527062371] [2021-01-06 09:38:07,303 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 09:38:07,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:07,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:07,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:38:07,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:07,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:07,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:38:07,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754158154] [2021-01-06 09:38:07,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:38:07,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:38:07,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:07,520 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 18 states. [2021-01-06 09:38:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:07,581 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2021-01-06 09:38:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:38:07,582 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2021-01-06 09:38:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:07,585 INFO L225 Difference]: With dead ends: 142 [2021-01-06 09:38:07,585 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 09:38:07,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 09:38:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 09:38:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 09:38:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2021-01-06 09:38:07,592 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 61 [2021-01-06 09:38:07,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:07,593 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2021-01-06 09:38:07,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:38:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2021-01-06 09:38:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 09:38:07,594 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:07,594 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:07,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:38:07,809 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:07,810 INFO L82 PathProgramCache]: Analyzing trace with hash -384301809, now seen corresponding path program 15 times [2021-01-06 09:38:07,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:07,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20657145] [2021-01-06 09:38:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:08,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20657145] [2021-01-06 09:38:08,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985208031] [2021-01-06 09:38:08,022 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 09:38:08,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:38:08,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:08,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:38:08,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:38:08,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:08,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2021-01-06 09:38:08,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866493509] [2021-01-06 09:38:08,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 09:38:08,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:08,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 09:38:08,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:38:08,356 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand 26 states. [2021-01-06 09:38:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:08,499 INFO L93 Difference]: Finished difference Result 154 states and 196 transitions. [2021-01-06 09:38:08,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 09:38:08,499 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2021-01-06 09:38:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:08,500 INFO L225 Difference]: With dead ends: 154 [2021-01-06 09:38:08,500 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 09:38:08,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:38:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 09:38:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-01-06 09:38:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 09:38:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2021-01-06 09:38:08,505 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 63 [2021-01-06 09:38:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:08,506 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2021-01-06 09:38:08,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 09:38:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2021-01-06 09:38:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 09:38:08,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:08,507 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:08,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:38:08,721 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2008179445, now seen corresponding path program 16 times [2021-01-06 09:38:08,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:08,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90282021] [2021-01-06 09:38:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 09:38:08,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90282021] [2021-01-06 09:38:08,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930987928] [2021-01-06 09:38:08,973 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 09:38:09,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:09,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:09,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:38:09,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 09:38:09,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:09,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:38:09,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805497137] [2021-01-06 09:38:09,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:38:09,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:09,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:38:09,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:38:09,150 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 20 states. [2021-01-06 09:38:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:09,211 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2021-01-06 09:38:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:38:09,211 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2021-01-06 09:38:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:09,212 INFO L225 Difference]: With dead ends: 158 [2021-01-06 09:38:09,212 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 09:38:09,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:38:09,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 09:38:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-01-06 09:38:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 09:38:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2021-01-06 09:38:09,216 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 68 [2021-01-06 09:38:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:09,217 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2021-01-06 09:38:09,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:38:09,217 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2021-01-06 09:38:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 09:38:09,218 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:09,218 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:09,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:09,429 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash -32876809, now seen corresponding path program 17 times [2021-01-06 09:38:09,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:09,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798257697] [2021-01-06 09:38:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 09:38:09,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798257697] [2021-01-06 09:38:09,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163916708] [2021-01-06 09:38:09,721 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 09:38:09,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 09:38:09,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:38:09,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 09:38:10,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:10,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2021-01-06 09:38:10,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084149452] [2021-01-06 09:38:10,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:38:10,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:10,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:38:10,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:38:10,247 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 29 states. [2021-01-06 09:38:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:10,410 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2021-01-06 09:38:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:38:10,411 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2021-01-06 09:38:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:10,412 INFO L225 Difference]: With dead ends: 170 [2021-01-06 09:38:10,412 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 09:38:10,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:38:10,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 09:38:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2021-01-06 09:38:10,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 09:38:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2021-01-06 09:38:10,417 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 70 [2021-01-06 09:38:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:10,417 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2021-01-06 09:38:10,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:38:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2021-01-06 09:38:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 09:38:10,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:10,418 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:10,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:10,632 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1211963593, now seen corresponding path program 18 times [2021-01-06 09:38:10,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:10,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331933123] [2021-01-06 09:38:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-01-06 09:38:10,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331933123] [2021-01-06 09:38:10,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949575590] [2021-01-06 09:38:10,913 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 09:38:11,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 09:38:11,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:11,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:38:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 09:38:11,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:11,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2021-01-06 09:38:11,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47124024] [2021-01-06 09:38:11,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 09:38:11,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 09:38:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2021-01-06 09:38:11,692 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 31 states. [2021-01-06 09:38:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:11,868 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2021-01-06 09:38:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 09:38:11,868 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2021-01-06 09:38:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:11,869 INFO L225 Difference]: With dead ends: 184 [2021-01-06 09:38:11,869 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 09:38:11,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2021-01-06 09:38:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 09:38:11,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2021-01-06 09:38:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 09:38:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2021-01-06 09:38:11,875 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 75 [2021-01-06 09:38:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:11,875 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2021-01-06 09:38:11,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 09:38:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2021-01-06 09:38:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 09:38:11,876 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:11,876 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:12,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 09:38:12,091 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:12,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:12,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2135143941, now seen corresponding path program 19 times [2021-01-06 09:38:12,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:12,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31167299] [2021-01-06 09:38:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-01-06 09:38:12,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31167299] [2021-01-06 09:38:12,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317254717] [2021-01-06 09:38:12,433 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 09:38:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:12,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:38:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-01-06 09:38:12,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:12,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:38:12,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684395562] [2021-01-06 09:38:12,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:38:12,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:38:12,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:38:12,619 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand 23 states. [2021-01-06 09:38:12,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:12,689 INFO L93 Difference]: Finished difference Result 188 states and 236 transitions. [2021-01-06 09:38:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:38:12,690 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 80 [2021-01-06 09:38:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:12,691 INFO L225 Difference]: With dead ends: 188 [2021-01-06 09:38:12,691 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 09:38:12,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:38:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 09:38:12,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-01-06 09:38:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 09:38:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2021-01-06 09:38:12,700 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 80 [2021-01-06 09:38:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:12,701 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2021-01-06 09:38:12,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:38:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2021-01-06 09:38:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 09:38:12,702 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:12,702 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:12,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:38:12,916 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:12,917 INFO L82 PathProgramCache]: Analyzing trace with hash -70497539, now seen corresponding path program 20 times [2021-01-06 09:38:12,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:12,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638565598] [2021-01-06 09:38:12,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-01-06 09:38:13,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638565598] [2021-01-06 09:38:13,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552187652] [2021-01-06 09:38:13,300 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 09:38:13,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:13,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:13,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:38:13,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-01-06 09:38:13,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:13,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 09:38:13,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302733226] [2021-01-06 09:38:13,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:38:13,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:13,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:38:13,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:38:13,545 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand 24 states. [2021-01-06 09:38:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:13,627 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2021-01-06 09:38:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:38:13,628 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2021-01-06 09:38:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:13,629 INFO L225 Difference]: With dead ends: 190 [2021-01-06 09:38:13,629 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 09:38:13,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 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 09:38:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 09:38:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-01-06 09:38:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 09:38:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2021-01-06 09:38:13,634 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 82 [2021-01-06 09:38:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:13,634 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2021-01-06 09:38:13,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:38:13,634 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2021-01-06 09:38:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 09:38:13,635 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:13,635 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:13,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:13,849 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:13,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:13,850 INFO L82 PathProgramCache]: Analyzing trace with hash -220195969, now seen corresponding path program 21 times [2021-01-06 09:38:13,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:13,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119103767] [2021-01-06 09:38:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-01-06 09:38:14,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119103767] [2021-01-06 09:38:14,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028072009] [2021-01-06 09:38:14,224 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 09:38:14,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 09:38:14,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:14,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:38:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 09:38:14,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:14,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2021-01-06 09:38:14,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009794216] [2021-01-06 09:38:14,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 09:38:14,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:14,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 09:38:14,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:14,753 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 35 states. [2021-01-06 09:38:14,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:14,942 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2021-01-06 09:38:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 09:38:14,943 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2021-01-06 09:38:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:14,944 INFO L225 Difference]: With dead ends: 202 [2021-01-06 09:38:14,944 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 09:38:14,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 09:38:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2021-01-06 09:38:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 09:38:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2021-01-06 09:38:14,950 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 84 [2021-01-06 09:38:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:14,950 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2021-01-06 09:38:14,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 09:38:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2021-01-06 09:38:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 09:38:14,951 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:14,951 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:15,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 09:38:15,167 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:15,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1727048385, now seen corresponding path program 22 times [2021-01-06 09:38:15,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:15,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876014417] [2021-01-06 09:38:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-01-06 09:38:15,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876014417] [2021-01-06 09:38:15,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120230840] [2021-01-06 09:38:15,559 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 09:38:15,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:15,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:15,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:38:15,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-01-06 09:38:15,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:15,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 09:38:15,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586080907] [2021-01-06 09:38:15,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 09:38:15,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 09:38:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:38:15,783 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand 26 states. [2021-01-06 09:38:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:15,874 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2021-01-06 09:38:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 09:38:15,875 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 89 [2021-01-06 09:38:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:15,876 INFO L225 Difference]: With dead ends: 206 [2021-01-06 09:38:15,876 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 09:38:15,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:38:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 09:38:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-01-06 09:38:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 09:38:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2021-01-06 09:38:15,883 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 89 [2021-01-06 09:38:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:15,883 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2021-01-06 09:38:15,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 09:38:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2021-01-06 09:38:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 09:38:15,884 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:15,884 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:16,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:16,098 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:16,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1880839169, now seen corresponding path program 23 times [2021-01-06 09:38:16,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:16,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597914923] [2021-01-06 09:38:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-01-06 09:38:16,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597914923] [2021-01-06 09:38:16,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514285125] [2021-01-06 09:38:16,515 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 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 09:38:17,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-01-06 09:38:17,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:38:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 09:38:17,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:17,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2021-01-06 09:38:17,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388758238] [2021-01-06 09:38:17,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 09:38:17,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:17,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 09:38:17,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:38:17,490 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand 38 states. [2021-01-06 09:38:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:17,704 INFO L93 Difference]: Finished difference Result 218 states and 276 transitions. [2021-01-06 09:38:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 09:38:17,709 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 91 [2021-01-06 09:38:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:17,710 INFO L225 Difference]: With dead ends: 218 [2021-01-06 09:38:17,710 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 09:38:17,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:38:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 09:38:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-01-06 09:38:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-01-06 09:38:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2021-01-06 09:38:17,720 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 91 [2021-01-06 09:38:17,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:17,720 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2021-01-06 09:38:17,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 09:38:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2021-01-06 09:38:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 09:38:17,721 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:17,721 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:17,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 09:38:17,936 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:17,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1961812219, now seen corresponding path program 24 times [2021-01-06 09:38:17,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:17,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919628645] [2021-01-06 09:38:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-01-06 09:38:18,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919628645] [2021-01-06 09:38:18,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870313657] [2021-01-06 09:38:18,382 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 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 09:38:19,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 09:38:19,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:19,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:38:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 09:38:20,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:20,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 40 [2021-01-06 09:38:20,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497093659] [2021-01-06 09:38:20,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 09:38:20,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:20,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 09:38:20,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:38:20,374 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand 40 states. [2021-01-06 09:38:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:20,611 INFO L93 Difference]: Finished difference Result 232 states and 294 transitions. [2021-01-06 09:38:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 09:38:20,611 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 96 [2021-01-06 09:38:20,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:20,612 INFO L225 Difference]: With dead ends: 232 [2021-01-06 09:38:20,613 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 09:38:20,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:38:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 09:38:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2021-01-06 09:38:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 09:38:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2021-01-06 09:38:20,619 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 96 [2021-01-06 09:38:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:20,619 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2021-01-06 09:38:20,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 09:38:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2021-01-06 09:38:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 09:38:20,620 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:20,621 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:20,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 09:38:20,834 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:20,836 INFO L82 PathProgramCache]: Analyzing trace with hash -226001797, now seen corresponding path program 25 times [2021-01-06 09:38:20,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:20,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589193717] [2021-01-06 09:38:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-01-06 09:38:21,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589193717] [2021-01-06 09:38:21,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614923604] [2021-01-06 09:38:21,352 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 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 09:38:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:21,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 09:38:21,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-01-06 09:38:21,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:21,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 09:38:21,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016987138] [2021-01-06 09:38:21,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:38:21,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:21,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:38:21,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:38:21,582 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 29 states. [2021-01-06 09:38:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:21,680 INFO L93 Difference]: Finished difference Result 236 states and 296 transitions. [2021-01-06 09:38:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 09:38:21,683 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 101 [2021-01-06 09:38:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:21,684 INFO L225 Difference]: With dead ends: 236 [2021-01-06 09:38:21,684 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 09:38:21,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 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 09:38:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 09:38:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-01-06 09:38:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 09:38:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2021-01-06 09:38:21,691 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 101 [2021-01-06 09:38:21,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:21,692 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2021-01-06 09:38:21,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:38:21,692 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2021-01-06 09:38:21,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-06 09:38:21,693 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:21,693 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:21,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 09:38:21,903 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:21,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:21,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1807904583, now seen corresponding path program 26 times [2021-01-06 09:38:21,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:21,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520469785] [2021-01-06 09:38:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-01-06 09:38:22,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520469785] [2021-01-06 09:38:22,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638019140] [2021-01-06 09:38:22,423 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 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 09:38:22,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:22,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:22,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 09:38:22,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-01-06 09:38:22,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:22,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 09:38:22,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707234231] [2021-01-06 09:38:22,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 09:38:22,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:22,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 09:38:22,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:38:22,664 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand 30 states. [2021-01-06 09:38:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:22,775 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2021-01-06 09:38:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:38:22,776 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 103 [2021-01-06 09:38:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:22,777 INFO L225 Difference]: With dead ends: 238 [2021-01-06 09:38:22,777 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 09:38:22,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:38:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 09:38:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-01-06 09:38:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 09:38:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2021-01-06 09:38:22,786 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 103 [2021-01-06 09:38:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:22,786 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2021-01-06 09:38:22,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 09:38:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2021-01-06 09:38:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 09:38:22,787 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:22,787 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:23,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 09:38:23,001 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:23,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1598059145, now seen corresponding path program 27 times [2021-01-06 09:38:23,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:23,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143807850] [2021-01-06 09:38:23,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-01-06 09:38:23,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143807850] [2021-01-06 09:38:23,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893972353] [2021-01-06 09:38:23,559 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 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 09:38:23,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 09:38:23,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:38:23,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-01-06 09:38:24,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:24,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16] total 44 [2021-01-06 09:38:24,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250090513] [2021-01-06 09:38:24,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 09:38:24,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:24,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 09:38:24,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 09:38:24,291 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 44 states. [2021-01-06 09:38:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:24,517 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2021-01-06 09:38:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 09:38:24,518 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 105 [2021-01-06 09:38:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:24,519 INFO L225 Difference]: With dead ends: 250 [2021-01-06 09:38:24,519 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 09:38:24,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 09:38:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 09:38:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2021-01-06 09:38:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 09:38:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2021-01-06 09:38:24,525 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 105 [2021-01-06 09:38:24,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:24,526 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2021-01-06 09:38:24,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 09:38:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2021-01-06 09:38:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 09:38:24,527 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:24,527 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:24,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:24,740 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:24,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1910005517, now seen corresponding path program 28 times [2021-01-06 09:38:24,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:24,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376416869] [2021-01-06 09:38:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:38:25,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376416869] [2021-01-06 09:38:25,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192968335] [2021-01-06 09:38:25,327 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 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 09:38:25,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:25,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:25,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 09:38:25,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:38:25,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:25,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 09:38:25,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927382066] [2021-01-06 09:38:25,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 09:38:25,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:25,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 09:38:25,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:38:25,563 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand 32 states. [2021-01-06 09:38:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:25,666 INFO L93 Difference]: Finished difference Result 254 states and 318 transitions. [2021-01-06 09:38:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 09:38:25,666 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 110 [2021-01-06 09:38:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:25,667 INFO L225 Difference]: With dead ends: 254 [2021-01-06 09:38:25,667 INFO L226 Difference]: Without dead ends: 158 [2021-01-06 09:38:25,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 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 09:38:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-01-06 09:38:25,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-01-06 09:38:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 09:38:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 189 transitions. [2021-01-06 09:38:25,673 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 189 transitions. Word has length 110 [2021-01-06 09:38:25,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:25,674 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 189 transitions. [2021-01-06 09:38:25,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 09:38:25,674 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 189 transitions. [2021-01-06 09:38:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 09:38:25,675 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:25,675 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:25,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:25,890 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1132605583, now seen corresponding path program 29 times [2021-01-06 09:38:25,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:25,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322413875] [2021-01-06 09:38:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:38:26,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322413875] [2021-01-06 09:38:26,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710268055] [2021-01-06 09:38:26,534 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 09:38:30,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-01-06 09:38:30,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:30,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:38:30,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-01-06 09:38:31,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:31,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 17] total 47 [2021-01-06 09:38:31,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258086675] [2021-01-06 09:38:31,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 09:38:31,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:31,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 09:38:31,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 09:38:31,431 INFO L87 Difference]: Start difference. First operand 157 states and 189 transitions. Second operand 47 states. [2021-01-06 09:38:31,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:31,719 INFO L93 Difference]: Finished difference Result 266 states and 336 transitions. [2021-01-06 09:38:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 09:38:31,719 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 112 [2021-01-06 09:38:31,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:31,720 INFO L225 Difference]: With dead ends: 266 [2021-01-06 09:38:31,720 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 09:38:31,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 09:38:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 09:38:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-01-06 09:38:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 09:38:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2021-01-06 09:38:31,728 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 112 [2021-01-06 09:38:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:31,728 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2021-01-06 09:38:31,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 09:38:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2021-01-06 09:38:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 09:38:31,729 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:31,729 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:31,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:31,945 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1997294257, now seen corresponding path program 30 times [2021-01-06 09:38:31,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:31,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524525201] [2021-01-06 09:38:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-01-06 09:38:32,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524525201] [2021-01-06 09:38:32,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123361330] [2021-01-06 09:38:32,640 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 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 09:38:37,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 09:38:37,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:37,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:38:37,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-01-06 09:38:37,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:37,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 18] total 49 [2021-01-06 09:38:37,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088682480] [2021-01-06 09:38:37,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 09:38:37,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 09:38:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 09:38:37,927 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand 49 states. [2021-01-06 09:38:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:38,182 INFO L93 Difference]: Finished difference Result 280 states and 354 transitions. [2021-01-06 09:38:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 09:38:38,182 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 117 [2021-01-06 09:38:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:38,183 INFO L225 Difference]: With dead ends: 280 [2021-01-06 09:38:38,183 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 09:38:38,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 09:38:38,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 09:38:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2021-01-06 09:38:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 09:38:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2021-01-06 09:38:38,190 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 117 [2021-01-06 09:38:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:38,191 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2021-01-06 09:38:38,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 09:38:38,191 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2021-01-06 09:38:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-01-06 09:38:38,192 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:38,192 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:38,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 09:38:38,407 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:38,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1124602733, now seen corresponding path program 31 times [2021-01-06 09:38:38,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:38,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73790174] [2021-01-06 09:38:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-01-06 09:38:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73790174] [2021-01-06 09:38:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752413041] [2021-01-06 09:38:39,079 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 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 09:38:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:39,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 09:38:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-01-06 09:38:39,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:39,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 09:38:39,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002964392] [2021-01-06 09:38:39,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 09:38:39,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:39,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 09:38:39,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:39,342 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand 35 states. [2021-01-06 09:38:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:39,471 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2021-01-06 09:38:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 09:38:39,472 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 122 [2021-01-06 09:38:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:39,473 INFO L225 Difference]: With dead ends: 284 [2021-01-06 09:38:39,473 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 09:38:39,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 09:38:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-01-06 09:38:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 09:38:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-01-06 09:38:39,481 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 122 [2021-01-06 09:38:39,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:39,481 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-01-06 09:38:39,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 09:38:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-01-06 09:38:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 09:38:39,482 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:39,482 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:39,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:39,697 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1878625045, now seen corresponding path program 32 times [2021-01-06 09:38:39,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:39,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439258304] [2021-01-06 09:38:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-01-06 09:38:40,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439258304] [2021-01-06 09:38:40,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687632072] [2021-01-06 09:38:40,484 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 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 09:38:40,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:40,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:40,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 09:38:40,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-01-06 09:38:40,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:40,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 09:38:40,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526008061] [2021-01-06 09:38:40,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 09:38:40,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:40,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 09:38:40,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:38:40,751 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand 36 states. [2021-01-06 09:38:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:40,870 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2021-01-06 09:38:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 09:38:40,871 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2021-01-06 09:38:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:40,872 INFO L225 Difference]: With dead ends: 286 [2021-01-06 09:38:40,872 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 09:38:40,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:38:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 09:38:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-01-06 09:38:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 09:38:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2021-01-06 09:38:40,878 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 124 [2021-01-06 09:38:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:40,879 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2021-01-06 09:38:40,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 09:38:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2021-01-06 09:38:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 09:38:40,880 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:40,880 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:41,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 09:38:41,089 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:41,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1762496791, now seen corresponding path program 33 times [2021-01-06 09:38:41,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:41,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986040715] [2021-01-06 09:38:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-01-06 09:38:41,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986040715] [2021-01-06 09:38:41,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945257853] [2021-01-06 09:38:41,890 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 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 09:38:42,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 09:38:42,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:42,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:38:42,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-01-06 09:38:43,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:43,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19] total 53 [2021-01-06 09:38:43,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445676423] [2021-01-06 09:38:43,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 09:38:43,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:43,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 09:38:43,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 09:38:43,188 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand 53 states. [2021-01-06 09:38:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:43,555 INFO L93 Difference]: Finished difference Result 298 states and 376 transitions. [2021-01-06 09:38:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 09:38:43,556 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 126 [2021-01-06 09:38:43,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:43,557 INFO L225 Difference]: With dead ends: 298 [2021-01-06 09:38:43,557 INFO L226 Difference]: Without dead ends: 190 [2021-01-06 09:38:43,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 09:38:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-01-06 09:38:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2021-01-06 09:38:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 09:38:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 223 transitions. [2021-01-06 09:38:43,568 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 223 transitions. Word has length 126 [2021-01-06 09:38:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:43,568 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 223 transitions. [2021-01-06 09:38:43,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 09:38:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 223 transitions. [2021-01-06 09:38:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 09:38:43,569 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:43,570 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:43,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:43,784 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:43,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:43,784 INFO L82 PathProgramCache]: Analyzing trace with hash 247814313, now seen corresponding path program 34 times [2021-01-06 09:38:43,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:43,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699374624] [2021-01-06 09:38:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-01-06 09:38:44,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699374624] [2021-01-06 09:38:44,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557054169] [2021-01-06 09:38:44,526 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 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 09:38:44,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:44,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:44,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 09:38:44,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-01-06 09:38:44,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:44,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 09:38:44,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037438730] [2021-01-06 09:38:44,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 09:38:44,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 09:38:44,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:38:44,789 INFO L87 Difference]: Start difference. First operand 185 states and 223 transitions. Second operand 38 states. [2021-01-06 09:38:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:44,951 INFO L93 Difference]: Finished difference Result 302 states and 378 transitions. [2021-01-06 09:38:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 09:38:44,952 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 131 [2021-01-06 09:38:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:44,953 INFO L225 Difference]: With dead ends: 302 [2021-01-06 09:38:44,953 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 09:38:44,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:38:44,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 09:38:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-01-06 09:38:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 09:38:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2021-01-06 09:38:44,960 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 131 [2021-01-06 09:38:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:44,960 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2021-01-06 09:38:44,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 09:38:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2021-01-06 09:38:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-01-06 09:38:44,961 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:44,961 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:45,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 09:38:45,177 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:45,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1912542105, now seen corresponding path program 35 times [2021-01-06 09:38:45,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:45,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682787779] [2021-01-06 09:38:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-01-06 09:38:46,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682787779] [2021-01-06 09:38:46,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644929389] [2021-01-06 09:38:46,056 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 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 09:38:52,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-01-06 09:38:52,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:52,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:38:52,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-01-06 09:38:52,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:52,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20] total 56 [2021-01-06 09:38:52,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565633993] [2021-01-06 09:38:52,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 09:38:52,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:52,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 09:38:52,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 09:38:52,891 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand 56 states. [2021-01-06 09:38:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:53,158 INFO L93 Difference]: Finished difference Result 314 states and 396 transitions. [2021-01-06 09:38:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 09:38:53,159 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2021-01-06 09:38:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:53,161 INFO L225 Difference]: With dead ends: 314 [2021-01-06 09:38:53,161 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 09:38:53,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 09:38:53,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 09:38:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2021-01-06 09:38:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 09:38:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 235 transitions. [2021-01-06 09:38:53,171 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 235 transitions. Word has length 133 [2021-01-06 09:38:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:53,172 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 235 transitions. [2021-01-06 09:38:53,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 09:38:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 235 transitions. [2021-01-06 09:38:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 09:38:53,173 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:53,173 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:53,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 09:38:53,387 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:53,388 INFO L82 PathProgramCache]: Analyzing trace with hash 550249245, now seen corresponding path program 36 times [2021-01-06 09:38:53,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:53,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732597801] [2021-01-06 09:38:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2021-01-06 09:38:54,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732597801] [2021-01-06 09:38:54,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645468574] [2021-01-06 09:38:54,388 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 09:39:05,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 09:39:05,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:05,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 09:39:05,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 72 proven. 477 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-01-06 09:39:06,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:06,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 23] total 60 [2021-01-06 09:39:06,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781570288] [2021-01-06 09:39:06,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 09:39:06,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:06,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 09:39:06,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=2511, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 09:39:06,221 INFO L87 Difference]: Start difference. First operand 195 states and 235 transitions. Second operand 60 states. [2021-01-06 09:39:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:07,420 INFO L93 Difference]: Finished difference Result 329 states and 416 transitions. [2021-01-06 09:39:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 09:39:07,421 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 138 [2021-01-06 09:39:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:07,422 INFO L225 Difference]: With dead ends: 329 [2021-01-06 09:39:07,422 INFO L226 Difference]: Without dead ends: 209 [2021-01-06 09:39:07,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1447, Invalid=4715, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 09:39:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-01-06 09:39:07,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2021-01-06 09:39:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-01-06 09:39:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2021-01-06 09:39:07,431 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 138 [2021-01-06 09:39:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:07,431 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2021-01-06 09:39:07,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 09:39:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2021-01-06 09:39:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-01-06 09:39:07,432 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:07,433 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:07,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 09:39:07,646 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:07,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:07,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1263614625, now seen corresponding path program 37 times [2021-01-06 09:39:07,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:07,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74412772] [2021-01-06 09:39:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-01-06 09:39:08,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74412772] [2021-01-06 09:39:08,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071718984] [2021-01-06 09:39:08,689 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 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 09:39:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:08,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 09:39:08,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-01-06 09:39:08,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:08,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 09:39:08,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878615366] [2021-01-06 09:39:08,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 09:39:08,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:08,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 09:39:09,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 09:39:09,000 INFO L87 Difference]: Start difference. First operand 205 states and 247 transitions. Second operand 42 states. [2021-01-06 09:39:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:09,199 INFO L93 Difference]: Finished difference Result 334 states and 418 transitions. [2021-01-06 09:39:09,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 09:39:09,199 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 145 [2021-01-06 09:39:09,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:09,201 INFO L225 Difference]: With dead ends: 334 [2021-01-06 09:39:09,201 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 09:39:09,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 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 09:39:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 09:39:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-01-06 09:39:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 09:39:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2021-01-06 09:39:09,209 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 145 [2021-01-06 09:39:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:09,209 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2021-01-06 09:39:09,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 09:39:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2021-01-06 09:39:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-01-06 09:39:09,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:09,211 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:09,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 09:39:09,424 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:09,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1238865441, now seen corresponding path program 38 times [2021-01-06 09:39:09,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:09,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300735378] [2021-01-06 09:39:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-01-06 09:39:10,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300735378] [2021-01-06 09:39:10,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762592198] [2021-01-06 09:39:10,516 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 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 09:39:10,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:39:10,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:10,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 09:39:10,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-01-06 09:39:10,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:10,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 09:39:10,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678059697] [2021-01-06 09:39:10,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 09:39:10,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:10,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 09:39:10,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 09:39:10,818 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand 43 states. [2021-01-06 09:39:11,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:11,002 INFO L93 Difference]: Finished difference Result 336 states and 420 transitions. [2021-01-06 09:39:11,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 09:39:11,002 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 147 [2021-01-06 09:39:11,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:11,004 INFO L225 Difference]: With dead ends: 336 [2021-01-06 09:39:11,004 INFO L226 Difference]: Without dead ends: 210 [2021-01-06 09:39:11,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 09:39:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-01-06 09:39:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-01-06 09:39:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-01-06 09:39:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 251 transitions. [2021-01-06 09:39:11,012 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 251 transitions. Word has length 147 [2021-01-06 09:39:11,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:11,012 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 251 transitions. [2021-01-06 09:39:11,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 09:39:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 251 transitions. [2021-01-06 09:39:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-01-06 09:39:11,013 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:11,014 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:11,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:11,229 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:11,229 INFO L82 PathProgramCache]: Analyzing trace with hash -940523107, now seen corresponding path program 39 times [2021-01-06 09:39:11,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:11,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133701652] [2021-01-06 09:39:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-01-06 09:39:12,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133701652] [2021-01-06 09:39:12,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399104408] [2021-01-06 09:39:12,423 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 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 09:39:12,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-01-06 09:39:12,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:12,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 09:39:12,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 80 proven. 532 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2021-01-06 09:39:14,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:14,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 24] total 65 [2021-01-06 09:39:14,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052820825] [2021-01-06 09:39:14,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 09:39:14,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:14,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 09:39:14,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 09:39:14,124 INFO L87 Difference]: Start difference. First operand 209 states and 251 transitions. Second operand 65 states. [2021-01-06 09:39:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:15,437 INFO L93 Difference]: Finished difference Result 349 states and 440 transitions. [2021-01-06 09:39:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 09:39:15,438 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 149 [2021-01-06 09:39:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:15,439 INFO L225 Difference]: With dead ends: 349 [2021-01-06 09:39:15,439 INFO L226 Difference]: Without dead ends: 223 [2021-01-06 09:39:15,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1680, Invalid=5460, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 09:39:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-01-06 09:39:15,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2021-01-06 09:39:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2021-01-06 09:39:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 263 transitions. [2021-01-06 09:39:15,448 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 263 transitions. Word has length 149 [2021-01-06 09:39:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:15,448 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 263 transitions. [2021-01-06 09:39:15,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 09:39:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 263 transitions. [2021-01-06 09:39:15,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-01-06 09:39:15,449 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:15,449 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:15,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 09:39:15,662 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:15,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1691192489, now seen corresponding path program 40 times [2021-01-06 09:39:15,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:15,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918602737] [2021-01-06 09:39:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-01-06 09:39:16,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918602737] [2021-01-06 09:39:16,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139802530] [2021-01-06 09:39:16,988 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 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 09:39:17,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:39:17,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:39:17,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 1 proven. 590 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2021-01-06 09:39:18,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:18,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 23] total 66 [2021-01-06 09:39:18,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338316752] [2021-01-06 09:39:18,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 09:39:18,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:18,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 09:39:18,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 09:39:18,166 INFO L87 Difference]: Start difference. First operand 219 states and 263 transitions. Second operand 66 states. [2021-01-06 09:39:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:18,614 INFO L93 Difference]: Finished difference Result 364 states and 458 transitions. [2021-01-06 09:39:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 09:39:18,614 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 156 [2021-01-06 09:39:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:18,616 INFO L225 Difference]: With dead ends: 364 [2021-01-06 09:39:18,616 INFO L226 Difference]: Without dead ends: 232 [2021-01-06 09:39:18,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 09:39:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-01-06 09:39:18,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 227. [2021-01-06 09:39:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2021-01-06 09:39:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 273 transitions. [2021-01-06 09:39:18,627 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 273 transitions. Word has length 156 [2021-01-06 09:39:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:18,628 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 273 transitions. [2021-01-06 09:39:18,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 09:39:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 273 transitions. [2021-01-06 09:39:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 09:39:18,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:18,629 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:18,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:18,844 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:18,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:18,845 INFO L82 PathProgramCache]: Analyzing trace with hash -682288297, now seen corresponding path program 41 times [2021-01-06 09:39:18,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:18,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344002046] [2021-01-06 09:39:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-01-06 09:39:20,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344002046] [2021-01-06 09:39:20,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169174505] [2021-01-06 09:39:20,227 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 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 09:40:26,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-01-06 09:40:26,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:40:26,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 09:40:26,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 1 proven. 651 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2021-01-06 09:40:27,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:27,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 24] total 68 [2021-01-06 09:40:27,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678975219] [2021-01-06 09:40:27,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 09:40:27,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:27,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 09:40:27,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1310, Invalid=3246, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 09:40:27,684 INFO L87 Difference]: Start difference. First operand 227 states and 273 transitions. Second operand 68 states. [2021-01-06 09:40:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:28,126 INFO L93 Difference]: Finished difference Result 378 states and 476 transitions. [2021-01-06 09:40:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 09:40:28,126 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 161 [2021-01-06 09:40:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:28,131 INFO L225 Difference]: With dead ends: 378 [2021-01-06 09:40:28,131 INFO L226 Difference]: Without dead ends: 240 [2021-01-06 09:40:28,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1310, Invalid=3246, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 09:40:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-01-06 09:40:28,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2021-01-06 09:40:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2021-01-06 09:40:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2021-01-06 09:40:28,140 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 161 [2021-01-06 09:40:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:28,140 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2021-01-06 09:40:28,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 09:40:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2021-01-06 09:40:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 09:40:28,142 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:28,142 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:28,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:28,357 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:28,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:28,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1050437843, now seen corresponding path program 42 times [2021-01-06 09:40:28,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:28,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142530432] [2021-01-06 09:40:28,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:40:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-01-06 09:40:29,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142530432] [2021-01-06 09:40:29,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936234462] [2021-01-06 09:40:29,897 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 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 09:40:58,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2021-01-06 09:40:58,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:40:58,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:40:58,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2021-01-06 09:40:59,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:59,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 25] total 70 [2021-01-06 09:40:59,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537920391] [2021-01-06 09:40:59,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 09:40:59,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:59,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 09:40:59,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 09:40:59,369 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand 70 states. [2021-01-06 09:40:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:59,757 INFO L93 Difference]: Finished difference Result 392 states and 494 transitions. [2021-01-06 09:40:59,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 09:40:59,758 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 166 [2021-01-06 09:40:59,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:59,760 INFO L225 Difference]: With dead ends: 392 [2021-01-06 09:40:59,761 INFO L226 Difference]: Without dead ends: 248 [2021-01-06 09:40:59,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 09:40:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-01-06 09:40:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 243. [2021-01-06 09:40:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2021-01-06 09:40:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 293 transitions. [2021-01-06 09:40:59,771 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 293 transitions. Word has length 166 [2021-01-06 09:40:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:59,771 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 293 transitions. [2021-01-06 09:40:59,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 09:40:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 293 transitions. [2021-01-06 09:40:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 09:40:59,772 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:59,773 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:59,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 09:40:59,987 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:59,988 INFO L82 PathProgramCache]: Analyzing trace with hash -180945709, now seen corresponding path program 43 times [2021-01-06 09:40:59,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:59,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339354594] [2021-01-06 09:40:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:41:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:41:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-01-06 09:41:01,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339354594] [2021-01-06 09:41:01,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124544420] [2021-01-06 09:41:01,585 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 09:41:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:41:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 09:41:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:41:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-01-06 09:41:01,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:41:01,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 09:41:01,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543814893] [2021-01-06 09:41:01,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 09:41:01,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:41:01,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 09:41:01,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 09:41:01,946 INFO L87 Difference]: Start difference. First operand 243 states and 293 transitions. Second operand 49 states. [2021-01-06 09:41:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:41:02,174 INFO L93 Difference]: Finished difference Result 396 states and 496 transitions. [2021-01-06 09:41:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 09:41:02,175 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2021-01-06 09:41:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:41:02,177 INFO L225 Difference]: With dead ends: 396 [2021-01-06 09:41:02,177 INFO L226 Difference]: Without dead ends: 246 [2021-01-06 09:41:02,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 09:41:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-01-06 09:41:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-01-06 09:41:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2021-01-06 09:41:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 295 transitions. [2021-01-06 09:41:02,185 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 295 transitions. Word has length 171 [2021-01-06 09:41:02,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:41:02,185 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 295 transitions. [2021-01-06 09:41:02,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 09:41:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 295 transitions. [2021-01-06 09:41:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 09:41:02,187 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:41:02,187 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:41:02,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 09:41:02,402 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:41:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:41:02,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1258063215, now seen corresponding path program 44 times [2021-01-06 09:41:02,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:41:02,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175582361] [2021-01-06 09:41:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:41:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:41:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-01-06 09:41:04,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175582361] [2021-01-06 09:41:04,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834990444] [2021-01-06 09:41:04,052 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 09:41:04,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:41:04,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:41:04,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 09:41:04,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:41:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-01-06 09:41:04,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:41:04,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 09:41:04,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550896778] [2021-01-06 09:41:04,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 09:41:04,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:41:04,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 09:41:04,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 09:41:04,444 INFO L87 Difference]: Start difference. First operand 245 states and 295 transitions. Second operand 50 states. [2021-01-06 09:41:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:41:04,657 INFO L93 Difference]: Finished difference Result 398 states and 498 transitions. [2021-01-06 09:41:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 09:41:04,658 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 173 [2021-01-06 09:41:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:41:04,660 INFO L225 Difference]: With dead ends: 398 [2021-01-06 09:41:04,660 INFO L226 Difference]: Without dead ends: 248 [2021-01-06 09:41:04,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 09:41:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-01-06 09:41:04,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2021-01-06 09:41:04,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2021-01-06 09:41:04,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2021-01-06 09:41:04,671 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 173 [2021-01-06 09:41:04,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:41:04,672 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2021-01-06 09:41:04,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 09:41:04,672 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2021-01-06 09:41:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-01-06 09:41:04,673 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:41:04,674 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:41:04,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 09:41:04,890 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:41:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:41:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1280868145, now seen corresponding path program 45 times [2021-01-06 09:41:04,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:41:04,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172024489] [2021-01-06 09:41:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:41:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:41:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-01-06 09:41:06,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172024489] [2021-01-06 09:41:06,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186163843] [2021-01-06 09:41:06,586 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 09:41:08,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-01-06 09:41:08,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:41:08,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 09:41:08,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:41:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 94 proven. 782 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-01-06 09:41:10,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:41:10,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 28] total 76 [2021-01-06 09:41:10,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291018067] [2021-01-06 09:41:10,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 09:41:10,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:41:10,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 09:41:10,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1650, Invalid=4050, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 09:41:10,549 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand 76 states. [2021-01-06 09:41:12,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:41:12,421 INFO L93 Difference]: Finished difference Result 411 states and 518 transitions. [2021-01-06 09:41:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-01-06 09:41:12,421 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 175 [2021-01-06 09:41:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:41:12,423 INFO L225 Difference]: With dead ends: 411 [2021-01-06 09:41:12,423 INFO L226 Difference]: Without dead ends: 261 [2021-01-06 09:41:12,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2298, Invalid=7602, Unknown=0, NotChecked=0, Total=9900 [2021-01-06 09:41:12,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-01-06 09:41:12,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2021-01-06 09:41:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2021-01-06 09:41:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 309 transitions. [2021-01-06 09:41:12,434 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 309 transitions. Word has length 175 [2021-01-06 09:41:12,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:41:12,434 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 309 transitions. [2021-01-06 09:41:12,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 09:41:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 309 transitions. [2021-01-06 09:41:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-01-06 09:41:12,436 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:41:12,436 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:41:12,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:41:12,651 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:41:12,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:41:12,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1237945143, now seen corresponding path program 46 times [2021-01-06 09:41:12,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:41:12,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553274480] [2021-01-06 09:41:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:41:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:41:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2021-01-06 09:41:14,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553274480] [2021-01-06 09:41:14,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795963014] [2021-01-06 09:41:14,575 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 09:41:14,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:41:14,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:41:14,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 09:41:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:41:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2021-01-06 09:41:14,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:41:14,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 09:41:14,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309714732] [2021-01-06 09:41:14,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 09:41:14,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:41:14,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 09:41:14,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 09:41:14,983 INFO L87 Difference]: Start difference. First operand 257 states and 309 transitions. Second operand 53 states. [2021-01-06 09:41:15,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:41:15,239 INFO L93 Difference]: Finished difference Result 416 states and 520 transitions. [2021-01-06 09:41:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 09:41:15,240 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 182 [2021-01-06 09:41:15,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:41:15,244 INFO L225 Difference]: With dead ends: 416 [2021-01-06 09:41:15,244 INFO L226 Difference]: Without dead ends: 260 [2021-01-06 09:41:15,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 09:41:15,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-01-06 09:41:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-01-06 09:41:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2021-01-06 09:41:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 311 transitions. [2021-01-06 09:41:15,255 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 311 transitions. Word has length 182 [2021-01-06 09:41:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:41:15,256 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 311 transitions. [2021-01-06 09:41:15,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 09:41:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 311 transitions. [2021-01-06 09:41:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-01-06 09:41:15,257 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:41:15,258 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:41:15,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 09:41:15,472 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:41:15,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:41:15,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1712695993, now seen corresponding path program 47 times [2021-01-06 09:41:15,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:41:15,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468377125] [2021-01-06 09:41:15,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:41:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:41:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2021-01-06 09:41:17,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468377125] [2021-01-06 09:41:17,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923651738] [2021-01-06 09:41:17,492 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 [2021-01-06 09:41:53,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-01-06 09:41:53,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:41:53,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 09:41:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:41:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1 proven. 852 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2021-01-06 09:41:54,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:41:54,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 27] total 78 [2021-01-06 09:41:54,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955656011] [2021-01-06 09:41:54,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 09:41:54,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:41:54,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 09:41:54,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 09:41:54,855 INFO L87 Difference]: Start difference. First operand 259 states and 311 transitions. Second operand 78 states. [2021-01-06 09:41:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:41:55,448 INFO L93 Difference]: Finished difference Result 428 states and 538 transitions. [2021-01-06 09:41:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 09:41:55,449 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 184 [2021-01-06 09:41:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:41:55,456 INFO L225 Difference]: With dead ends: 428 [2021-01-06 09:41:55,456 INFO L226 Difference]: Without dead ends: 272 [2021-01-06 09:41:55,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 09:41:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-01-06 09:41:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 267. [2021-01-06 09:41:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2021-01-06 09:41:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 321 transitions. [2021-01-06 09:41:55,467 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 321 transitions. Word has length 184 [2021-01-06 09:41:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:41:55,467 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 321 transitions. [2021-01-06 09:41:55,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 09:41:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 321 transitions. [2021-01-06 09:41:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-01-06 09:41:55,469 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:41:55,469 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:41:55,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 09:41:55,670 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:41:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:41:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1136663111, now seen corresponding path program 48 times [2021-01-06 09:41:55,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:41:55,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493058261] [2021-01-06 09:41:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:41:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:41:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2021-01-06 09:41:57,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493058261] [2021-01-06 09:41:57,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346373481] [2021-01-06 09:41:57,877 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true