/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/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:41:45,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:41:45,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:41:45,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:41:45,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:41:45,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:41:45,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:41:45,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:41:45,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:41:45,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:41:45,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:41:45,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:41:45,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:41:45,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:41:45,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:41:45,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:41:45,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:41:45,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:41:45,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:41:45,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:41:45,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:41:45,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:41:45,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:41:45,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:41:45,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:41:45,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:41:45,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:41:45,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:41:45,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:41:45,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:41:45,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:41:45,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:41:45,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:41:45,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:41:45,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:41:45,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:41:45,896 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 16:41:45,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:41:45,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:41:45,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:41:45,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:41:45,963 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:41:45,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:41:45,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:41:45,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:41:45,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:41:45,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:41:45,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:41:45,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:41:45,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:41:45,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:41:45,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:41:45,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:41:45,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:41:45,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:41:45,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:41:45,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:41:45,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:41:45,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:41:45,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:41:45,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:41:45,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:41:45,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:41:46,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:41:46,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:41:46,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:41:46,484 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:41:46,485 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:41:46,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_4.i [2021-01-06 16:41:46,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e43488615/90e5d2bab3364e7685753dd6e58140db/FLAG3788eee6b [2021-01-06 16:41:47,258 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:41:47,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_4.i [2021-01-06 16:41:47,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e43488615/90e5d2bab3364e7685753dd6e58140db/FLAG3788eee6b [2021-01-06 16:41:47,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e43488615/90e5d2bab3364e7685753dd6e58140db [2021-01-06 16:41:47,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:41:47,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:41:47,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:47,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:41:47,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:41:47,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:47" (1/1) ... [2021-01-06 16:41:47,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d48482a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:47, skipping insertion in model container [2021-01-06 16:41:47,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:47" (1/1) ... [2021-01-06 16:41:47,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:41:47,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:41:47,966 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/loop-acceleration/array_4.i[848,861] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~A~0,],[IntegerLiteral[1023]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:41:47,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:47,999 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:41:48,018 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/loop-acceleration/array_4.i[848,861] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4092],StructAccessExpression[IdentifierExpression[~#A~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:41:48,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:48,047 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:41:48,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48 WrapperNode [2021-01-06 16:41:48,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:48,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:48,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:41:48,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:41:48,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48" (1/1) ... [2021-01-06 16:41:48,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48" (1/1) ... [2021-01-06 16:41:48,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:48,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:41:48,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:41:48,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:41:48,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48" (1/1) ... [2021-01-06 16:41:48,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48" (1/1) ... [2021-01-06 16:41:48,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48" (1/1) ... [2021-01-06 16:41:48,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48" (1/1) ... [2021-01-06 16:41:48,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48" (1/1) ... [2021-01-06 16:41:48,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48" (1/1) ... [2021-01-06 16:41:48,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48" (1/1) ... [2021-01-06 16:41:48,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:41:48,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:41:48,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:41:48,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:41:48,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48" (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 16:41:48,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:41:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:41:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:41:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:41:48,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:41:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:41:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:41:48,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:41:48,724 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 16:41:48,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:48 BoogieIcfgContainer [2021-01-06 16:41:48,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:41:48,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:41:48,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:41:48,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:41:48,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:41:47" (1/3) ... [2021-01-06 16:41:48,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa5a264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:48, skipping insertion in model container [2021-01-06 16:41:48,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:48" (2/3) ... [2021-01-06 16:41:48,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa5a264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:48, skipping insertion in model container [2021-01-06 16:41:48,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:48" (3/3) ... [2021-01-06 16:41:48,746 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2021-01-06 16:41:48,755 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:41:48,802 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:41:48,868 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:41:48,903 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:41:48,903 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:41:48,903 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:41:48,904 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:41:48,904 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:41:48,904 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:41:48,904 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:41:48,904 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:41:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 16:41:48,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:41:48,930 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:48,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:48,932 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash 212257263, now seen corresponding path program 1 times [2021-01-06 16:41:48,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:48,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270069027] [2021-01-06 16:41:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:49,155 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 16:41:49,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270069027] [2021-01-06 16:41:49,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:49,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:41:49,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052725069] [2021-01-06 16:41:49,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:41:49,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:49,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:41:49,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:41:49,186 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2021-01-06 16:41:49,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:49,208 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-01-06 16:41:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:41:49,210 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 16:41:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:49,221 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:41:49,221 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:41:49,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:41:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:41:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:41:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:41:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 16:41:49,272 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-01-06 16:41:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:49,273 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 16:41:49,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:41:49,273 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 16:41:49,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:41:49,274 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:49,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:49,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:41:49,275 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:49,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2018512365, now seen corresponding path program 1 times [2021-01-06 16:41:49,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:49,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535779545] [2021-01-06 16:41:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:49,343 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 16:41:49,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535779545] [2021-01-06 16:41:49,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:49,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:41:49,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171435082] [2021-01-06 16:41:49,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:41:49,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:49,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:41:49,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:41:49,353 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2021-01-06 16:41:49,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:49,466 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-01-06 16:41:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:41:49,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 16:41:49,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:49,472 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:41:49,472 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 16:41:49,473 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 16:41:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 16:41:49,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 13. [2021-01-06 16:41:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:41:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 16:41:49,485 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-01-06 16:41:49,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:49,486 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 16:41:49,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:41:49,486 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 16:41:49,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:41:49,487 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:49,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:49,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:41:49,488 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:49,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1562582865, now seen corresponding path program 1 times [2021-01-06 16:41:49,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:49,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741363282] [2021-01-06 16:41:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:49,569 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 16:41:49,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741363282] [2021-01-06 16:41:49,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340148874] [2021-01-06 16:41:49,570 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 16:41:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:49,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:41:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:49,839 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 16:41:49,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:49,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:41:49,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434150104] [2021-01-06 16:41:49,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:41:49,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:49,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:41:49,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:49,853 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2021-01-06 16:41:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:49,925 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-01-06 16:41:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:41:49,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 16:41:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:49,928 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:41:49,928 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:41:49,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:41:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 15. [2021-01-06 16:41:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:41:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 16:41:49,941 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-01-06 16:41:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:49,942 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 16:41:49,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:41:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 16:41:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:41:49,943 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:49,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:50,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:41:50,146 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:50,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1568672497, now seen corresponding path program 2 times [2021-01-06 16:41:50,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:50,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384778626] [2021-01-06 16:41:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:41:50,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384778626] [2021-01-06 16:41:50,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:50,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:41:50,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280610796] [2021-01-06 16:41:50,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:41:50,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:50,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:41:50,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:41:50,236 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2021-01-06 16:41:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:50,279 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 16:41:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:41:50,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 16:41:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:50,282 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:41:50,282 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:41:50,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:41:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 16:41:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:41:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 16:41:50,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-01-06 16:41:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:50,288 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 16:41:50,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:41:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 16:41:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:41:50,289 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:50,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:50,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:41:50,290 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:50,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1430972585, now seen corresponding path program 1 times [2021-01-06 16:41:50,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:50,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545740903] [2021-01-06 16:41:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:41:50,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545740903] [2021-01-06 16:41:50,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496536528] [2021-01-06 16:41:50,397 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 16:41:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:50,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:41:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:50,527 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 16:41:50,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:50,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-01-06 16:41:50,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309736260] [2021-01-06 16:41:50,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:41:50,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:50,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:41:50,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:50,530 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2021-01-06 16:41:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:50,617 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-01-06 16:41:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:41:50,617 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-01-06 16:41:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:50,618 INFO L225 Difference]: With dead ends: 41 [2021-01-06 16:41:50,619 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:41:50,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:41:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:41:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-01-06 16:41:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:41:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-01-06 16:41:50,625 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 16 [2021-01-06 16:41:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:50,626 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-01-06 16:41:50,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:41:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-01-06 16:41:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:41:50,628 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:50,628 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:50,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:50,842 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:50,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:50,844 INFO L82 PathProgramCache]: Analyzing trace with hash 413041625, now seen corresponding path program 2 times [2021-01-06 16:41:50,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:50,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735985022] [2021-01-06 16:41:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:41:50,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735985022] [2021-01-06 16:41:50,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300730712] [2021-01-06 16:41:50,949 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 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 16:41:51,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:51,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:51,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:41:51,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:41:51,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:51,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:41:51,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914611703] [2021-01-06 16:41:51,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:41:51,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:51,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:41:51,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:51,079 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2021-01-06 16:41:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:51,141 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-01-06 16:41:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:41:51,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2021-01-06 16:41:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:51,143 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:41:51,143 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:41:51,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:41:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-01-06 16:41:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:41:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 16:41:51,150 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2021-01-06 16:41:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:51,151 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 16:41:51,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:41:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 16:41:51,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:41:51,152 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:51,152 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:51,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:51,366 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:51,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:51,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1809878309, now seen corresponding path program 3 times [2021-01-06 16:41:51,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:51,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52699701] [2021-01-06 16:41:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:41:51,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52699701] [2021-01-06 16:41:51,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675097347] [2021-01-06 16:41:51,505 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 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 16:41:51,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:41:51,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:51,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:41:51,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:41:51,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:51,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-01-06 16:41:51,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657999471] [2021-01-06 16:41:51,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:41:51,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:51,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:41:51,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:41:51,647 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2021-01-06 16:41:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:51,765 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-01-06 16:41:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:41:51,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2021-01-06 16:41:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:51,767 INFO L225 Difference]: With dead ends: 57 [2021-01-06 16:41:51,767 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 16:41:51,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:41:51,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 16:41:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-01-06 16:41:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:41:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-01-06 16:41:51,774 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 26 [2021-01-06 16:41:51,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:51,775 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-01-06 16:41:51,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:41:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-01-06 16:41:51,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:41:51,776 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:51,777 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:51,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:51,992 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1650799069, now seen corresponding path program 4 times [2021-01-06 16:41:51,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:51,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225979592] [2021-01-06 16:41:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:52,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225979592] [2021-01-06 16:41:52,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668319185] [2021-01-06 16:41:52,166 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 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 16:41:52,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:41:52,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:52,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:41:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:52,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:52,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:41:52,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401079184] [2021-01-06 16:41:52,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:41:52,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:52,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:41:52,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:41:52,304 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 9 states. [2021-01-06 16:41:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:52,407 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-01-06 16:41:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:41:52,408 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2021-01-06 16:41:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:52,409 INFO L225 Difference]: With dead ends: 68 [2021-01-06 16:41:52,409 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:41:52,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:41:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:41:52,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2021-01-06 16:41:52,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:41:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-01-06 16:41:52,417 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2021-01-06 16:41:52,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:52,417 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-01-06 16:41:52,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:41:52,418 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-01-06 16:41:52,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:41:52,419 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:52,419 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:52,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:52,633 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:52,635 INFO L82 PathProgramCache]: Analyzing trace with hash 714131039, now seen corresponding path program 5 times [2021-01-06 16:41:52,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:52,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394337036] [2021-01-06 16:41:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:52,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394337036] [2021-01-06 16:41:52,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088715780] [2021-01-06 16:41:52,741 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 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 16:41:52,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 16:41:52,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:41:52,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:52,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:52,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:41:52,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007419813] [2021-01-06 16:41:52,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:41:52,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:41:52,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:41:52,914 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 10 states. [2021-01-06 16:41:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:53,006 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-01-06 16:41:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:41:53,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2021-01-06 16:41:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:53,008 INFO L225 Difference]: With dead ends: 77 [2021-01-06 16:41:53,009 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 16:41:53,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:41:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 16:41:53,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-01-06 16:41:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:41:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 16:41:53,016 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2021-01-06 16:41:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:53,016 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 16:41:53,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:41:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 16:41:53,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:41:53,018 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:53,018 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:53,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:53,233 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:53,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1775680927, now seen corresponding path program 6 times [2021-01-06 16:41:53,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:53,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055737012] [2021-01-06 16:41:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:53,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055737012] [2021-01-06 16:41:53,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618387614] [2021-01-06 16:41:53,348 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 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 16:41:53,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 16:41:53,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:53,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:41:53,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:53,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:53,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:41:53,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023959497] [2021-01-06 16:41:53,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:41:53,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:53,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:41:53,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:41:53,550 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2021-01-06 16:41:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:53,645 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-01-06 16:41:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:41:53,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2021-01-06 16:41:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:53,647 INFO L225 Difference]: With dead ends: 86 [2021-01-06 16:41:53,647 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:41:53,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 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 16:41:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:41:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2021-01-06 16:41:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:41:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-01-06 16:41:53,655 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-01-06 16:41:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:53,655 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-01-06 16:41:53,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:41:53,655 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-01-06 16:41:53,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:41:53,657 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:53,657 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:53,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:41:53,872 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:53,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2106770915, now seen corresponding path program 7 times [2021-01-06 16:41:53,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:53,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211747406] [2021-01-06 16:41:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:54,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211747406] [2021-01-06 16:41:54,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823777055] [2021-01-06 16:41:54,009 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 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 16:41:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:41:54,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:54,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:54,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:41:54,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915873479] [2021-01-06 16:41:54,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:41:54,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:54,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:41:54,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:41:54,139 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 12 states. [2021-01-06 16:41:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:54,237 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2021-01-06 16:41:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:41:54,237 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2021-01-06 16:41:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:54,238 INFO L225 Difference]: With dead ends: 95 [2021-01-06 16:41:54,238 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 16:41:54,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 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 16:41:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 16:41:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2021-01-06 16:41:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:41:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-01-06 16:41:54,246 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2021-01-06 16:41:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:54,246 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-01-06 16:41:54,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:41:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-01-06 16:41:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:41:54,247 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:54,247 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:54,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 16:41:54,461 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:54,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash 816410853, now seen corresponding path program 8 times [2021-01-06 16:41:54,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:54,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160567253] [2021-01-06 16:41:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:54,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160567253] [2021-01-06 16:41:54,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253491639] [2021-01-06 16:41:54,590 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 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 16:41:54,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:54,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:54,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:41:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:54,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:54,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:41:54,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371975787] [2021-01-06 16:41:54,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:41:54,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:54,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:41:54,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:41:54,821 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 13 states. [2021-01-06 16:41:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:54,940 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2021-01-06 16:41:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:41:54,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2021-01-06 16:41:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:54,944 INFO L225 Difference]: With dead ends: 104 [2021-01-06 16:41:54,944 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 16:41:54,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:41:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 16:41:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 45. [2021-01-06 16:41:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 16:41:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-01-06 16:41:54,966 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2021-01-06 16:41:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:54,967 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-01-06 16:41:54,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:41:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-01-06 16:41:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:41:54,969 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:54,969 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:55,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:55,184 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:55,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:55,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2025939815, now seen corresponding path program 9 times [2021-01-06 16:41:55,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:55,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156602534] [2021-01-06 16:41:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:55,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156602534] [2021-01-06 16:41:55,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22783228] [2021-01-06 16:41:55,350 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 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 16:41:55,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:41:55,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:55,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:41:55,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:41:55,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:55,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-01-06 16:41:55,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946905566] [2021-01-06 16:41:55,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:41:55,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:55,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:41:55,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:41:55,617 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2021-01-06 16:41:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:55,851 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-01-06 16:41:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:41:55,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2021-01-06 16:41:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:55,852 INFO L225 Difference]: With dead ends: 101 [2021-01-06 16:41:55,852 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 16:41:55,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:41:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 16:41:55,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-01-06 16:41:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 16:41:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-01-06 16:41:55,859 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 44 [2021-01-06 16:41:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:55,859 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-01-06 16:41:55,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:41:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-01-06 16:41:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 16:41:55,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:55,861 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:56,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:56,076 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:56,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1562561513, now seen corresponding path program 10 times [2021-01-06 16:41:56,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:56,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653851280] [2021-01-06 16:41:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:41:56,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653851280] [2021-01-06 16:41:56,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838451928] [2021-01-06 16:41:56,290 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 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 16:41:56,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:41:56,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:56,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:41:56,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:41:56,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:56,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:41:56,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827353961] [2021-01-06 16:41:56,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:41:56,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:56,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:41:56,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:41:56,488 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 15 states. [2021-01-06 16:41:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:56,618 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-01-06 16:41:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:41:56,619 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2021-01-06 16:41:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:56,620 INFO L225 Difference]: With dead ends: 116 [2021-01-06 16:41:56,620 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 16:41:56,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:41:56,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 16:41:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-01-06 16:41:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:41:56,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-01-06 16:41:56,626 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2021-01-06 16:41:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:56,627 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-01-06 16:41:56,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:41:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-01-06 16:41:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:41:56,628 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:56,628 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:56,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:41:56,843 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash -100069141, now seen corresponding path program 11 times [2021-01-06 16:41:56,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:56,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940981665] [2021-01-06 16:41:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:41:57,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940981665] [2021-01-06 16:41:57,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662469858] [2021-01-06 16:41:57,029 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 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 16:41:57,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 16:41:57,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:57,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:41:57,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:41:57,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:57,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:41:57,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142498203] [2021-01-06 16:41:57,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:41:57,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:41:57,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:41:57,259 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 16 states. [2021-01-06 16:41:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:57,402 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2021-01-06 16:41:57,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:41:57,403 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2021-01-06 16:41:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:57,404 INFO L225 Difference]: With dead ends: 125 [2021-01-06 16:41:57,404 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 16:41:57,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 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 16:41:57,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 16:41:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2021-01-06 16:41:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 16:41:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-01-06 16:41:57,419 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2021-01-06 16:41:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:57,419 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-01-06 16:41:57,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:41:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-01-06 16:41:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 16:41:57,423 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:57,424 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:57,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:41:57,628 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:57,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:57,629 INFO L82 PathProgramCache]: Analyzing trace with hash -160293523, now seen corresponding path program 12 times [2021-01-06 16:41:57,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:57,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61471577] [2021-01-06 16:41:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:41:57,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61471577] [2021-01-06 16:41:57,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550312178] [2021-01-06 16:41:57,876 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 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 16:41:58,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-01-06 16:41:58,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:58,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:41:58,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:41:58,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:58,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:41:58,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856072045] [2021-01-06 16:41:58,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:41:58,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:58,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:41:58,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:41:58,386 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 17 states. [2021-01-06 16:41:58,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:58,525 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2021-01-06 16:41:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:41:58,526 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2021-01-06 16:41:58,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:58,527 INFO L225 Difference]: With dead ends: 134 [2021-01-06 16:41:58,527 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 16:41:58,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 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 16:41:58,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 16:41:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2021-01-06 16:41:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 16:41:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-01-06 16:41:58,533 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2021-01-06 16:41:58,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:58,534 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-01-06 16:41:58,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:41:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-01-06 16:41:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:41:58,535 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:58,535 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:58,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:41:58,750 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:58,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2093617519, now seen corresponding path program 13 times [2021-01-06 16:41:58,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:58,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850207710] [2021-01-06 16:41:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:41:59,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850207710] [2021-01-06 16:41:59,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598475396] [2021-01-06 16:41:59,009 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 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 16:41:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:59,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:41:59,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:41:59,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:59,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:41:59,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903559987] [2021-01-06 16:41:59,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:41:59,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:59,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:41:59,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:41:59,188 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 18 states. [2021-01-06 16:41:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:59,346 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2021-01-06 16:41:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:41:59,346 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2021-01-06 16:41:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:59,347 INFO L225 Difference]: With dead ends: 143 [2021-01-06 16:41:59,348 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 16:41:59,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 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 16:41:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 16:41:59,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 73. [2021-01-06 16:41:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:41:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-01-06 16:41:59,354 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2021-01-06 16:41:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:59,354 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-01-06 16:41:59,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:41:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-01-06 16:41:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:41:59,355 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:59,356 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:59,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:59,571 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:59,572 INFO L82 PathProgramCache]: Analyzing trace with hash -856355599, now seen corresponding path program 14 times [2021-01-06 16:41:59,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:59,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935370929] [2021-01-06 16:41:59,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:41:59,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935370929] [2021-01-06 16:41:59,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934156240] [2021-01-06 16:41:59,832 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 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 16:41:59,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:59,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:59,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:41:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:42:00,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:00,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:42:00,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769454523] [2021-01-06 16:42:00,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:42:00,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:42:00,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:42:00,034 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 19 states. [2021-01-06 16:42:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:00,208 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2021-01-06 16:42:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:42:00,208 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 72 [2021-01-06 16:42:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:00,210 INFO L225 Difference]: With dead ends: 152 [2021-01-06 16:42:00,210 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 16:42:00,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:42:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 16:42:00,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 75. [2021-01-06 16:42:00,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 16:42:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-01-06 16:42:00,219 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2021-01-06 16:42:00,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:00,220 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-01-06 16:42:00,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:42:00,220 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-01-06 16:42:00,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 16:42:00,221 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:00,221 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:00,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:42:00,435 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:00,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1102106637, now seen corresponding path program 15 times [2021-01-06 16:42:00,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:00,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677618459] [2021-01-06 16:42:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:42:00,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677618459] [2021-01-06 16:42:00,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817138465] [2021-01-06 16:42:00,705 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 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 16:42:00,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 16:42:00,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:00,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:42:00,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:42:01,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:01,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 21 [2021-01-06 16:42:01,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787748885] [2021-01-06 16:42:01,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:42:01,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:01,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:42:01,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:42:01,107 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 21 states. [2021-01-06 16:42:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:01,396 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2021-01-06 16:42:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:42:01,396 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 74 [2021-01-06 16:42:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:01,397 INFO L225 Difference]: With dead ends: 149 [2021-01-06 16:42:01,397 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 16:42:01,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:42:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 16:42:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-01-06 16:42:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 16:42:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-01-06 16:42:01,403 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 74 [2021-01-06 16:42:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:01,403 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-01-06 16:42:01,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:42:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-01-06 16:42:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 16:42:01,404 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:01,404 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:01,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:01,620 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:01,621 INFO L82 PathProgramCache]: Analyzing trace with hash -414712331, now seen corresponding path program 16 times [2021-01-06 16:42:01,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:01,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157438847] [2021-01-06 16:42:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 16:42:01,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157438847] [2021-01-06 16:42:01,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331853213] [2021-01-06 16:42:01,904 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 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 16:42:01,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:42:01,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:01,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:42:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 16:42:02,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:02,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:42:02,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148539916] [2021-01-06 16:42:02,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:42:02,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:02,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:42:02,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:42:02,138 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 21 states. [2021-01-06 16:42:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:02,322 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2021-01-06 16:42:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:42:02,323 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2021-01-06 16:42:02,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:02,324 INFO L225 Difference]: With dead ends: 164 [2021-01-06 16:42:02,324 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 16:42:02,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:42:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 16:42:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2021-01-06 16:42:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 16:42:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-01-06 16:42:02,330 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2021-01-06 16:42:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:02,330 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-01-06 16:42:02,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:42:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-01-06 16:42:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 16:42:02,331 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:02,331 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:02,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:02,547 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:02,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:02,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1433998199, now seen corresponding path program 17 times [2021-01-06 16:42:02,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:02,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2495431] [2021-01-06 16:42:02,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 16:42:02,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2495431] [2021-01-06 16:42:02,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711946983] [2021-01-06 16:42:02,873 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 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 16:42:03,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-06 16:42:03,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:03,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:42:03,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 16:42:03,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:03,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:42:03,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827582124] [2021-01-06 16:42:03,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:42:03,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:03,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:42:03,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:42:03,266 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 22 states. [2021-01-06 16:42:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:03,458 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2021-01-06 16:42:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:42:03,458 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2021-01-06 16:42:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:03,459 INFO L225 Difference]: With dead ends: 173 [2021-01-06 16:42:03,460 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 16:42:03,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:42:03,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 16:42:03,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 99. [2021-01-06 16:42:03,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 16:42:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-01-06 16:42:03,468 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2021-01-06 16:42:03,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:03,470 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-01-06 16:42:03,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:42:03,470 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-01-06 16:42:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 16:42:03,471 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:03,471 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:03,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:42:03,686 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:03,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:03,687 INFO L82 PathProgramCache]: Analyzing trace with hash -71643015, now seen corresponding path program 18 times [2021-01-06 16:42:03,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:03,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634569028] [2021-01-06 16:42:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 16:42:04,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634569028] [2021-01-06 16:42:04,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206485532] [2021-01-06 16:42:04,041 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 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 16:42:05,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-01-06 16:42:05,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:05,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:42:05,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 16:42:05,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:05,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:42:05,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068129320] [2021-01-06 16:42:05,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:42:05,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:05,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:42:05,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:42:05,369 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 23 states. [2021-01-06 16:42:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:05,603 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2021-01-06 16:42:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:42:05,604 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2021-01-06 16:42:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:05,605 INFO L225 Difference]: With dead ends: 182 [2021-01-06 16:42:05,606 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 16:42:05,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 98 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 16:42:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 16:42:05,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2021-01-06 16:42:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 16:42:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-01-06 16:42:05,617 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2021-01-06 16:42:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:05,617 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-01-06 16:42:05,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:42:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-01-06 16:42:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 16:42:05,619 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:05,619 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:05,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:05,835 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:05,836 INFO L82 PathProgramCache]: Analyzing trace with hash 411129083, now seen corresponding path program 19 times [2021-01-06 16:42:05,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:05,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104053083] [2021-01-06 16:42:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 16:42:06,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104053083] [2021-01-06 16:42:06,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059712357] [2021-01-06 16:42:06,299 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 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 16:42:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:06,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:42:06,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 16:42:06,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:06,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:42:06,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098772632] [2021-01-06 16:42:06,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:42:06,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:06,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:42:06,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:42:06,617 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 24 states. [2021-01-06 16:42:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:06,847 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2021-01-06 16:42:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:42:06,848 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 100 [2021-01-06 16:42:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:06,849 INFO L225 Difference]: With dead ends: 191 [2021-01-06 16:42:06,849 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 16:42:06,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 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 16:42:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 16:42:06,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2021-01-06 16:42:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 16:42:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-01-06 16:42:06,855 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2021-01-06 16:42:06,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:06,855 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-01-06 16:42:06,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:42:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-01-06 16:42:06,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 16:42:06,857 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:06,857 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:07,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:42:07,074 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:07,075 INFO L82 PathProgramCache]: Analyzing trace with hash 498647293, now seen corresponding path program 20 times [2021-01-06 16:42:07,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:07,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164114287] [2021-01-06 16:42:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 16:42:07,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164114287] [2021-01-06 16:42:07,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093536990] [2021-01-06 16:42:07,523 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 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 16:42:07,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:42:07,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:07,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:42:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 16:42:07,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:07,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:42:07,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354883363] [2021-01-06 16:42:07,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:42:07,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:07,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:42:07,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:42:07,783 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 25 states. [2021-01-06 16:42:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:08,008 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2021-01-06 16:42:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:42:08,008 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 102 [2021-01-06 16:42:08,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:08,010 INFO L225 Difference]: With dead ends: 200 [2021-01-06 16:42:08,010 INFO L226 Difference]: Without dead ends: 142 [2021-01-06 16:42:08,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:42:08,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-01-06 16:42:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 105. [2021-01-06 16:42:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 16:42:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-01-06 16:42:08,017 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2021-01-06 16:42:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:08,018 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-01-06 16:42:08,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:42:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-01-06 16:42:08,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 16:42:08,019 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:08,020 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:08,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:42:08,235 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:08,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:08,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1295698817, now seen corresponding path program 21 times [2021-01-06 16:42:08,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:08,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379989628] [2021-01-06 16:42:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 16:42:08,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379989628] [2021-01-06 16:42:08,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120980862] [2021-01-06 16:42:08,664 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 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 16:42:09,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 16:42:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:42:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 16:42:09,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:09,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 27 [2021-01-06 16:42:09,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31095369] [2021-01-06 16:42:09,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:42:09,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:42:09,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:42:09,530 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 27 states. [2021-01-06 16:42:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:09,874 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2021-01-06 16:42:09,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:42:09,874 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 104 [2021-01-06 16:42:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:09,875 INFO L225 Difference]: With dead ends: 197 [2021-01-06 16:42:09,876 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 16:42:09,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=675, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:42:09,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 16:42:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-01-06 16:42:09,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 16:42:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-01-06 16:42:09,882 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 104 [2021-01-06 16:42:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:09,883 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-01-06 16:42:09,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:42:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-01-06 16:42:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 16:42:09,884 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:09,884 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:10,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:10,098 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:10,099 INFO L82 PathProgramCache]: Analyzing trace with hash -52983807, now seen corresponding path program 22 times [2021-01-06 16:42:10,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:10,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402755542] [2021-01-06 16:42:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 16:42:10,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402755542] [2021-01-06 16:42:10,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650884164] [2021-01-06 16:42:10,590 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 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 16:42:10,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:42:10,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:10,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:42:10,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 16:42:10,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:10,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:42:10,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320393951] [2021-01-06 16:42:10,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:42:10,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:10,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:42:10,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:42:10,874 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 27 states. [2021-01-06 16:42:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:11,135 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2021-01-06 16:42:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:42:11,135 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 124 [2021-01-06 16:42:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:11,137 INFO L225 Difference]: With dead ends: 212 [2021-01-06 16:42:11,137 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 16:42:11,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:42:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 16:42:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2021-01-06 16:42:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 16:42:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2021-01-06 16:42:11,144 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2021-01-06 16:42:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:11,145 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2021-01-06 16:42:11,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:42:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2021-01-06 16:42:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 16:42:11,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:11,146 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:11,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:42:11,361 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:11,362 INFO L82 PathProgramCache]: Analyzing trace with hash -169112061, now seen corresponding path program 23 times [2021-01-06 16:42:11,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:11,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324178025] [2021-01-06 16:42:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 16:42:11,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324178025] [2021-01-06 16:42:11,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817913562] [2021-01-06 16:42:11,877 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 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 16:42:12,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-01-06 16:42:12,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:42:12,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 16:42:12,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:12,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:42:12,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655314042] [2021-01-06 16:42:12,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:42:12,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:12,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:42:12,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:42:12,488 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 28 states. [2021-01-06 16:42:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:12,747 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2021-01-06 16:42:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:42:12,748 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 126 [2021-01-06 16:42:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:12,749 INFO L225 Difference]: With dead ends: 221 [2021-01-06 16:42:12,749 INFO L226 Difference]: Without dead ends: 145 [2021-01-06 16:42:12,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:42:12,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-06 16:42:12,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 129. [2021-01-06 16:42:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 16:42:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-01-06 16:42:12,755 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2021-01-06 16:42:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:12,756 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-01-06 16:42:12,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:42:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-01-06 16:42:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-01-06 16:42:12,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:12,758 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:12,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:12,973 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:12,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:12,974 INFO L82 PathProgramCache]: Analyzing trace with hash -99214459, now seen corresponding path program 24 times [2021-01-06 16:42:12,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:12,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695617105] [2021-01-06 16:42:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 16:42:13,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695617105] [2021-01-06 16:42:13,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440774014] [2021-01-06 16:42:13,537 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 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 16:42:20,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-01-06 16:42:20,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:20,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:42:20,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 16:42:20,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:20,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:42:20,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875724932] [2021-01-06 16:42:20,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:42:20,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:20,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:42:20,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:42:20,678 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 29 states. [2021-01-06 16:42:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:20,965 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2021-01-06 16:42:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:42:20,966 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 128 [2021-01-06 16:42:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:20,967 INFO L225 Difference]: With dead ends: 230 [2021-01-06 16:42:20,967 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 16:42:20,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 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 16:42:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 16:42:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 131. [2021-01-06 16:42:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 16:42:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-01-06 16:42:20,973 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2021-01-06 16:42:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:20,973 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-01-06 16:42:20,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:42:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-01-06 16:42:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 16:42:20,975 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:20,975 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:21,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:42:21,191 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1647095673, now seen corresponding path program 25 times [2021-01-06 16:42:21,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:21,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621114065] [2021-01-06 16:42:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 16:42:21,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621114065] [2021-01-06 16:42:21,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983850492] [2021-01-06 16:42:21,805 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 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 16:42:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:21,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:42:21,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 16:42:22,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:22,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:42:22,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566287527] [2021-01-06 16:42:22,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:42:22,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:22,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:42:22,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:42:22,074 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 30 states. [2021-01-06 16:42:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:22,369 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2021-01-06 16:42:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:42:22,370 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 130 [2021-01-06 16:42:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:22,371 INFO L225 Difference]: With dead ends: 239 [2021-01-06 16:42:22,371 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 16:42:22,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:42:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 16:42:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 133. [2021-01-06 16:42:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 16:42:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-01-06 16:42:22,377 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2021-01-06 16:42:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:22,378 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-01-06 16:42:22,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:42:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-01-06 16:42:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-01-06 16:42:22,380 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:22,380 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:22,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:42:22,595 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:22,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:22,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1192709385, now seen corresponding path program 26 times [2021-01-06 16:42:22,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:22,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831718228] [2021-01-06 16:42:22,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1534 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 16:42:23,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831718228] [2021-01-06 16:42:23,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279050299] [2021-01-06 16:42:23,199 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 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 16:42:23,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:42:23,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:23,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:42:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1534 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 16:42:23,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:23,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:42:23,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351387726] [2021-01-06 16:42:23,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:42:23,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:23,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:42:23,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:42:23,440 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 31 states. [2021-01-06 16:42:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:23,671 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2021-01-06 16:42:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:42:23,671 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 132 [2021-01-06 16:42:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:23,672 INFO L225 Difference]: With dead ends: 248 [2021-01-06 16:42:23,672 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 16:42:23,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:42:23,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 16:42:23,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 135. [2021-01-06 16:42:23,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-01-06 16:42:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-01-06 16:42:23,679 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2021-01-06 16:42:23,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:23,680 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-01-06 16:42:23,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:42:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-01-06 16:42:23,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-01-06 16:42:23,680 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:23,681 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:23,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:23,895 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:23,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:23,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1353830133, now seen corresponding path program 27 times [2021-01-06 16:42:23,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:23,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71249362] [2021-01-06 16:42:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 16:42:24,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71249362] [2021-01-06 16:42:24,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550685831] [2021-01-06 16:42:24,478 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 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 16:42:25,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-01-06 16:42:25,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:25,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:42:25,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-01-06 16:42:26,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:26,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 33 [2021-01-06 16:42:26,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593047482] [2021-01-06 16:42:26,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:42:26,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:26,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:42:26,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:42:26,189 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 33 states. [2021-01-06 16:42:26,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:26,626 INFO L93 Difference]: Finished difference Result 245 states and 253 transitions. [2021-01-06 16:42:26,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:42:26,626 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 134 [2021-01-06 16:42:26,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:26,628 INFO L225 Difference]: With dead ends: 245 [2021-01-06 16:42:26,628 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 16:42:26,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=552, Invalid=930, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:42:26,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 16:42:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2021-01-06 16:42:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 16:42:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-01-06 16:42:26,635 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 134 [2021-01-06 16:42:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:26,635 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-01-06 16:42:26,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:42:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-01-06 16:42:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 16:42:26,636 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:26,636 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:26,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:26,850 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:26,850 INFO L82 PathProgramCache]: Analyzing trace with hash -355194355, now seen corresponding path program 28 times [2021-01-06 16:42:26,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:26,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794631369] [2021-01-06 16:42:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 16:42:27,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794631369] [2021-01-06 16:42:27,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499284563] [2021-01-06 16:42:27,499 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 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 16:42:27,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:42:27,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:27,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:42:27,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 16:42:27,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:27,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:42:27,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911427828] [2021-01-06 16:42:27,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:42:27,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:27,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:42:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:42:27,765 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 33 states. [2021-01-06 16:42:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:28,032 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2021-01-06 16:42:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:42:28,032 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 154 [2021-01-06 16:42:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:28,033 INFO L225 Difference]: With dead ends: 260 [2021-01-06 16:42:28,033 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 16:42:28,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:42:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 16:42:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2021-01-06 16:42:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 16:42:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-01-06 16:42:28,039 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2021-01-06 16:42:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:28,039 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-01-06 16:42:28,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:42:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-01-06 16:42:28,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-01-06 16:42:28,040 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:28,041 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:28,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 16:42:28,255 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1735082127, now seen corresponding path program 29 times [2021-01-06 16:42:28,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:28,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927012631] [2021-01-06 16:42:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 16:42:28,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927012631] [2021-01-06 16:42:28,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968038867] [2021-01-06 16:42:28,907 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 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 16:42:29,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-01-06 16:42:29,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:29,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:42:29,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 16:42:29,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:29,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:42:29,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052901085] [2021-01-06 16:42:29,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:42:29,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:29,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:42:29,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:42:29,938 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 34 states. [2021-01-06 16:42:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:30,217 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2021-01-06 16:42:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:42:30,218 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 156 [2021-01-06 16:42:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:30,219 INFO L225 Difference]: With dead ends: 269 [2021-01-06 16:42:30,219 INFO L226 Difference]: Without dead ends: 175 [2021-01-06 16:42:30,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:42:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-01-06 16:42:30,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 159. [2021-01-06 16:42:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 16:42:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-01-06 16:42:30,227 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2021-01-06 16:42:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:30,227 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-01-06 16:42:30,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:42:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-01-06 16:42:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 16:42:30,228 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:30,228 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:30,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:30,442 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:30,443 INFO L82 PathProgramCache]: Analyzing trace with hash 446086801, now seen corresponding path program 30 times [2021-01-06 16:42:30,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:30,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001298056] [2021-01-06 16:42:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 16:42:31,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001298056] [2021-01-06 16:42:31,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241267575] [2021-01-06 16:42:31,166 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 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 16:42:49,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-01-06 16:42:49,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:49,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:42:49,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 16:42:49,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:49,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:42:49,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855014087] [2021-01-06 16:42:49,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:42:49,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:49,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:42:49,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:42:49,456 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 35 states. [2021-01-06 16:42:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:49,765 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2021-01-06 16:42:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:42:49,766 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 158 [2021-01-06 16:42:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:49,767 INFO L225 Difference]: With dead ends: 278 [2021-01-06 16:42:49,767 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 16:42:49,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:42:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 16:42:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 161. [2021-01-06 16:42:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 16:42:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-01-06 16:42:49,772 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2021-01-06 16:42:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:49,772 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-01-06 16:42:49,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:42:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-01-06 16:42:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-01-06 16:42:49,773 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:49,773 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:49,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 16:42:49,989 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:49,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1327840237, now seen corresponding path program 31 times [2021-01-06 16:42:49,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:49,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259829120] [2021-01-06 16:42:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 16:42:50,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259829120] [2021-01-06 16:42:50,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937612241] [2021-01-06 16:42:50,772 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 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 16:42:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:50,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:42:50,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 16:42:51,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:51,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:42:51,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601255475] [2021-01-06 16:42:51,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:42:51,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:51,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:42:51,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:42:51,045 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 36 states. [2021-01-06 16:42:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:51,364 INFO L93 Difference]: Finished difference Result 287 states and 289 transitions. [2021-01-06 16:42:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:42:51,364 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 160 [2021-01-06 16:42:51,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:51,366 INFO L225 Difference]: With dead ends: 287 [2021-01-06 16:42:51,366 INFO L226 Difference]: Without dead ends: 193 [2021-01-06 16:42:51,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 160 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 16:42:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-01-06 16:42:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 163. [2021-01-06 16:42:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-01-06 16:42:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2021-01-06 16:42:51,371 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2021-01-06 16:42:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:51,371 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2021-01-06 16:42:51,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:42:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2021-01-06 16:42:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-01-06 16:42:51,372 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:51,372 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:51,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:42:51,587 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:51,588 INFO L82 PathProgramCache]: Analyzing trace with hash -969707243, now seen corresponding path program 32 times [2021-01-06 16:42:51,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:51,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859533510] [2021-01-06 16:42:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 16:42:52,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859533510] [2021-01-06 16:42:52,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336939817] [2021-01-06 16:42:52,390 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 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 16:42:52,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:42:52,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:52,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:42:52,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 16:42:52,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:52,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:42:52,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416522085] [2021-01-06 16:42:52,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:42:52,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:52,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:42:52,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:42:52,690 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 37 states. [2021-01-06 16:42:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:53,033 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2021-01-06 16:42:53,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:42:53,033 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 162 [2021-01-06 16:42:53,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:53,038 INFO L225 Difference]: With dead ends: 296 [2021-01-06 16:42:53,038 INFO L226 Difference]: Without dead ends: 202 [2021-01-06 16:42:53,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:42:53,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-01-06 16:42:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 165. [2021-01-06 16:42:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 16:42:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-01-06 16:42:53,045 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2021-01-06 16:42:53,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:53,045 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-01-06 16:42:53,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:42:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-01-06 16:42:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-01-06 16:42:53,047 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:53,047 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:53,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 16:42:53,262 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:53,262 INFO L82 PathProgramCache]: Analyzing trace with hash -401283689, now seen corresponding path program 33 times [2021-01-06 16:42:53,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:53,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928501736] [2021-01-06 16:42:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 16:42:54,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928501736] [2021-01-06 16:42:54,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750694420] [2021-01-06 16:42:54,148 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 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 16:42:58,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-01-06 16:42:58,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:58,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:42:58,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-01-06 16:42:58,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:58,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 33] total 39 [2021-01-06 16:42:58,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263810676] [2021-01-06 16:42:58,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:42:58,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:58,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:42:58,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:42:58,977 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 39 states. [2021-01-06 16:42:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:59,482 INFO L93 Difference]: Finished difference Result 293 states and 301 transitions. [2021-01-06 16:42:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:42:59,483 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 164 [2021-01-06 16:42:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:59,484 INFO L225 Difference]: With dead ends: 293 [2021-01-06 16:42:59,484 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 16:42:59,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:42:59,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 16:42:59,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-01-06 16:42:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 16:42:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-01-06 16:42:59,491 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 164 [2021-01-06 16:42:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:59,491 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-01-06 16:42:59,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:42:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-01-06 16:42:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-01-06 16:42:59,492 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:59,493 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:59,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:42:59,707 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1690262503, now seen corresponding path program 34 times [2021-01-06 16:42:59,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:59,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197123564] [2021-01-06 16:42:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-01-06 16:43:00,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197123564] [2021-01-06 16:43:00,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288658615] [2021-01-06 16:43:00,505 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 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 16:43:00,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:43:00,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:00,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:43:00,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-01-06 16:43:00,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:00,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:43:00,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395517339] [2021-01-06 16:43:00,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:43:00,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:00,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:43:00,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:43:00,829 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 39 states. [2021-01-06 16:43:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:01,131 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2021-01-06 16:43:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:43:01,132 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 184 [2021-01-06 16:43:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:01,133 INFO L225 Difference]: With dead ends: 308 [2021-01-06 16:43:01,133 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 16:43:01,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:43:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 16:43:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 187. [2021-01-06 16:43:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 16:43:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2021-01-06 16:43:01,139 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2021-01-06 16:43:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:01,139 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2021-01-06 16:43:01,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:43:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2021-01-06 16:43:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-01-06 16:43:01,140 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:01,140 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:01,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:43:01,353 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:01,353 INFO L82 PathProgramCache]: Analyzing trace with hash -721229029, now seen corresponding path program 35 times [2021-01-06 16:43:01,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:01,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530042655] [2021-01-06 16:43:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-01-06 16:43:02,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530042655] [2021-01-06 16:43:02,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237397732] [2021-01-06 16:43:02,345 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 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 16:43:03,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-01-06 16:43:03,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:43:03,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-01-06 16:43:03,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:03,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:43:03,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809046444] [2021-01-06 16:43:03,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:43:03,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:03,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:43:03,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:43:03,928 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 40 states. [2021-01-06 16:43:04,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:04,288 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2021-01-06 16:43:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:43:04,289 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 186 [2021-01-06 16:43:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:04,290 INFO L225 Difference]: With dead ends: 317 [2021-01-06 16:43:04,290 INFO L226 Difference]: Without dead ends: 205 [2021-01-06 16:43:04,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:43:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-01-06 16:43:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 189. [2021-01-06 16:43:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-01-06 16:43:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-01-06 16:43:04,297 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2021-01-06 16:43:04,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:04,297 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-01-06 16:43:04,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:43:04,297 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-01-06 16:43:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-01-06 16:43:04,298 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:04,299 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:04,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:43:04,512 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:04,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:04,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1487963747, now seen corresponding path program 36 times [2021-01-06 16:43:04,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:04,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188422721] [2021-01-06 16:43:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3224 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-01-06 16:43:05,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188422721] [2021-01-06 16:43:05,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210324427] [2021-01-06 16:43:05,435 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 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 16:43:30,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2021-01-06 16:43:30,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:30,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:43:30,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3224 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-01-06 16:43:30,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:30,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 42 [2021-01-06 16:43:30,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674892091] [2021-01-06 16:43:30,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:43:30,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:30,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:43:30,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:43:30,450 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 42 states. [2021-01-06 16:43:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:30,849 INFO L93 Difference]: Finished difference Result 320 states and 325 transitions. [2021-01-06 16:43:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:43:30,850 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 188 [2021-01-06 16:43:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:30,851 INFO L225 Difference]: With dead ends: 320 [2021-01-06 16:43:30,851 INFO L226 Difference]: Without dead ends: 202 [2021-01-06 16:43:30,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=840, Invalid=1140, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:43:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-01-06 16:43:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-01-06 16:43:30,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2021-01-06 16:43:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2021-01-06 16:43:30,857 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 188 [2021-01-06 16:43:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:30,857 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2021-01-06 16:43:30,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:43:30,857 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2021-01-06 16:43:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-01-06 16:43:30,858 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:30,858 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:31,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:43:31,072 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:31,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1448092615, now seen corresponding path program 37 times [2021-01-06 16:43:31,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:31,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164242469] [2021-01-06 16:43:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-01-06 16:43:32,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164242469] [2021-01-06 16:43:32,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372456152] [2021-01-06 16:43:32,027 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 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 16:43:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:32,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:43:32,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-01-06 16:43:32,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:32,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:43:32,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489480612] [2021-01-06 16:43:32,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:43:32,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:32,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:43:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:43:32,377 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand 42 states. [2021-01-06 16:43:32,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:32,774 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2021-01-06 16:43:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:43:32,775 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 199 [2021-01-06 16:43:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:32,776 INFO L225 Difference]: With dead ends: 332 [2021-01-06 16:43:32,776 INFO L226 Difference]: Without dead ends: 211 [2021-01-06 16:43:32,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:43:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-01-06 16:43:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2021-01-06 16:43:32,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 16:43:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2021-01-06 16:43:32,783 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 199 [2021-01-06 16:43:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:32,783 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2021-01-06 16:43:32,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:43:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2021-01-06 16:43:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-01-06 16:43:32,784 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:32,784 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:32,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:32,999 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:32,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:32,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1476049029, now seen corresponding path program 38 times [2021-01-06 16:43:33,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:33,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399075272] [2021-01-06 16:43:33,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3706 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-01-06 16:43:34,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399075272] [2021-01-06 16:43:34,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312545849] [2021-01-06 16:43:34,126 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 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 16:43:34,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:43:34,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:34,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:43:34,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3706 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-01-06 16:43:34,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:34,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:43:34,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169988702] [2021-01-06 16:43:34,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:43:34,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:34,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:43:34,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:43:34,476 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 43 states. [2021-01-06 16:43:34,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:34,811 INFO L93 Difference]: Finished difference Result 341 states and 343 transitions. [2021-01-06 16:43:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:43:34,812 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 201 [2021-01-06 16:43:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:34,814 INFO L225 Difference]: With dead ends: 341 [2021-01-06 16:43:34,814 INFO L226 Difference]: Without dead ends: 220 [2021-01-06 16:43:34,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:43:34,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-01-06 16:43:34,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 204. [2021-01-06 16:43:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2021-01-06 16:43:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2021-01-06 16:43:34,821 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2021-01-06 16:43:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:34,822 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2021-01-06 16:43:34,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:43:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2021-01-06 16:43:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-01-06 16:43:34,823 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:34,823 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:35,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:35,024 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:35,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1722608189, now seen corresponding path program 39 times [2021-01-06 16:43:35,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:35,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877874590] [2021-01-06 16:43:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-01-06 16:43:36,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877874590] [2021-01-06 16:43:36,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158771151] [2021-01-06 16:43:36,200 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 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 16:44:18,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-01-06 16:44:18,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:18,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:44:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-01-06 16:44:18,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:18,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 45 [2021-01-06 16:44:18,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876616015] [2021-01-06 16:44:18,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:44:18,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:18,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:44:18,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:44:18,473 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 45 states. [2021-01-06 16:44:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:18,934 INFO L93 Difference]: Finished difference Result 344 states and 349 transitions. [2021-01-06 16:44:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:44:18,934 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 203 [2021-01-06 16:44:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:18,936 INFO L225 Difference]: With dead ends: 344 [2021-01-06 16:44:18,936 INFO L226 Difference]: Without dead ends: 217 [2021-01-06 16:44:18,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=966, Invalid=1290, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:44:18,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-01-06 16:44:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2021-01-06 16:44:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2021-01-06 16:44:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2021-01-06 16:44:18,942 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 203 [2021-01-06 16:44:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:18,943 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2021-01-06 16:44:18,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:44:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2021-01-06 16:44:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-01-06 16:44:18,944 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:18,944 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:19,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:19,159 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:19,160 INFO L82 PathProgramCache]: Analyzing trace with hash -518015451, now seen corresponding path program 40 times [2021-01-06 16:44:19,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:19,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050995800] [2021-01-06 16:44:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-01-06 16:44:20,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050995800] [2021-01-06 16:44:20,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229524288] [2021-01-06 16:44:20,385 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 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 16:44:20,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:44:20,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:20,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:44:20,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-01-06 16:44:20,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:20,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:44:20,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014936906] [2021-01-06 16:44:20,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:44:20,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:20,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:44:20,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:44:20,767 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 45 states. [2021-01-06 16:44:21,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:21,146 INFO L93 Difference]: Finished difference Result 356 states and 358 transitions. [2021-01-06 16:44:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:44:21,147 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 214 [2021-01-06 16:44:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:21,148 INFO L225 Difference]: With dead ends: 356 [2021-01-06 16:44:21,148 INFO L226 Difference]: Without dead ends: 226 [2021-01-06 16:44:21,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:44:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-01-06 16:44:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 217. [2021-01-06 16:44:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 16:44:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2021-01-06 16:44:21,155 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 214 [2021-01-06 16:44:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:21,155 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2021-01-06 16:44:21,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:44:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2021-01-06 16:44:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-01-06 16:44:21,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:21,157 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:21,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 16:44:21,371 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:21,371 INFO L82 PathProgramCache]: Analyzing trace with hash -725791321, now seen corresponding path program 41 times [2021-01-06 16:44:21,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:21,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897091256] [2021-01-06 16:44:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4306 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-01-06 16:44:22,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897091256] [2021-01-06 16:44:22,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903366269] [2021-01-06 16:44:22,689 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 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 16:44:40,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-01-06 16:44:40,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:40,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:44:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4306 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-01-06 16:44:40,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:40,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 16:44:40,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262784560] [2021-01-06 16:44:40,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:44:40,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:40,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:44:40,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:44:40,341 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 46 states. [2021-01-06 16:44:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:40,712 INFO L93 Difference]: Finished difference Result 365 states and 367 transitions. [2021-01-06 16:44:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:44:40,719 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 216 [2021-01-06 16:44:40,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:40,721 INFO L225 Difference]: With dead ends: 365 [2021-01-06 16:44:40,721 INFO L226 Difference]: Without dead ends: 235 [2021-01-06 16:44:40,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:44:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-01-06 16:44:40,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 219. [2021-01-06 16:44:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2021-01-06 16:44:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2021-01-06 16:44:40,727 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2021-01-06 16:44:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:40,727 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2021-01-06 16:44:40,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:44:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2021-01-06 16:44:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-01-06 16:44:40,728 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:40,729 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:40,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:40,944 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1465060521, now seen corresponding path program 42 times [2021-01-06 16:44:40,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:40,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724501307] [2021-01-06 16:44:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-01-06 16:44:42,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724501307] [2021-01-06 16:44:42,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170533556] [2021-01-06 16:44:42,348 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 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