/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_reverse_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:56:59,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:56:59,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:56:59,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:56:59,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:56:59,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:56:59,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:56:59,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:57:00,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:57:00,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:57:00,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:57:00,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:57:00,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:57:00,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:57:00,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:57:00,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:57:00,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:57:00,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:57:00,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:57:00,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:57:00,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:57:00,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:57:00,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:57:00,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:57:00,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:57:00,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:57:00,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:57:00,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:57:00,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:57:00,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:57:00,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:57:00,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:57:00,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:57:00,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:57:00,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:57:00,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:57:00,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:57:00,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:57:00,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:57:00,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:57:00,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:57:00,151 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:57:00,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:57:00,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:57:00,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:57:00,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:57:00,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:57:00,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:57:00,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:57:00,154 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:57:00,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:57:00,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:57:00,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:57:00,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:57:00,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:57:00,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:57:00,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:57:00,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:57:00,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:57:00,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:57:00,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:57:00,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:57:00,157 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:57:00,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:57:00,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:57:00,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:57:00,618 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:57:00,619 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:57:00,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_reverse_ground.i [2021-01-06 09:57:00,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7f7fad7da/c2d1906f532a44118c130e0aa97628cb/FLAG40895b442 [2021-01-06 09:57:01,209 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:57:01,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2021-01-06 09:57:01,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7f7fad7da/c2d1906f532a44118c130e0aa97628cb/FLAG40895b442 [2021-01-06 09:57:01,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7f7fad7da/c2d1906f532a44118c130e0aa97628cb [2021-01-06 09:57:01,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:57:01,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:57:01,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:57:01,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:57:01,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:57:01,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:57:01" (1/1) ... [2021-01-06 09:57:01,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7243f5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01, skipping insertion in model container [2021-01-06 09:57:01,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:57:01" (1/1) ... [2021-01-06 09:57:01,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:57:01,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:57:01,857 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] 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: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:57:01,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:57:01,896 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:57:01,911 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] 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: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:57:01,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:57:01,955 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:57:01,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01 WrapperNode [2021-01-06 09:57:01,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:57:01,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:57:01,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:57:01,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:57:01,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01" (1/1) ... [2021-01-06 09:57:01,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01" (1/1) ... [2021-01-06 09:57:01,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:57:01,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:57:01,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:57:01,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:57:02,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01" (1/1) ... [2021-01-06 09:57:02,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01" (1/1) ... [2021-01-06 09:57:02,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01" (1/1) ... [2021-01-06 09:57:02,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01" (1/1) ... [2021-01-06 09:57:02,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01" (1/1) ... [2021-01-06 09:57:02,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01" (1/1) ... [2021-01-06 09:57:02,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01" (1/1) ... [2021-01-06 09:57:02,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:57:02,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:57:02,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:57:02,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:57:02,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:57:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:57:02,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:57:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:57:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:57:02,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:57:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:57:02,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:57:02,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:57:02,485 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 09:57:02,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:57:02 BoogieIcfgContainer [2021-01-06 09:57:02,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:57:02,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:57:02,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:57:02,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:57:02,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:57:01" (1/3) ... [2021-01-06 09:57:02,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbf3944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:57:02, skipping insertion in model container [2021-01-06 09:57:02,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:01" (2/3) ... [2021-01-06 09:57:02,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbf3944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:57:02, skipping insertion in model container [2021-01-06 09:57:02,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:57:02" (3/3) ... [2021-01-06 09:57:02,513 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2021-01-06 09:57:02,535 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:57:02,545 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:57:02,593 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:57:02,645 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:57:02,645 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:57:02,645 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:57:02,646 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:57:02,646 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:57:02,646 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:57:02,646 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:57:02,646 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:57:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 09:57:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:57:02,668 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:02,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:02,669 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2021-01-06 09:57:02,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:02,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021832285] [2021-01-06 09:57:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:57:02,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021832285] [2021-01-06 09:57:02,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:57:02,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:57:02,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511170413] [2021-01-06 09:57:02,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:57:02,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:02,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:57:02,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:57:02,898 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-01-06 09:57:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:02,938 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-01-06 09:57:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:57:02,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 09:57:02,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:02,948 INFO L225 Difference]: With dead ends: 36 [2021-01-06 09:57:02,948 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 09:57:02,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:57:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 09:57:02,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-01-06 09:57:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 09:57:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 09:57:02,983 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-01-06 09:57:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:02,983 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 09:57:02,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:57:02,984 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 09:57:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 09:57:02,984 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:02,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:02,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:57:02,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:02,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:02,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2021-01-06 09:57:02,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:02,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780732239] [2021-01-06 09:57:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:57:03,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780732239] [2021-01-06 09:57:03,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876263333] [2021-01-06 09:57:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:03,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:57:03,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:57:03,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:03,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:57:03,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946297506] [2021-01-06 09:57:03,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:57:03,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:03,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:57:03,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:57:03,192 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2021-01-06 09:57:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:03,233 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-01-06 09:57:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:57:03,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 09:57:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:03,235 INFO L225 Difference]: With dead ends: 33 [2021-01-06 09:57:03,235 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 09:57:03,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:57:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 09:57:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-01-06 09:57:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 09:57:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 09:57:03,242 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2021-01-06 09:57:03,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:03,242 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 09:57:03,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:57:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 09:57:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 09:57:03,243 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:03,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:03,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:57:03,458 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:03,459 INFO L82 PathProgramCache]: Analyzing trace with hash -799235507, now seen corresponding path program 2 times [2021-01-06 09:57:03,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:03,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744246633] [2021-01-06 09:57:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:57:03,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744246633] [2021-01-06 09:57:03,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462799534] [2021-01-06 09:57:03,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:03,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:03,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:03,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:57:03,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:57:03,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:03,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:57:03,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013398628] [2021-01-06 09:57:03,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:57:03,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:03,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:57:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:57:03,703 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2021-01-06 09:57:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:03,743 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-01-06 09:57:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:57:03,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 09:57:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:03,744 INFO L225 Difference]: With dead ends: 39 [2021-01-06 09:57:03,745 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 09:57:03,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:57:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 09:57:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-01-06 09:57:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:57:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 09:57:03,751 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2021-01-06 09:57:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:03,751 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 09:57:03,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:57:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 09:57:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:57:03,752 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:03,752 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:03,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:03,966 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1303246583, now seen corresponding path program 3 times [2021-01-06 09:57:03,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:03,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000231960] [2021-01-06 09:57:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:57:04,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000231960] [2021-01-06 09:57:04,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305710349] [2021-01-06 09:57:04,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:04,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:57:04,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:04,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 09:57:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:04,136 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 09:57:04,139 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:04,145 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:04,147 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:04,147 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2021-01-06 09:57:04,194 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-01-06 09:57:04,196 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:04,206 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:04,207 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:04,207 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-01-06 09:57:04,420 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:04,426 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:04,428 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:04,435 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 09:57:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 09:57:04,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:57:04,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2021-01-06 09:57:04,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549035908] [2021-01-06 09:57:04,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:57:04,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:04,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:57:04,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:57:04,460 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2021-01-06 09:57:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:04,696 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-01-06 09:57:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:57:04,697 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-01-06 09:57:04,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:04,698 INFO L225 Difference]: With dead ends: 31 [2021-01-06 09:57:04,698 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 09:57:04,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:57:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 09:57:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-01-06 09:57:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 09:57:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-01-06 09:57:04,705 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2021-01-06 09:57:04,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:04,706 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-01-06 09:57:04,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:57:04,706 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-01-06 09:57:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 09:57:04,707 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:04,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:04,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:04,909 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:04,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:04,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1047897217, now seen corresponding path program 1 times [2021-01-06 09:57:04,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:04,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391556991] [2021-01-06 09:57:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 09:57:04,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391556991] [2021-01-06 09:57:04,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930173874] [2021-01-06 09:57:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:05,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:57:05,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 09:57:05,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:05,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:57:05,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569464794] [2021-01-06 09:57:05,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:57:05,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:05,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:57:05,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:57:05,063 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2021-01-06 09:57:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:05,121 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-01-06 09:57:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:57:05,121 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2021-01-06 09:57:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:05,122 INFO L225 Difference]: With dead ends: 49 [2021-01-06 09:57:05,122 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:57:05,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 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 09:57:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:57:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-01-06 09:57:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 09:57:05,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 09:57:05,130 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2021-01-06 09:57:05,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:05,130 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 09:57:05,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:57:05,130 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 09:57:05,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:57:05,131 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:05,131 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:05,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:05,346 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1217410619, now seen corresponding path program 2 times [2021-01-06 09:57:05,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:05,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21950904] [2021-01-06 09:57:05,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:57:05,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21950904] [2021-01-06 09:57:05,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017223857] [2021-01-06 09:57:05,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:05,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:05,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:57:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:57:05,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:05,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:57:05,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327466012] [2021-01-06 09:57:05,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:57:05,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:05,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:57:05,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:57:05,521 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2021-01-06 09:57:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:05,576 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-01-06 09:57:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:57:05,577 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2021-01-06 09:57:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:05,578 INFO L225 Difference]: With dead ends: 55 [2021-01-06 09:57:05,578 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 09:57:05,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:57:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 09:57:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-01-06 09:57:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:57:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-01-06 09:57:05,586 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2021-01-06 09:57:05,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:05,586 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-01-06 09:57:05,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:57:05,586 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-01-06 09:57:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:57:05,587 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:05,587 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:05,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:57:05,802 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:05,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2121579785, now seen corresponding path program 3 times [2021-01-06 09:57:05,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:05,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917644575] [2021-01-06 09:57:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 09:57:05,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917644575] [2021-01-06 09:57:05,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046438231] [2021-01-06 09:57:05,881 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:05,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 09:57:05,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:05,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 09:57:05,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:06,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 09:57:06,008 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:06,010 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:06,010 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:06,010 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2021-01-06 09:57:06,037 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-01-06 09:57:06,039 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:06,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:06,044 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:06,044 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2021-01-06 09:57:06,093 INFO L348 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2021-01-06 09:57:06,093 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 51 [2021-01-06 09:57:06,096 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:06,105 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:06,106 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:06,106 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2021-01-06 09:57:06,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:06,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:06,399 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 09:57:06,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 09:57:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-01-06 09:57:06,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:06,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-01-06 09:57:06,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006073235] [2021-01-06 09:57:06,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:57:06,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:06,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:57:06,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:57:06,436 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 18 states. [2021-01-06 09:57:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:07,513 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-01-06 09:57:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 09:57:07,514 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2021-01-06 09:57:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:07,515 INFO L225 Difference]: With dead ends: 68 [2021-01-06 09:57:07,515 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 09:57:07,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 09:57:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 09:57:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-01-06 09:57:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 09:57:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-01-06 09:57:07,526 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2021-01-06 09:57:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:07,526 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-01-06 09:57:07,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:57:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-01-06 09:57:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:57:07,527 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:07,528 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:07,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:07,743 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:07,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:07,745 INFO L82 PathProgramCache]: Analyzing trace with hash 967733033, now seen corresponding path program 4 times [2021-01-06 09:57:07,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:07,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809287832] [2021-01-06 09:57:07,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-01-06 09:57:07,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809287832] [2021-01-06 09:57:07,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599842442] [2021-01-06 09:57:07,887 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:07,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:57:07,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:07,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:57:07,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-01-06 09:57:08,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:08,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:57:08,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558053566] [2021-01-06 09:57:08,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:57:08,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:57:08,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:57:08,029 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 10 states. [2021-01-06 09:57:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:08,110 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2021-01-06 09:57:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:57:08,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2021-01-06 09:57:08,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:08,113 INFO L225 Difference]: With dead ends: 75 [2021-01-06 09:57:08,113 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 09:57:08,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 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 09:57:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 09:57:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-01-06 09:57:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 09:57:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-01-06 09:57:08,134 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2021-01-06 09:57:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:08,136 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-01-06 09:57:08,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:57:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-01-06 09:57:08,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 09:57:08,140 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:08,140 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:08,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:08,354 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:08,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:08,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1132060187, now seen corresponding path program 5 times [2021-01-06 09:57:08,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:08,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564585943] [2021-01-06 09:57:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 09:57:08,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564585943] [2021-01-06 09:57:08,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480741023] [2021-01-06 09:57:08,453 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:08,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 09:57:08,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:08,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:57:08,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 09:57:08,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:08,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:57:08,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361237620] [2021-01-06 09:57:08,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:57:08,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:08,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:57:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:57:08,826 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2021-01-06 09:57:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:08,908 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-01-06 09:57:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:57:08,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2021-01-06 09:57:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:08,909 INFO L225 Difference]: With dead ends: 81 [2021-01-06 09:57:08,909 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 09:57:08,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:57:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 09:57:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-01-06 09:57:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 09:57:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-01-06 09:57:08,932 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2021-01-06 09:57:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:08,933 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-01-06 09:57:08,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:57:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-01-06 09:57:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 09:57:08,938 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:08,938 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:09,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:57:09,140 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash 775620257, now seen corresponding path program 6 times [2021-01-06 09:57:09,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:09,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877076063] [2021-01-06 09:57:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:57:09,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877076063] [2021-01-06 09:57:09,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114536809] [2021-01-06 09:57:09,280 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:09,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 09:57:09,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:09,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:57:09,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:57:09,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:09,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:57:09,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508433696] [2021-01-06 09:57:09,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:57:09,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:09,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:57:09,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:57:09,699 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 12 states. [2021-01-06 09:57:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:09,803 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-01-06 09:57:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:57:09,804 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2021-01-06 09:57:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:09,805 INFO L225 Difference]: With dead ends: 87 [2021-01-06 09:57:09,805 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:57:09,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:57:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:57:09,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-01-06 09:57:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 09:57:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-01-06 09:57:09,814 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2021-01-06 09:57:09,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:09,814 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-01-06 09:57:09,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:57:09,814 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-01-06 09:57:09,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:57:09,815 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:09,815 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:10,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:10,029 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:10,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1634213213, now seen corresponding path program 7 times [2021-01-06 09:57:10,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:10,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434160806] [2021-01-06 09:57:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-01-06 09:57:10,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434160806] [2021-01-06 09:57:10,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561032274] [2021-01-06 09:57:10,171 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:57:10,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-01-06 09:57:10,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:10,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:57:10,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228045092] [2021-01-06 09:57:10,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:57:10,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:10,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:57:10,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:57:10,309 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 13 states. [2021-01-06 09:57:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:10,405 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-01-06 09:57:10,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:57:10,405 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2021-01-06 09:57:10,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:10,406 INFO L225 Difference]: With dead ends: 93 [2021-01-06 09:57:10,406 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 09:57:10,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 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 09:57:10,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 09:57:10,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-01-06 09:57:10,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 09:57:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-01-06 09:57:10,415 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2021-01-06 09:57:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:10,416 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-01-06 09:57:10,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:57:10,416 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-01-06 09:57:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 09:57:10,416 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:10,417 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:10,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:10,631 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1378379289, now seen corresponding path program 8 times [2021-01-06 09:57:10,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:10,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565960523] [2021-01-06 09:57:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 09:57:10,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565960523] [2021-01-06 09:57:10,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020307714] [2021-01-06 09:57:10,830 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:10,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:10,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:10,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:57:10,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 09:57:10,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:10,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:57:10,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841107677] [2021-01-06 09:57:10,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:57:10,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:10,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:57:10,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:57:10,969 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 14 states. [2021-01-06 09:57:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:11,074 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-01-06 09:57:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:57:11,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2021-01-06 09:57:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:11,076 INFO L225 Difference]: With dead ends: 99 [2021-01-06 09:57:11,076 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:57:11,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:57:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:57:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-01-06 09:57:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 09:57:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-01-06 09:57:11,084 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2021-01-06 09:57:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:11,085 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-01-06 09:57:11,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:57:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-01-06 09:57:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:57:11,086 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:11,086 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:11,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:57:11,300 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1508450091, now seen corresponding path program 9 times [2021-01-06 09:57:11,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:11,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248811619] [2021-01-06 09:57:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-01-06 09:57:11,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248811619] [2021-01-06 09:57:11,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447657815] [2021-01-06 09:57:11,493 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:11,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 09:57:11,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 09:57:11,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:11,628 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 09:57:11,629 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,633 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:11,634 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,634 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2021-01-06 09:57:11,716 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-01-06 09:57:11,717 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,722 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:11,723 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2021-01-06 09:57:11,792 INFO L348 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2021-01-06 09:57:11,793 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 51 [2021-01-06 09:57:11,796 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,803 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:11,804 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,804 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-01-06 09:57:11,912 INFO L348 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2021-01-06 09:57:11,913 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 78 [2021-01-06 09:57:11,915 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,925 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:11,926 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,927 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:70 [2021-01-06 09:57:12,415 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 09:57:12,422 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 09:57:12,427 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 09:57:12,436 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 09:57:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 55 proven. 50 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 09:57:12,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:12,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-01-06 09:57:12,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430452765] [2021-01-06 09:57:12,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:57:12,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:12,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:57:12,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:57:12,502 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 29 states. [2021-01-06 09:57:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:14,897 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-01-06 09:57:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 09:57:14,898 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2021-01-06 09:57:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:14,899 INFO L225 Difference]: With dead ends: 112 [2021-01-06 09:57:14,899 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 09:57:14,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=999, Invalid=3693, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 09:57:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 09:57:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-01-06 09:57:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 09:57:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-01-06 09:57:14,911 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2021-01-06 09:57:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:14,912 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-01-06 09:57:14,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:57:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-01-06 09:57:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 09:57:14,912 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:14,913 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:15,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:57:15,127 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:15,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:15,128 INFO L82 PathProgramCache]: Analyzing trace with hash 690052103, now seen corresponding path program 10 times [2021-01-06 09:57:15,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:15,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584283783] [2021-01-06 09:57:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 09:57:15,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584283783] [2021-01-06 09:57:15,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634622164] [2021-01-06 09:57:15,341 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:15,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:57:15,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:15,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:57:15,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 09:57:15,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:15,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:57:15,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894125724] [2021-01-06 09:57:15,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:57:15,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:15,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:57:15,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:57:15,533 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 16 states. [2021-01-06 09:57:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:15,653 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-01-06 09:57:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:57:15,653 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2021-01-06 09:57:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:15,654 INFO L225 Difference]: With dead ends: 119 [2021-01-06 09:57:15,654 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 09:57:15,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:57:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 09:57:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-01-06 09:57:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 09:57:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-01-06 09:57:15,665 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 69 [2021-01-06 09:57:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:15,665 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-01-06 09:57:15,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:57:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-01-06 09:57:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 09:57:15,666 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:15,666 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:15,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:57:15,881 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:15,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:15,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1753776957, now seen corresponding path program 11 times [2021-01-06 09:57:15,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:15,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753193542] [2021-01-06 09:57:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:16,064 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 09:57:16,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753193542] [2021-01-06 09:57:16,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073494906] [2021-01-06 09:57:16,064 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:23,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-01-06 09:57:23,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:23,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:57:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:23,159 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 09:57:23,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:23,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:57:23,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542822991] [2021-01-06 09:57:23,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:57:23,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:57:23,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:57:23,161 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 17 states. [2021-01-06 09:57:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:23,298 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2021-01-06 09:57:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:57:23,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2021-01-06 09:57:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:23,300 INFO L225 Difference]: With dead ends: 125 [2021-01-06 09:57:23,300 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 09:57:23,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:57:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 09:57:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-01-06 09:57:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 09:57:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-01-06 09:57:23,310 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2021-01-06 09:57:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:23,311 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-01-06 09:57:23,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:57:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-01-06 09:57:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 09:57:23,311 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:23,312 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:23,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:23,525 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:23,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2078527359, now seen corresponding path program 12 times [2021-01-06 09:57:23,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:23,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950957631] [2021-01-06 09:57:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-01-06 09:57:23,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950957631] [2021-01-06 09:57:23,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51072606] [2021-01-06 09:57:23,750 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:26,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 09:57:26,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:26,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:57:26,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-01-06 09:57:26,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:26,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:57:26,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229561962] [2021-01-06 09:57:26,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:57:26,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:26,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:57:26,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:57:26,091 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 18 states. [2021-01-06 09:57:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:26,236 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2021-01-06 09:57:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:57:26,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2021-01-06 09:57:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:26,237 INFO L225 Difference]: With dead ends: 131 [2021-01-06 09:57:26,238 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 09:57:26,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:57:26,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 09:57:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2021-01-06 09:57:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 09:57:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-01-06 09:57:26,253 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2021-01-06 09:57:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:26,254 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-01-06 09:57:26,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:57:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-01-06 09:57:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 09:57:26,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:26,256 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:26,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:57:26,469 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:26,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:26,470 INFO L82 PathProgramCache]: Analyzing trace with hash -595504069, now seen corresponding path program 13 times [2021-01-06 09:57:26,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:26,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355831233] [2021-01-06 09:57:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-01-06 09:57:26,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355831233] [2021-01-06 09:57:26,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958687643] [2021-01-06 09:57:26,681 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:26,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:57:26,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-01-06 09:57:26,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:26,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:57:26,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098474592] [2021-01-06 09:57:26,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:57:26,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:26,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:57:26,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:57:26,850 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 19 states. [2021-01-06 09:57:27,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:27,001 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-01-06 09:57:27,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:57:27,001 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2021-01-06 09:57:27,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:27,002 INFO L225 Difference]: With dead ends: 137 [2021-01-06 09:57:27,002 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 09:57:27,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 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 09:57:27,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 09:57:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2021-01-06 09:57:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 09:57:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-01-06 09:57:27,014 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 81 [2021-01-06 09:57:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:27,014 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-01-06 09:57:27,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:57:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-01-06 09:57:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 09:57:27,015 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:27,015 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:27,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:57:27,229 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash 686492407, now seen corresponding path program 14 times [2021-01-06 09:57:27,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:27,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186055082] [2021-01-06 09:57:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-01-06 09:57:27,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186055082] [2021-01-06 09:57:27,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941511499] [2021-01-06 09:57:27,476 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:27,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:27,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:27,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:57:27,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-01-06 09:57:27,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:27,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:57:27,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020146921] [2021-01-06 09:57:27,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:57:27,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:27,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:57:27,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:57:27,646 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 20 states. [2021-01-06 09:57:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:27,800 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2021-01-06 09:57:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:57:27,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2021-01-06 09:57:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:27,801 INFO L225 Difference]: With dead ends: 143 [2021-01-06 09:57:27,801 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 09:57:27,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:57:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 09:57:27,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2021-01-06 09:57:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 09:57:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-01-06 09:57:27,812 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2021-01-06 09:57:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:27,812 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-01-06 09:57:27,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:57:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-01-06 09:57:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 09:57:27,813 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:27,813 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:28,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:57:28,028 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:28,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1170476109, now seen corresponding path program 15 times [2021-01-06 09:57:28,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:28,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948878757] [2021-01-06 09:57:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-01-06 09:57:28,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948878757] [2021-01-06 09:57:28,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223138543] [2021-01-06 09:57:28,333 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:28,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:57:28,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:28,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 09:57:28,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:28,775 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 09:57:28,776 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:28,783 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:28,784 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:28,784 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 09:57:28,993 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-01-06 09:57:28,994 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:29,002 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:29,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:29,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-01-06 09:57:29,089 INFO L348 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2021-01-06 09:57:29,089 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 51 [2021-01-06 09:57:29,091 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:29,103 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:29,106 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:29,107 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2021-01-06 09:57:29,225 INFO L348 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2021-01-06 09:57:29,225 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 78 [2021-01-06 09:57:29,227 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:29,240 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:29,241 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:29,241 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:73 [2021-01-06 09:57:29,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:29,374 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 105 [2021-01-06 09:57:29,376 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:29,395 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:29,395 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:29,396 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:97 [2021-01-06 09:57:30,167 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 09:57:30,171 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 09:57:30,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 09:57:30,175 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 09:57:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 144 proven. 114 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 09:57:30,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:30,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-01-06 09:57:30,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987843189] [2021-01-06 09:57:30,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 09:57:30,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:30,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 09:57:30,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 09:57:30,284 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 41 states. [2021-01-06 09:57:34,983 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-01-06 09:57:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:35,799 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2021-01-06 09:57:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 09:57:35,800 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2021-01-06 09:57:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:35,801 INFO L225 Difference]: With dead ends: 158 [2021-01-06 09:57:35,801 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 09:57:35,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2870 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2177, Invalid=7723, Unknown=0, NotChecked=0, Total=9900 [2021-01-06 09:57:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 09:57:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2021-01-06 09:57:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 09:57:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2021-01-06 09:57:35,821 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 89 [2021-01-06 09:57:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:35,821 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2021-01-06 09:57:35,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 09:57:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2021-01-06 09:57:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 09:57:35,822 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:35,822 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:36,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:36,037 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash -711078751, now seen corresponding path program 16 times [2021-01-06 09:57:36,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:36,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332290462] [2021-01-06 09:57:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2021-01-06 09:57:36,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332290462] [2021-01-06 09:57:36,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836106870] [2021-01-06 09:57:36,337 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:36,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:57:36,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:36,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:57:36,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2021-01-06 09:57:36,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:36,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:57:36,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236853376] [2021-01-06 09:57:36,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:57:36,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:36,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:57:36,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:57:36,541 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 23 states. [2021-01-06 09:57:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:36,716 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2021-01-06 09:57:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:57:36,717 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2021-01-06 09:57:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:36,717 INFO L225 Difference]: With dead ends: 169 [2021-01-06 09:57:36,717 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 09:57:36,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:57:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 09:57:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-01-06 09:57:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 09:57:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-01-06 09:57:36,737 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2021-01-06 09:57:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:36,738 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-01-06 09:57:36,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:57:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-01-06 09:57:36,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 09:57:36,739 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:36,739 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:36,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:36,947 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:36,948 INFO L82 PathProgramCache]: Analyzing trace with hash -785347235, now seen corresponding path program 17 times [2021-01-06 09:57:36,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:36,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126147566] [2021-01-06 09:57:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-01-06 09:57:37,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126147566] [2021-01-06 09:57:37,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053476560] [2021-01-06 09:57:37,283 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:59:53,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 09:59:53,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:59:53,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:59:53,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:59:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-01-06 09:59:53,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:59:53,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 09:59:53,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918692753] [2021-01-06 09:59:53,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:59:53,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:59:53,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:59:53,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:59:53,640 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 24 states. [2021-01-06 09:59:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:59:53,803 INFO L93 Difference]: Finished difference Result 175 states and 180 transitions. [2021-01-06 09:59:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:59:53,804 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2021-01-06 09:59:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:59:53,805 INFO L225 Difference]: With dead ends: 175 [2021-01-06 09:59:53,805 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 09:59:53,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:59:53,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 09:59:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2021-01-06 09:59:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 09:59:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-01-06 09:59:53,821 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 105 [2021-01-06 09:59:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:59:53,821 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-01-06 09:59:53,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:59:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-01-06 09:59:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-06 09:59:53,822 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:59:53,823 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:59:54,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 09:59:54,036 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:59:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:59:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash -198344679, now seen corresponding path program 18 times [2021-01-06 09:59:54,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:59:54,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909982112] [2021-01-06 09:59:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:59:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:59:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-01-06 09:59:54,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909982112] [2021-01-06 09:59:54,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100688767] [2021-01-06 09:59:54,437 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:00:03,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-01-06 10:00:03,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:00:03,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 10:00:03,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:00:03,984 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 10:00:03,985 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:03,990 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:03,991 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:03,991 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2021-01-06 10:00:04,168 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-01-06 10:00:04,170 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:04,180 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:04,181 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:04,181 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-01-06 10:00:04,267 INFO L348 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2021-01-06 10:00:04,267 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 51 [2021-01-06 10:00:04,268 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:04,279 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:04,280 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:04,280 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2021-01-06 10:00:04,422 INFO L348 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2021-01-06 10:00:04,423 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 78 [2021-01-06 10:00:04,425 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:04,440 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:04,441 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:04,441 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:73 [2021-01-06 10:00:04,629 INFO L348 Elim1Store]: treesize reduction 279, result has 11.7 percent of original size [2021-01-06 10:00:04,630 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 88 treesize of output 105 [2021-01-06 10:00:04,632 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:04,649 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:04,650 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:04,650 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:98, output treesize:94 [2021-01-06 10:00:04,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:00:04,844 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 132 [2021-01-06 10:00:04,846 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:04,869 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:04,870 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:04,870 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:122, output treesize:118 [2021-01-06 10:00:05,937 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:00:05,940 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:00:05,942 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:00:05,953 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 10:00:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 141 proven. 188 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2021-01-06 10:00:06,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:00:06,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-01-06 10:00:06,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033459645] [2021-01-06 10:00:06,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:00:06,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:00:06,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:00:06,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:00:06,120 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 47 states. [2021-01-06 10:00:11,831 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2021-01-06 10:00:13,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:00:13,019 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2021-01-06 10:00:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 10:00:13,020 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 109 [2021-01-06 10:00:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:00:13,021 INFO L225 Difference]: With dead ends: 188 [2021-01-06 10:00:13,021 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 10:00:13,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4007 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2901, Invalid=10671, Unknown=0, NotChecked=0, Total=13572 [2021-01-06 10:00:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 10:00:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2021-01-06 10:00:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 10:00:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2021-01-06 10:00:13,042 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 109 [2021-01-06 10:00:13,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:00:13,042 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2021-01-06 10:00:13,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:00:13,042 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2021-01-06 10:00:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 10:00:13,043 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:00:13,043 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:00:13,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:00:13,245 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:00:13,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:00:13,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1914883765, now seen corresponding path program 19 times [2021-01-06 10:00:13,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:00:13,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091794545] [2021-01-06 10:00:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:00:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:00:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-01-06 10:00:13,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091794545] [2021-01-06 10:00:13,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312877798] [2021-01-06 10:00:13,683 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:00:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:00:13,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:00:13,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:00:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-01-06 10:00:13,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:00:13,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 10:00:13,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858426535] [2021-01-06 10:00:13,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:00:13,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:00:13,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:00:13,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:00:13,908 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 26 states. [2021-01-06 10:00:14,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:00:14,124 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2021-01-06 10:00:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:00:14,125 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 117 [2021-01-06 10:00:14,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:00:14,126 INFO L225 Difference]: With dead ends: 195 [2021-01-06 10:00:14,126 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 10:00:14,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:00:14,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 10:00:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-01-06 10:00:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 10:00:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2021-01-06 10:00:14,146 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 117 [2021-01-06 10:00:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:00:14,146 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2021-01-06 10:00:14,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:00:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2021-01-06 10:00:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 10:00:14,148 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:00:14,148 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:00:14,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:00:14,363 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:00:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:00:14,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1212298745, now seen corresponding path program 20 times [2021-01-06 10:00:14,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:00:14,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928932166] [2021-01-06 10:00:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:00:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:00:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2021-01-06 10:00:14,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928932166] [2021-01-06 10:00:14,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496248401] [2021-01-06 10:00:14,805 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:00:14,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:00:14,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:00:14,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:00:14,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:00:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2021-01-06 10:00:15,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:00:15,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 10:00:15,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740005530] [2021-01-06 10:00:15,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:00:15,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:00:15,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:00:15,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:00:15,037 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 27 states. [2021-01-06 10:00:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:00:15,284 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2021-01-06 10:00:15,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:00:15,288 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2021-01-06 10:00:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:00:15,289 INFO L225 Difference]: With dead ends: 201 [2021-01-06 10:00:15,289 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 10:00:15,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:00:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 10:00:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-01-06 10:00:15,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 10:00:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2021-01-06 10:00:15,308 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 121 [2021-01-06 10:00:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:00:15,308 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2021-01-06 10:00:15,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:00:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2021-01-06 10:00:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-01-06 10:00:15,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:00:15,310 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:00:15,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:00:15,519 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:00:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:00:15,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1712286525, now seen corresponding path program 21 times [2021-01-06 10:00:15,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:00:15,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776373271] [2021-01-06 10:00:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:00:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:00:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2021-01-06 10:00:16,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776373271] [2021-01-06 10:00:16,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8552446] [2021-01-06 10:00:16,020 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:00:16,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-01-06 10:00:16,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:00:16,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 10:00:16,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:00:16,634 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 10:00:16,636 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:16,638 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:16,638 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:16,638 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2021-01-06 10:00:16,756 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-01-06 10:00:16,757 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:16,763 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:16,763 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:16,764 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2021-01-06 10:00:16,839 INFO L348 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2021-01-06 10:00:16,840 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 51 [2021-01-06 10:00:16,841 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:16,850 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:16,850 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:16,851 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-01-06 10:00:16,963 INFO L348 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2021-01-06 10:00:16,964 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 78 [2021-01-06 10:00:16,965 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:16,975 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:16,975 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:16,976 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:67 [2021-01-06 10:00:17,152 INFO L348 Elim1Store]: treesize reduction 279, result has 11.7 percent of original size [2021-01-06 10:00:17,153 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 88 treesize of output 105 [2021-01-06 10:00:17,160 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:17,172 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:17,173 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:17,173 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:88 [2021-01-06 10:00:17,410 INFO L348 Elim1Store]: treesize reduction 444, result has 9.9 percent of original size [2021-01-06 10:00:17,410 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 109 treesize of output 132 [2021-01-06 10:00:17,413 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:17,431 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:17,434 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:17,435 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:113, output treesize:109 [2021-01-06 10:00:17,747 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 33 [2021-01-06 10:00:17,748 INFO L348 Elim1Store]: treesize reduction 645, result has 8.6 percent of original size [2021-01-06 10:00:17,748 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 30 case distinctions, treesize of input 130 treesize of output 159 [2021-01-06 10:00:17,751 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:00:17,774 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:00:17,775 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:00:17,776 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:137, output treesize:133 [2021-01-06 10:00:19,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:00:19,081 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:00:19,084 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 10:00:19,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 10:00:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 247 proven. 55 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-01-06 10:00:19,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:00:19,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 49 [2021-01-06 10:00:19,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945731062] [2021-01-06 10:00:19,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 10:00:19,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:00:19,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 10:00:19,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=1888, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:00:19,235 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 49 states. [2021-01-06 10:00:26,401 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 100 [2021-01-06 10:00:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:00:27,724 INFO L93 Difference]: Finished difference Result 214 states and 220 transitions. [2021-01-06 10:00:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-01-06 10:00:27,724 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 125 [2021-01-06 10:00:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:00:27,726 INFO L225 Difference]: With dead ends: 214 [2021-01-06 10:00:27,726 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 10:00:27,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5197 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3708, Invalid=13848, Unknown=0, NotChecked=0, Total=17556 [2021-01-06 10:00:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 10:00:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2021-01-06 10:00:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 10:00:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2021-01-06 10:00:27,749 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 125 [2021-01-06 10:00:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:00:27,750 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2021-01-06 10:00:27,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 10:00:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2021-01-06 10:00:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-01-06 10:00:27,751 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:00:27,751 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:00:27,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:00:27,966 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:00:27,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:00:27,967 INFO L82 PathProgramCache]: Analyzing trace with hash -775702283, now seen corresponding path program 22 times [2021-01-06 10:00:27,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:00:27,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749737513] [2021-01-06 10:00:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:00:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:00:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1322 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2021-01-06 10:00:28,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749737513] [2021-01-06 10:00:28,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181604676] [2021-01-06 10:00:28,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:00:28,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:00:28,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:00:28,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:00:28,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:00:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1322 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2021-01-06 10:00:28,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:00:28,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:00:28,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087031826] [2021-01-06 10:00:28,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:00:28,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:00:28,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:00:28,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:00:28,800 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 29 states. [2021-01-06 10:00:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:00:29,089 INFO L93 Difference]: Finished difference Result 221 states and 226 transitions. [2021-01-06 10:00:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:00:29,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 133 [2021-01-06 10:00:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:00:29,091 INFO L225 Difference]: With dead ends: 221 [2021-01-06 10:00:29,091 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 10:00:29,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:00:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 10:00:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2021-01-06 10:00:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 10:00:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2021-01-06 10:00:29,116 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 133 [2021-01-06 10:00:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:00:29,116 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2021-01-06 10:00:29,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:00:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2021-01-06 10:00:29,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-01-06 10:00:29,118 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:00:29,118 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:00:29,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:00:29,332 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:00:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:00:29,332 INFO L82 PathProgramCache]: Analyzing trace with hash 452864433, now seen corresponding path program 23 times [2021-01-06 10:00:29,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:00:29,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232495980] [2021-01-06 10:00:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:00:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:00:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-01-06 10:00:29,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232495980] [2021-01-06 10:00:29,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696110042] [2021-01-06 10:00:29,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true