/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_init4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:51:47,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:51:47,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:51:47,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:51:47,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:51:47,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:51:47,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:51:47,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:51:47,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:51:47,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:51:47,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:51:47,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:51:47,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:51:47,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:51:47,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:51:47,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:51:47,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:51:47,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:51:47,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:51:47,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:51:47,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:51:47,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:51:47,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:51:47,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:51:47,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:51:47,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:51:48,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:51:48,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:51:48,007 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 09:51:48,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:51:48,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:51:48,070 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:51:48,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:51:48,071 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:51:48,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:51:48,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:51:48,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:51:48,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:51:48,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:51:48,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:51:48,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:51:48,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:51:48,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:51:48,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:51:48,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:51:48,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:51:48,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:51:48,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:51:48,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:51:48,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:51:48,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:51:48,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:51:48,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:51:48,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:51:48,077 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:51:48,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:51:48,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:51:48,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:51:48,572 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:51:48,572 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:51:48,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init4_ground-1.i [2021-01-06 09:51:48,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/915867eff/fbda11e1701c4256942f2f4cb43c56ca/FLAGdd32d1dc2 [2021-01-06 09:51:49,403 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:51:49,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init4_ground-1.i [2021-01-06 09:51:49,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/915867eff/fbda11e1701c4256942f2f4cb43c56ca/FLAGdd32d1dc2 [2021-01-06 09:51:49,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/915867eff/fbda11e1701c4256942f2f4cb43c56ca [2021-01-06 09:51:49,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:51:49,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:51:49,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:51:49,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:51:49,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:51:49,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:51:49" (1/1) ... [2021-01-06 09:51:49,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6eafab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:49, skipping insertion in model container [2021-01-06 09:51:49,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:51:49" (1/1) ... [2021-01-06 09:51:49,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:51:49,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:51:49,985 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_init4_ground-1.i[816,829] 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: 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: 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: 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: VariableLHS[~x~0,] [2021-01-06 09:51:50,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:51:50,018 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:51:50,034 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_init4_ground-1.i[816,829] 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: 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: 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: 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: lhs: VariableLHS[~x~0,] [2021-01-06 09:51:50,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:51:50,062 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:51:50,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50 WrapperNode [2021-01-06 09:51:50,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:51:50,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:51:50,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:51:50,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:51:50,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50" (1/1) ... [2021-01-06 09:51:50,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50" (1/1) ... [2021-01-06 09:51:50,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:51:50,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:51:50,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:51:50,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:51:50,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50" (1/1) ... [2021-01-06 09:51:50,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50" (1/1) ... [2021-01-06 09:51:50,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50" (1/1) ... [2021-01-06 09:51:50,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50" (1/1) ... [2021-01-06 09:51:50,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50" (1/1) ... [2021-01-06 09:51:50,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50" (1/1) ... [2021-01-06 09:51:50,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50" (1/1) ... [2021-01-06 09:51:50,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:51:50,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:51:50,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:51:50,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:51:50,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50" (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 09:51:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:51:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:51:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:51:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:51:50,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:51:50,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:51:50,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:51:50,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:51:50,693 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 09:51:50,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:51:50 BoogieIcfgContainer [2021-01-06 09:51:50,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:51:50,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:51:50,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:51:50,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:51:50,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:51:49" (1/3) ... [2021-01-06 09:51:50,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3f0a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:51:50, skipping insertion in model container [2021-01-06 09:51:50,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:50" (2/3) ... [2021-01-06 09:51:50,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3f0a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:51:50, skipping insertion in model container [2021-01-06 09:51:50,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:51:50" (3/3) ... [2021-01-06 09:51:50,706 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2021-01-06 09:51:50,714 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:51:50,719 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:51:50,742 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:51:50,785 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:51:50,785 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:51:50,785 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:51:50,786 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:51:50,786 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:51:50,786 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:51:50,786 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:51:50,786 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:51:50,808 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 09:51:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 09:51:50,816 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:50,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:50,817 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash 474620133, now seen corresponding path program 1 times [2021-01-06 09:51:50,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:50,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444042879] [2021-01-06 09:51:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:51,133 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 09:51:51,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444042879] [2021-01-06 09:51:51,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:51:51,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:51:51,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880509121] [2021-01-06 09:51:51,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:51:51,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:51,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:51:51,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:51:51,174 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2021-01-06 09:51:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:51,297 INFO L93 Difference]: Finished difference Result 41 states and 67 transitions. [2021-01-06 09:51:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:51:51,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2021-01-06 09:51:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:51,310 INFO L225 Difference]: With dead ends: 41 [2021-01-06 09:51:51,311 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 09:51:51,314 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 09:51:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 09:51:51,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 09:51:51,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 09:51:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-01-06 09:51:51,354 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-01-06 09:51:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:51,355 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-01-06 09:51:51,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:51:51,355 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-01-06 09:51:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 09:51:51,356 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:51,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:51,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:51:51,357 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:51,358 INFO L82 PathProgramCache]: Analyzing trace with hash -40844573, now seen corresponding path program 1 times [2021-01-06 09:51:51,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:51,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958894764] [2021-01-06 09:51:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 09:51:51,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958894764] [2021-01-06 09:51:51,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218629508] [2021-01-06 09:51:51,425 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 09:51:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:51,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:51:51,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 09:51:51,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:51,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:51:51,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762818558] [2021-01-06 09:51:51,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:51:51,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:51,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:51:51,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:51:51,586 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2021-01-06 09:51:51,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:51,639 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-01-06 09:51:51,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:51:51,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-01-06 09:51:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:51,641 INFO L225 Difference]: With dead ends: 40 [2021-01-06 09:51:51,641 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 09:51:51,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:51:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 09:51:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 09:51:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:51:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 09:51:51,649 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-01-06 09:51:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:51,650 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 09:51:51,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:51:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 09:51:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:51:51,651 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:51,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:51,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:51:51,866 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:51,868 INFO L82 PathProgramCache]: Analyzing trace with hash 84997541, now seen corresponding path program 2 times [2021-01-06 09:51:51,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:51,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898432831] [2021-01-06 09:51:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:51:51,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898432831] [2021-01-06 09:51:51,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362384788] [2021-01-06 09:51:51,981 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 09:51:52,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:51:52,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:52,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:51:52,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:51:52,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:52,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:51:52,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308548121] [2021-01-06 09:51:52,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:51:52,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:51:52,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:51:52,112 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2021-01-06 09:51:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:52,173 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-01-06 09:51:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:51:52,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 09:51:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:52,177 INFO L225 Difference]: With dead ends: 47 [2021-01-06 09:51:52,177 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 09:51:52,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 09:51:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 09:51:52,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 09:51:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 09:51:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-06 09:51:52,194 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2021-01-06 09:51:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:52,195 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-06 09:51:52,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:51:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-06 09:51:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 09:51:52,196 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:52,199 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:52,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:52,401 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:52,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1963806883, now seen corresponding path program 3 times [2021-01-06 09:51:52,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:52,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042297019] [2021-01-06 09:51:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:51:52,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042297019] [2021-01-06 09:51:52,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134753235] [2021-01-06 09:51:52,487 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 09:51:52,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:51:52,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:52,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:51:52,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:51:52,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:52,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:51:52,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057600049] [2021-01-06 09:51:52,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:51:52,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:51:52,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:51:52,660 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2021-01-06 09:51:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:52,720 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-01-06 09:51:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:51:52,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2021-01-06 09:51:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:52,722 INFO L225 Difference]: With dead ends: 54 [2021-01-06 09:51:52,722 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:51:52,723 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 09:51:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:51:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 09:51:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 09:51:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-01-06 09:51:52,730 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2021-01-06 09:51:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:52,730 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-01-06 09:51:52,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:51:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-01-06 09:51:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:51:52,731 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:52,732 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:52,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:52,947 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:52,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1096399461, now seen corresponding path program 4 times [2021-01-06 09:51:52,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:52,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831886781] [2021-01-06 09:51:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 09:51:53,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831886781] [2021-01-06 09:51:53,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278119321] [2021-01-06 09:51:53,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:53,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:51:53,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:51:53,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 09:51:53,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:53,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:51:53,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885683606] [2021-01-06 09:51:53,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:51:53,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:53,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:51:53,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:51:53,260 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2021-01-06 09:51:53,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:53,345 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-01-06 09:51:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:51:53,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2021-01-06 09:51:53,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:53,350 INFO L225 Difference]: With dead ends: 61 [2021-01-06 09:51:53,350 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 09:51:53,352 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 09:51:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 09:51:53,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 09:51:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 09:51:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-01-06 09:51:53,372 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2021-01-06 09:51:53,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:53,372 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-01-06 09:51:53,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:51:53,373 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-01-06 09:51:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:51:53,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:53,374 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:53,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:53,578 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash -910872989, now seen corresponding path program 5 times [2021-01-06 09:51:53,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:53,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952283176] [2021-01-06 09:51:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 09:51:53,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952283176] [2021-01-06 09:51:53,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689672862] [2021-01-06 09:51:53,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:54,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 09:51:54,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:54,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:51:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 09:51:54,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:54,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:51:54,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860748453] [2021-01-06 09:51:54,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:51:54,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:54,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:51:54,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:51:54,056 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2021-01-06 09:51:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:54,115 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-01-06 09:51:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:51:54,115 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2021-01-06 09:51:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:54,116 INFO L225 Difference]: With dead ends: 68 [2021-01-06 09:51:54,116 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 09:51:54,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:51:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 09:51:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 09:51:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 09:51:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-01-06 09:51:54,123 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 33 [2021-01-06 09:51:54,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:54,123 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-01-06 09:51:54,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:51:54,124 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-01-06 09:51:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 09:51:54,125 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:54,125 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:54,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:51:54,341 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:54,342 INFO L82 PathProgramCache]: Analyzing trace with hash 937193253, now seen corresponding path program 6 times [2021-01-06 09:51:54,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:54,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251758551] [2021-01-06 09:51:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-01-06 09:51:54,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251758551] [2021-01-06 09:51:54,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072367282] [2021-01-06 09:51:54,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:54,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 09:51:54,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:51:54,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-01-06 09:51:54,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:54,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:51:54,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702490001] [2021-01-06 09:51:54,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:51:54,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:54,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:51:54,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:51:54,867 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 10 states. [2021-01-06 09:51:54,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:54,964 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2021-01-06 09:51:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:51:54,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2021-01-06 09:51:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:54,966 INFO L225 Difference]: With dead ends: 75 [2021-01-06 09:51:54,966 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:51:54,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 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 09:51:54,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:51:54,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 09:51:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:51:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-01-06 09:51:54,973 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2021-01-06 09:51:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:54,973 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-01-06 09:51:54,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:51:54,973 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-01-06 09:51:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:51:54,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:54,974 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:55,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:55,189 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:55,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:55,190 INFO L82 PathProgramCache]: Analyzing trace with hash -80716765, now seen corresponding path program 7 times [2021-01-06 09:51:55,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:55,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822262900] [2021-01-06 09:51:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 09:51:55,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822262900] [2021-01-06 09:51:55,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833103255] [2021-01-06 09:51:55,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:55,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:51:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 09:51:55,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:55,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:51:55,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234547822] [2021-01-06 09:51:55,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:51:55,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:55,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:51:55,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:51:55,558 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 11 states. [2021-01-06 09:51:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:55,651 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2021-01-06 09:51:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:51:55,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2021-01-06 09:51:55,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:55,653 INFO L225 Difference]: With dead ends: 82 [2021-01-06 09:51:55,653 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 09:51:55,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:51:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 09:51:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 09:51:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 09:51:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-01-06 09:51:55,660 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 41 [2021-01-06 09:51:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:55,660 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-01-06 09:51:55,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:51:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-01-06 09:51:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 09:51:55,661 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:55,662 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:55,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:55,875 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1336863771, now seen corresponding path program 8 times [2021-01-06 09:51:55,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:55,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826636762] [2021-01-06 09:51:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 09:51:56,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826636762] [2021-01-06 09:51:56,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271398040] [2021-01-06 09:51:56,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:56,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:51:56,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:56,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:51:56,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 09:51:56,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:56,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:51:56,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703464031] [2021-01-06 09:51:56,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:51:56,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:56,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:51:56,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:51:56,179 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 12 states. [2021-01-06 09:51:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:56,277 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2021-01-06 09:51:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:51:56,277 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2021-01-06 09:51:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:56,278 INFO L225 Difference]: With dead ends: 89 [2021-01-06 09:51:56,278 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 09:51:56,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 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 09:51:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 09:51:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-06 09:51:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 09:51:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-01-06 09:51:56,286 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 45 [2021-01-06 09:51:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:56,286 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-01-06 09:51:56,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:51:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-01-06 09:51:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 09:51:56,287 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:56,287 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:56,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:51:56,499 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:56,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:56,500 INFO L82 PathProgramCache]: Analyzing trace with hash -131671581, now seen corresponding path program 9 times [2021-01-06 09:51:56,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:56,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87063802] [2021-01-06 09:51:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-01-06 09:51:56,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87063802] [2021-01-06 09:51:56,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903591391] [2021-01-06 09:51:56,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:58,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:51:58,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:51:58,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-01-06 09:51:58,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:58,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:51:58,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050299407] [2021-01-06 09:51:58,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:51:58,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:58,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:51:58,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:51:58,322 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 13 states. [2021-01-06 09:51:58,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:58,427 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2021-01-06 09:51:58,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:51:58,428 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2021-01-06 09:51:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:58,429 INFO L225 Difference]: With dead ends: 96 [2021-01-06 09:51:58,429 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:51:58,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 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 09:51:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:51:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-06 09:51:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 09:51:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-01-06 09:51:58,438 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2021-01-06 09:51:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:58,438 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-01-06 09:51:58,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:51:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-01-06 09:51:58,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:51:58,440 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:58,440 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:58,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:58,656 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1399826597, now seen corresponding path program 10 times [2021-01-06 09:51:58,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:58,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921510090] [2021-01-06 09:51:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-01-06 09:51:58,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921510090] [2021-01-06 09:51:58,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125457909] [2021-01-06 09:51:58,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:58,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:51:58,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:58,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:51:58,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-01-06 09:51:59,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:59,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:51:59,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511875603] [2021-01-06 09:51:59,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:51:59,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:59,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:51:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:51:59,033 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 14 states. [2021-01-06 09:51:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:59,149 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-01-06 09:51:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:51:59,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2021-01-06 09:51:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:59,151 INFO L225 Difference]: With dead ends: 103 [2021-01-06 09:51:59,151 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 09:51:59,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 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 09:51:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 09:51:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 09:51:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 09:51:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-01-06 09:51:59,178 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 53 [2021-01-06 09:51:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:59,178 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-01-06 09:51:59,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:51:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-01-06 09:51:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 09:51:59,183 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:59,183 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:59,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:59,385 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:59,386 INFO L82 PathProgramCache]: Analyzing trace with hash 507553699, now seen corresponding path program 11 times [2021-01-06 09:51:59,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:59,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403321673] [2021-01-06 09:51:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-01-06 09:51:59,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403321673] [2021-01-06 09:51:59,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307029052] [2021-01-06 09:51:59,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:40,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 09:52:40,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:41,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:52:41,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-01-06 09:52:41,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:41,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:52:41,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366103803] [2021-01-06 09:52:41,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:52:41,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:41,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:52:41,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:52:41,129 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 15 states. [2021-01-06 09:52:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:41,233 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-01-06 09:52:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:52:41,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2021-01-06 09:52:41,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:41,234 INFO L225 Difference]: With dead ends: 110 [2021-01-06 09:52:41,234 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:52:41,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:52:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:52:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-01-06 09:52:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:52:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-01-06 09:52:41,240 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 57 [2021-01-06 09:52:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:41,241 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-01-06 09:52:41,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:52:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-01-06 09:52:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:52:41,242 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:41,242 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:41,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:52:41,456 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:41,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:41,457 INFO L82 PathProgramCache]: Analyzing trace with hash 720383333, now seen corresponding path program 12 times [2021-01-06 09:52:41,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:41,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757649720] [2021-01-06 09:52:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-01-06 09:52:41,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757649720] [2021-01-06 09:52:41,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34393197] [2021-01-06 09:52:41,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:49,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:52:49,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:49,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:52:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-01-06 09:52:49,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:49,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:52:49,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128533058] [2021-01-06 09:52:49,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:52:49,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:52:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:52:49,851 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 16 states. [2021-01-06 09:52:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:49,967 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2021-01-06 09:52:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:52:49,967 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2021-01-06 09:52:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:49,968 INFO L225 Difference]: With dead ends: 117 [2021-01-06 09:52:49,968 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 09:52:49,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 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 09:52:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 09:52:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-01-06 09:52:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 09:52:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-01-06 09:52:49,978 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 61 [2021-01-06 09:52:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:49,978 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-01-06 09:52:49,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:52:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-01-06 09:52:49,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 09:52:49,979 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:49,979 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:50,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:52:50,180 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1171929757, now seen corresponding path program 13 times [2021-01-06 09:52:50,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:50,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013557451] [2021-01-06 09:52:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-01-06 09:52:50,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013557451] [2021-01-06 09:52:50,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919402504] [2021-01-06 09:52:50,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:52:50,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-01-06 09:52:50,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:50,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:52:50,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933357571] [2021-01-06 09:52:50,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:52:50,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:50,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:52:50,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:52:50,599 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 17 states. [2021-01-06 09:52:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:50,729 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2021-01-06 09:52:50,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:52:50,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2021-01-06 09:52:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:50,730 INFO L225 Difference]: With dead ends: 124 [2021-01-06 09:52:50,730 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 09:52:50,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 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 09:52:50,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 09:52:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 09:52:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 09:52:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-01-06 09:52:50,737 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 65 [2021-01-06 09:52:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:50,737 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-01-06 09:52:50,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:52:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-01-06 09:52:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 09:52:50,738 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:50,738 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:50,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:52:50,954 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:50,955 INFO L82 PathProgramCache]: Analyzing trace with hash 562733605, now seen corresponding path program 14 times [2021-01-06 09:52:50,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:50,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070909681] [2021-01-06 09:52:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-01-06 09:52:51,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070909681] [2021-01-06 09:52:51,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980817691] [2021-01-06 09:52:51,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:51,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:51,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:51,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:52:51,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-01-06 09:52:51,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:51,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:52:51,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553642609] [2021-01-06 09:52:51,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:52:51,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:51,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:52:51,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:52:51,412 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 18 states. [2021-01-06 09:52:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:51,550 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2021-01-06 09:52:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:52:51,550 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2021-01-06 09:52:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:51,551 INFO L225 Difference]: With dead ends: 131 [2021-01-06 09:52:51,551 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 09:52:51,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 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 09:52:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 09:52:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-01-06 09:52:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 09:52:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-01-06 09:52:51,557 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2021-01-06 09:52:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:51,557 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-01-06 09:52:51,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:52:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-01-06 09:52:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 09:52:51,558 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:51,558 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:51,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:51,772 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:51,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2021772509, now seen corresponding path program 15 times [2021-01-06 09:52:51,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:51,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661730628] [2021-01-06 09:52:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-01-06 09:52:52,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661730628] [2021-01-06 09:52:52,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732587777] [2021-01-06 09:52:52,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:53:14,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:53:14,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:53:14,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:53:14,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:53:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-01-06 09:53:14,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:53:14,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:53:14,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310254089] [2021-01-06 09:53:14,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:53:14,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:53:14,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:53:14,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:53:14,549 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 19 states. [2021-01-06 09:53:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:53:14,683 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2021-01-06 09:53:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:53:14,684 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2021-01-06 09:53:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:53:14,685 INFO L225 Difference]: With dead ends: 138 [2021-01-06 09:53:14,685 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 09:53:14,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 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 09:53:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 09:53:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-01-06 09:53:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 09:53:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-01-06 09:53:14,690 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 73 [2021-01-06 09:53:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:53:14,690 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-01-06 09:53:14,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:53:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-01-06 09:53:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 09:53:14,691 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:53:14,691 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:53:14,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:53:14,907 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:53:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:53:14,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2097740059, now seen corresponding path program 16 times [2021-01-06 09:53:14,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:53:14,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867365087] [2021-01-06 09:53:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:53:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:53:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-01-06 09:53:15,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867365087] [2021-01-06 09:53:15,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301900222] [2021-01-06 09:53:15,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:53:15,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:53:15,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:53:15,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:53:15,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:53:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-01-06 09:53:15,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:53:15,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:53:15,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367150865] [2021-01-06 09:53:15,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:53:15,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:53:15,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:53:15,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:53:15,365 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2021-01-06 09:53:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:53:15,530 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-01-06 09:53:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:53:15,531 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2021-01-06 09:53:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:53:15,532 INFO L225 Difference]: With dead ends: 145 [2021-01-06 09:53:15,532 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 09:53:15,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 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 09:53:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 09:53:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-01-06 09:53:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 09:53:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-01-06 09:53:15,538 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 77 [2021-01-06 09:53:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:53:15,539 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-01-06 09:53:15,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:53:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-01-06 09:53:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 09:53:15,539 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:53:15,540 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:53:15,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:53:15,754 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:53:15,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:53:15,755 INFO L82 PathProgramCache]: Analyzing trace with hash 821162211, now seen corresponding path program 17 times [2021-01-06 09:53:15,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:53:15,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093328598] [2021-01-06 09:53:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:53:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:53:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-01-06 09:53:16,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093328598] [2021-01-06 09:53:16,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59440747] [2021-01-06 09:53:16,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true