/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-crafted/mapavg2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:35:37,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:35:37,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:35:37,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:35:37,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:35:37,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:35:37,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:35:37,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:35:37,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:35:37,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:35:37,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:35:37,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:35:37,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:35:37,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:35:37,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:35:37,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:35:37,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:35:37,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:35:37,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:35:37,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:35:37,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:35:37,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:35:37,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:35:37,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:35:37,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:35:37,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:35:37,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:35:37,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:35:37,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:35:37,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:35:37,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:35:37,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:35:37,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:35:37,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:35:37,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:35:37,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:35:37,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:35:37,202 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:35:37,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:35:37,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:35:37,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:35:37,204 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:35:37,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:35:37,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:35:37,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:35:37,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:35:37,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:35:37,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:35:37,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:35:37,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:35:37,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:35:37,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:35:37,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:35:37,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:35:37,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:35:37,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:35:37,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:35:37,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:35:37,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:35:37,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:35:37,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:35:37,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:35:37,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:35:37,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:35:37,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:35:37,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:35:37,656 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:35:37,657 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:35:37,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapavg2.i [2021-01-06 10:35:37,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e07373873/b5bd95b6f48c4aff98f918725a907917/FLAGaf893d575 [2021-01-06 10:35:38,332 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:35:38,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg2.i [2021-01-06 10:35:38,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e07373873/b5bd95b6f48c4aff98f918725a907917/FLAGaf893d575 [2021-01-06 10:35:38,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e07373873/b5bd95b6f48c4aff98f918725a907917 [2021-01-06 10:35:38,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:35:38,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:35:38,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:35:38,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:35:38,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:35:38,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:35:38" (1/1) ... [2021-01-06 10:35:38,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d9f9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38, skipping insertion in model container [2021-01-06 10:35:38,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:35:38" (1/1) ... [2021-01-06 10:35:38,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:35:38,705 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[999]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:35:38,874 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-crafted/mapavg2.i[1313,1326] [2021-01-06 10:35:38,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:35:38,886 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[3996],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:35:38,910 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-crafted/mapavg2.i[1313,1326] [2021-01-06 10:35:38,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:35:38,935 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:35:38,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38 WrapperNode [2021-01-06 10:35:38,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:35:38,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:35:38,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:35:38,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:35:38,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38" (1/1) ... [2021-01-06 10:35:38,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38" (1/1) ... [2021-01-06 10:35:39,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:35:39,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:35:39,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:35:39,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:35:39,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38" (1/1) ... [2021-01-06 10:35:39,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38" (1/1) ... [2021-01-06 10:35:39,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38" (1/1) ... [2021-01-06 10:35:39,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38" (1/1) ... [2021-01-06 10:35:39,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38" (1/1) ... [2021-01-06 10:35:39,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38" (1/1) ... [2021-01-06 10:35:39,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38" (1/1) ... [2021-01-06 10:35:39,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:35:39,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:35:39,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:35:39,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:35:39,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:35:39,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:35:39,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:35:39,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:35:39,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:35:39,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:35:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:35:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:35:39,536 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:35:39,536 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 10:35:39,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:35:39 BoogieIcfgContainer [2021-01-06 10:35:39,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:35:39,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:35:39,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:35:39,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:35:39,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:35:38" (1/3) ... [2021-01-06 10:35:39,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43047eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:35:39, skipping insertion in model container [2021-01-06 10:35:39,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:35:38" (2/3) ... [2021-01-06 10:35:39,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43047eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:35:39, skipping insertion in model container [2021-01-06 10:35:39,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:35:39" (3/3) ... [2021-01-06 10:35:39,547 INFO L111 eAbstractionObserver]: Analyzing ICFG mapavg2.i [2021-01-06 10:35:39,555 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:35:39,560 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:35:39,597 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:35:39,662 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:35:39,662 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:35:39,662 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:35:39,662 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:35:39,662 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:35:39,663 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:35:39,663 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:35:39,663 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:35:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-01-06 10:35:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:35:39,714 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:39,715 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 10:35:39,715 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:39,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-01-06 10:35:39,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:39,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477661407] [2021-01-06 10:35:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:35:39,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477661407] [2021-01-06 10:35:39,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:35:39,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:35:39,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818287340] [2021-01-06 10:35:39,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:35:39,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:39,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:35:39,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:35:39,966 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2021-01-06 10:35:40,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:40,001 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 10:35:40,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:35:40,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:35:40,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:40,013 INFO L225 Difference]: With dead ends: 52 [2021-01-06 10:35:40,013 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 10:35:40,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:35:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 10:35:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 10:35:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:35:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 10:35:40,056 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-01-06 10:35:40,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:40,056 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 10:35:40,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:35:40,056 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 10:35:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:35:40,057 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:40,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:40,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:35:40,058 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-01-06 10:35:40,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:40,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790916765] [2021-01-06 10:35:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:35:40,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790916765] [2021-01-06 10:35:40,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684415561] [2021-01-06 10:35:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:40,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:35:40,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:35:40,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:35:40,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:35:40,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285921057] [2021-01-06 10:35:40,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:35:40,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:40,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:35:40,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:35:40,419 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2021-01-06 10:35:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:40,488 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 10:35:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:35:40,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:35:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:40,492 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:35:40,492 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:35:40,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:35:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:35:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-01-06 10:35:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:35:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-01-06 10:35:40,502 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-01-06 10:35:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:40,502 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-01-06 10:35:40,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:35:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-01-06 10:35:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:35:40,504 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:40,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:40,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:35:40,718 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:40,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-01-06 10:35:40,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:40,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154363291] [2021-01-06 10:35:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:40,780 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 10:35:40,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154363291] [2021-01-06 10:35:40,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867655793] [2021-01-06 10:35:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:35:40,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:35:40,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:35:40,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:35:40,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168802366] [2021-01-06 10:35:40,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:35:40,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:40,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:35:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:35:40,914 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2021-01-06 10:35:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:40,927 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-01-06 10:35:40,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:35:40,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-01-06 10:35:40,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:40,929 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:35:40,929 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:35:40,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:35:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:35:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-01-06 10:35:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:35:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-06 10:35:40,935 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-01-06 10:35:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:40,936 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-06 10:35:40,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:35:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-06 10:35:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:35:40,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:40,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:41,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:41,152 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:41,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:41,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-01-06 10:35:41,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:41,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063790178] [2021-01-06 10:35:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:35:41,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063790178] [2021-01-06 10:35:41,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510974523] [2021-01-06 10:35:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:41,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:35:41,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:35:41,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:41,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:35:41,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210063168] [2021-01-06 10:35:41,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:35:41,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:41,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:35:41,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:35:41,362 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2021-01-06 10:35:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:41,396 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-01-06 10:35:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:35:41,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2021-01-06 10:35:41,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:41,399 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:35:41,399 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:35:41,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:35:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:35:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 10:35:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:35:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 10:35:41,410 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2021-01-06 10:35:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:41,411 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 10:35:41,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:35:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 10:35:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:35:41,413 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:41,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:41,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:41,629 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2021-01-06 10:35:41,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:41,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272649523] [2021-01-06 10:35:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:35:41,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272649523] [2021-01-06 10:35:41,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661556322] [2021-01-06 10:35:41,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:41,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:35:41,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:41,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:35:41,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:35:41,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:41,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:35:41,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137264324] [2021-01-06 10:35:41,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:35:41,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:41,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:35:41,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:35:41,844 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2021-01-06 10:35:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:41,912 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-01-06 10:35:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:35:41,912 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-01-06 10:35:41,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:41,913 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:35:41,913 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 10:35:41,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:35:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 10:35:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-01-06 10:35:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:35:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 10:35:41,919 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-01-06 10:35:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:41,920 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 10:35:41,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:35:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 10:35:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 10:35:41,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:41,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:42,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:42,137 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:42,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2021-01-06 10:35:42,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:42,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522208977] [2021-01-06 10:35:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:35:42,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522208977] [2021-01-06 10:35:42,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948103733] [2021-01-06 10:35:42,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:42,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:35:42,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:35:42,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:35:42,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:42,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 10:35:42,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085158279] [2021-01-06 10:35:42,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:35:42,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:42,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:35:42,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:35:42,470 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2021-01-06 10:35:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:42,542 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-01-06 10:35:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:35:42,543 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2021-01-06 10:35:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:42,544 INFO L225 Difference]: With dead ends: 81 [2021-01-06 10:35:42,544 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 10:35:42,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:35:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 10:35:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-01-06 10:35:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:35:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-01-06 10:35:42,550 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2021-01-06 10:35:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:42,551 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-01-06 10:35:42,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:35:42,551 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-01-06 10:35:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:35:42,552 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:42,552 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:42,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:35:42,761 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:42,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:42,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2021-01-06 10:35:42,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:42,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121378514] [2021-01-06 10:35:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:35:42,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121378514] [2021-01-06 10:35:42,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495512176] [2021-01-06 10:35:42,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:42,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:35:42,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:42,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:35:42,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:35:42,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:42,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:35:42,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135733165] [2021-01-06 10:35:42,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:35:42,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:42,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:35:42,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:35:42,988 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2021-01-06 10:35:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:43,009 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-01-06 10:35:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:35:43,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2021-01-06 10:35:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:43,011 INFO L225 Difference]: With dead ends: 86 [2021-01-06 10:35:43,011 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:35:43,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:35:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:35:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 10:35:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:35:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-01-06 10:35:43,018 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2021-01-06 10:35:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:43,018 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-01-06 10:35:43,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:35:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-01-06 10:35:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:35:43,019 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:43,020 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:43,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:43,232 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2021-01-06 10:35:43,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:43,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521992839] [2021-01-06 10:35:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:35:43,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521992839] [2021-01-06 10:35:43,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666575478] [2021-01-06 10:35:43,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:43,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:35:43,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:43,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:35:43,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 10:35:43,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:43,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 10:35:43,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555987477] [2021-01-06 10:35:43,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:35:43,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:43,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:35:43,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:35:43,523 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2021-01-06 10:35:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:43,611 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-01-06 10:35:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:35:43,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2021-01-06 10:35:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:43,612 INFO L225 Difference]: With dead ends: 97 [2021-01-06 10:35:43,613 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 10:35:43,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:35:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 10:35:43,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-01-06 10:35:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:35:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-01-06 10:35:43,620 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2021-01-06 10:35:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:43,620 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-01-06 10:35:43,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:35:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-01-06 10:35:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:35:43,621 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:43,621 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:43,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:43,827 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:43,828 INFO L82 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2021-01-06 10:35:43,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:43,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367088976] [2021-01-06 10:35:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 10:35:43,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367088976] [2021-01-06 10:35:43,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407050158] [2021-01-06 10:35:43,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:44,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:35:44,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:35:44,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:35:44,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:44,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-01-06 10:35:44,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045684918] [2021-01-06 10:35:44,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:35:44,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:44,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:35:44,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:35:44,110 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2021-01-06 10:35:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:44,167 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-01-06 10:35:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:35:44,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2021-01-06 10:35:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:44,168 INFO L225 Difference]: With dead ends: 105 [2021-01-06 10:35:44,168 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 10:35:44,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:35:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 10:35:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-01-06 10:35:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 10:35:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-01-06 10:35:44,175 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2021-01-06 10:35:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:44,176 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-01-06 10:35:44,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:35:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-01-06 10:35:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:35:44,177 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:44,177 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:44,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:35:44,392 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2021-01-06 10:35:44,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:44,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251232983] [2021-01-06 10:35:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:35:44,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251232983] [2021-01-06 10:35:44,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637363310] [2021-01-06 10:35:44,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:44,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:35:44,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:35:44,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:44,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:35:44,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442604371] [2021-01-06 10:35:44,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:35:44,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:44,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:35:44,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:35:44,678 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2021-01-06 10:35:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:44,713 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-01-06 10:35:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:35:44,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2021-01-06 10:35:44,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:44,716 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:35:44,716 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 10:35:44,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:35:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 10:35:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-01-06 10:35:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 10:35:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-01-06 10:35:44,725 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2021-01-06 10:35:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:44,726 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-01-06 10:35:44,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:35:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-01-06 10:35:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:35:44,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:44,727 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:44,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:44,941 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:44,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2021-01-06 10:35:44,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:44,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072248517] [2021-01-06 10:35:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:35:45,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072248517] [2021-01-06 10:35:45,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778641577] [2021-01-06 10:35:45,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:45,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:35:45,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:35:45,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:35:45,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:45,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:35:45,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159188306] [2021-01-06 10:35:45,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:35:45,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:45,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:35:45,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:35:45,251 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2021-01-06 10:35:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:45,283 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2021-01-06 10:35:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:35:45,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2021-01-06 10:35:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:45,284 INFO L225 Difference]: With dead ends: 110 [2021-01-06 10:35:45,284 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 10:35:45,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 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 10:35:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 10:35:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-01-06 10:35:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:35:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-01-06 10:35:45,291 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2021-01-06 10:35:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:45,292 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-01-06 10:35:45,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:35:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-01-06 10:35:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:35:45,293 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:45,293 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:45,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:45,508 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:45,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:45,509 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2021-01-06 10:35:45,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:45,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925735398] [2021-01-06 10:35:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:35:45,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925735398] [2021-01-06 10:35:45,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519236920] [2021-01-06 10:35:45,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:45,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:35:45,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:45,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:35:45,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 10:35:45,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:45,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-01-06 10:35:45,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543525697] [2021-01-06 10:35:45,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:35:45,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:45,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:35:45,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:35:45,947 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 15 states. [2021-01-06 10:35:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:46,020 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-01-06 10:35:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:35:46,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2021-01-06 10:35:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:46,022 INFO L225 Difference]: With dead ends: 115 [2021-01-06 10:35:46,022 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 10:35:46,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:35:46,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 10:35:46,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-01-06 10:35:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:35:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-01-06 10:35:46,029 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2021-01-06 10:35:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:46,029 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-01-06 10:35:46,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:35:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-01-06 10:35:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 10:35:46,031 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:46,031 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:46,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:35:46,246 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:46,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2021-01-06 10:35:46,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:46,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293813662] [2021-01-06 10:35:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:35:46,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293813662] [2021-01-06 10:35:46,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802755915] [2021-01-06 10:35:46,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:46,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:35:46,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:46,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:35:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:35:46,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:46,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:35:46,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73304473] [2021-01-06 10:35:46,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:35:46,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:46,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:35:46,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:35:46,567 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 13 states. [2021-01-06 10:35:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:46,620 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-01-06 10:35:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:35:46,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2021-01-06 10:35:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:46,624 INFO L225 Difference]: With dead ends: 118 [2021-01-06 10:35:46,624 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:35:46,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:35:46,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:35:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-01-06 10:35:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:35:46,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-01-06 10:35:46,631 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2021-01-06 10:35:46,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:46,631 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-01-06 10:35:46,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:35:46,631 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-01-06 10:35:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:35:46,632 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:46,632 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:46,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:35:46,846 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:46,847 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2021-01-06 10:35:46,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:46,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116862641] [2021-01-06 10:35:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:35:47,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116862641] [2021-01-06 10:35:47,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079835922] [2021-01-06 10:35:47,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:47,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:35:47,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:35:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:35:47,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:47,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:35:47,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999667656] [2021-01-06 10:35:47,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:35:47,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:47,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:35:47,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:35:47,482 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2021-01-06 10:35:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:47,528 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-01-06 10:35:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:35:47,529 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2021-01-06 10:35:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:47,530 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:35:47,530 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 10:35:47,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:35:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 10:35:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-01-06 10:35:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:35:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-01-06 10:35:47,548 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2021-01-06 10:35:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:47,549 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-01-06 10:35:47,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:35:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-01-06 10:35:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:35:47,551 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:47,551 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:47,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:35:47,769 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2021-01-06 10:35:47,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:47,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89542076] [2021-01-06 10:35:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:35:47,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89542076] [2021-01-06 10:35:47,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476226954] [2021-01-06 10:35:47,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:48,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:35:48,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:48,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:35:48,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 10:35:48,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:48,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-01-06 10:35:48,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523084161] [2021-01-06 10:35:48,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:35:48,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:48,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:35:48,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:35:48,449 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2021-01-06 10:35:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:48,535 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-01-06 10:35:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:35:48,535 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2021-01-06 10:35:48,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:48,536 INFO L225 Difference]: With dead ends: 125 [2021-01-06 10:35:48,536 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 10:35:48,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:35:48,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 10:35:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-01-06 10:35:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 10:35:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-01-06 10:35:48,541 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2021-01-06 10:35:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:48,541 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-01-06 10:35:48,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:35:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-01-06 10:35:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:35:48,542 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:48,542 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:48,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:48,757 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:48,758 INFO L82 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2021-01-06 10:35:48,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:48,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821658392] [2021-01-06 10:35:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:35:48,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821658392] [2021-01-06 10:35:48,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426871637] [2021-01-06 10:35:48,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:49,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:35:49,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:35:49,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:49,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:35:49,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152653510] [2021-01-06 10:35:49,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:35:49,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:49,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:35:49,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:35:49,089 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 16 states. [2021-01-06 10:35:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:49,148 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-01-06 10:35:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:35:49,149 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2021-01-06 10:35:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:49,150 INFO L225 Difference]: With dead ends: 128 [2021-01-06 10:35:49,150 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 10:35:49,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:35:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 10:35:49,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-01-06 10:35:49,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 10:35:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-01-06 10:35:49,154 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2021-01-06 10:35:49,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:49,155 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-01-06 10:35:49,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:35:49,155 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-01-06 10:35:49,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 10:35:49,156 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:49,156 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:49,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:35:49,371 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:49,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2021-01-06 10:35:49,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:49,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322616536] [2021-01-06 10:35:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:35:49,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322616536] [2021-01-06 10:35:49,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093738594] [2021-01-06 10:35:49,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:49,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:35:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:49,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:35:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:35:49,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:49,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:35:49,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532583417] [2021-01-06 10:35:49,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:35:49,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:49,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:35:49,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:35:49,812 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2021-01-06 10:35:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:49,867 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-01-06 10:35:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:35:49,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2021-01-06 10:35:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:49,870 INFO L225 Difference]: With dead ends: 130 [2021-01-06 10:35:49,870 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 10:35:49,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:35:49,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 10:35:49,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-01-06 10:35:49,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 10:35:49,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-01-06 10:35:49,878 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2021-01-06 10:35:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:49,879 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-01-06 10:35:49,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:35:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-01-06 10:35:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:35:49,880 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:49,881 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:50,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:35:50,097 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:50,098 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2021-01-06 10:35:50,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:50,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79190571] [2021-01-06 10:35:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:35:50,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79190571] [2021-01-06 10:35:50,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558285895] [2021-01-06 10:35:50,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:50,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:35:50,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:50,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:35:50,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-01-06 10:35:50,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:50,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-01-06 10:35:50,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673550139] [2021-01-06 10:35:50,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:35:50,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:50,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:35:50,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:35:50,634 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 22 states. [2021-01-06 10:35:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:50,804 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-01-06 10:35:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:35:50,804 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 79 [2021-01-06 10:35:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:50,805 INFO L225 Difference]: With dead ends: 141 [2021-01-06 10:35:50,806 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 10:35:50,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:35:50,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 10:35:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-01-06 10:35:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:35:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-01-06 10:35:50,810 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2021-01-06 10:35:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:50,810 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-01-06 10:35:50,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:35:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-01-06 10:35:50,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 10:35:50,811 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:50,811 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:51,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:35:51,014 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:51,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:51,015 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2021-01-06 10:35:51,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:51,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883991913] [2021-01-06 10:35:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:35:51,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883991913] [2021-01-06 10:35:51,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372972848] [2021-01-06 10:35:51,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:51,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:35:51,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:51,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:35:51,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:35:51,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:51,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:35:51,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70881637] [2021-01-06 10:35:51,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:35:51,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:35:51,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:35:51,454 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 19 states. [2021-01-06 10:35:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:51,530 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-01-06 10:35:51,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:35:51,530 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2021-01-06 10:35:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:51,531 INFO L225 Difference]: With dead ends: 146 [2021-01-06 10:35:51,531 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 10:35:51,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:35:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 10:35:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-01-06 10:35:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 10:35:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-01-06 10:35:51,536 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2021-01-06 10:35:51,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:51,537 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-01-06 10:35:51,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:35:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-01-06 10:35:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:35:51,538 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:51,538 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:51,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:51,752 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:51,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:51,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2021-01-06 10:35:51,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:51,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860037898] [2021-01-06 10:35:51,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:35:51,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860037898] [2021-01-06 10:35:51,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018621970] [2021-01-06 10:35:51,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:52,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 10:35:52,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:52,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:35:52,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:35:52,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:52,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:35:52,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231855889] [2021-01-06 10:35:52,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:35:52,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:52,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:35:52,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:35:52,959 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2021-01-06 10:35:53,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:53,022 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2021-01-06 10:35:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:35:53,022 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2021-01-06 10:35:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:53,023 INFO L225 Difference]: With dead ends: 148 [2021-01-06 10:35:53,023 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:35:53,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 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 10:35:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:35:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-01-06 10:35:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:35:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-01-06 10:35:53,028 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2021-01-06 10:35:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:53,028 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-01-06 10:35:53,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:35:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-01-06 10:35:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:35:53,029 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:53,029 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:53,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:53,242 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:53,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2021-01-06 10:35:53,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:53,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108482131] [2021-01-06 10:35:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:35:53,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108482131] [2021-01-06 10:35:53,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025012479] [2021-01-06 10:35:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:54,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 10:35:54,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:54,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:35:54,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-01-06 10:35:54,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:54,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-01-06 10:35:54,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811586609] [2021-01-06 10:35:54,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:35:54,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:54,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:35:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:35:54,480 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 26 states. [2021-01-06 10:35:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:54,671 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-01-06 10:35:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:35:54,672 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2021-01-06 10:35:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:54,673 INFO L225 Difference]: With dead ends: 159 [2021-01-06 10:35:54,673 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:35:54,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:35:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:35:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-01-06 10:35:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 10:35:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-01-06 10:35:54,678 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2021-01-06 10:35:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:54,678 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-01-06 10:35:54,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:35:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-01-06 10:35:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 10:35:54,679 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:54,679 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:54,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:35:54,894 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2021-01-06 10:35:54,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:54,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872153657] [2021-01-06 10:35:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:35:55,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872153657] [2021-01-06 10:35:55,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786212344] [2021-01-06 10:35:55,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:55,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:35:55,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:35:55,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:55,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:35:55,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245249535] [2021-01-06 10:35:55,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:35:55,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:55,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:35:55,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:35:55,416 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 22 states. [2021-01-06 10:35:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:55,493 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2021-01-06 10:35:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:35:55,496 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2021-01-06 10:35:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:55,497 INFO L225 Difference]: With dead ends: 164 [2021-01-06 10:35:55,497 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 10:35:55,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:35:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 10:35:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-01-06 10:35:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 10:35:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-01-06 10:35:55,503 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2021-01-06 10:35:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:55,503 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-01-06 10:35:55,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:35:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-01-06 10:35:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:35:55,504 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:55,504 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:55,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:35:55,718 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2021-01-06 10:35:55,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:55,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438951910] [2021-01-06 10:35:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:35:56,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438951910] [2021-01-06 10:35:56,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725859860] [2021-01-06 10:35:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:56,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:35:56,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:56,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:35:56,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:35:56,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:56,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 10:35:56,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171869173] [2021-01-06 10:35:56,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:35:56,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:56,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:35:56,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:35:56,254 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2021-01-06 10:35:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:56,330 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2021-01-06 10:35:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:35:56,331 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2021-01-06 10:35:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:56,331 INFO L225 Difference]: With dead ends: 166 [2021-01-06 10:35:56,331 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 10:35:56,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:35:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 10:35:56,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-01-06 10:35:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 10:35:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-01-06 10:35:56,337 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2021-01-06 10:35:56,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:56,337 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-01-06 10:35:56,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:35:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-01-06 10:35:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-06 10:35:56,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:56,338 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:56,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:56,553 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2021-01-06 10:35:56,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:56,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172319987] [2021-01-06 10:35:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:35:56,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172319987] [2021-01-06 10:35:56,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132551490] [2021-01-06 10:35:56,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:57,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:35:57,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:57,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:35:57,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-01-06 10:35:57,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:57,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2021-01-06 10:35:57,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411721230] [2021-01-06 10:35:57,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:35:57,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:57,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:35:57,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:35:57,372 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 29 states. [2021-01-06 10:35:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:57,500 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2021-01-06 10:35:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:35:57,500 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 103 [2021-01-06 10:35:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:57,501 INFO L225 Difference]: With dead ends: 171 [2021-01-06 10:35:57,501 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 10:35:57,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:35:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 10:35:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-01-06 10:35:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:35:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-01-06 10:35:57,507 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2021-01-06 10:35:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:57,507 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-01-06 10:35:57,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:35:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-01-06 10:35:57,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 10:35:57,508 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:57,508 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:57,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:35:57,723 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:57,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:57,724 INFO L82 PathProgramCache]: Analyzing trace with hash 676687458, now seen corresponding path program 22 times [2021-01-06 10:35:57,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:57,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220212119] [2021-01-06 10:35:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 10:35:58,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220212119] [2021-01-06 10:35:58,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141973416] [2021-01-06 10:35:58,088 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:58,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:35:58,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:58,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:35:58,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2021-01-06 10:35:58,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:58,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 31 [2021-01-06 10:35:58,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217315000] [2021-01-06 10:35:58,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:35:58,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:58,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:35:58,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:35:58,448 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 31 states. [2021-01-06 10:35:58,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:58,570 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2021-01-06 10:35:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 10:35:58,571 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 107 [2021-01-06 10:35:58,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:58,572 INFO L225 Difference]: With dead ends: 177 [2021-01-06 10:35:58,572 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 10:35:58,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:35:58,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 10:35:58,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2021-01-06 10:35:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 10:35:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-01-06 10:35:58,577 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2021-01-06 10:35:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:58,577 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-01-06 10:35:58,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:35:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-01-06 10:35:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:35:58,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:58,578 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:58,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:58,792 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1973169506, now seen corresponding path program 23 times [2021-01-06 10:35:58,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:58,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022133043] [2021-01-06 10:35:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-01-06 10:35:59,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022133043] [2021-01-06 10:35:59,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892528110] [2021-01-06 10:35:59,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:02,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-01-06 10:36:02,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:36:02,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:36:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-01-06 10:36:03,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:03,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2021-01-06 10:36:03,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320823128] [2021-01-06 10:36:03,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:36:03,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:03,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:36:03,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:36:03,122 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 32 states. [2021-01-06 10:36:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:03,363 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2021-01-06 10:36:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:36:03,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 111 [2021-01-06 10:36:03,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:03,365 INFO L225 Difference]: With dead ends: 189 [2021-01-06 10:36:03,365 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 10:36:03,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:36:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 10:36:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2021-01-06 10:36:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 10:36:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-01-06 10:36:03,370 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2021-01-06 10:36:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:03,370 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-01-06 10:36:03,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:36:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-01-06 10:36:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 10:36:03,371 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:03,371 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:03,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:36:03,585 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:03,586 INFO L82 PathProgramCache]: Analyzing trace with hash 41685082, now seen corresponding path program 24 times [2021-01-06 10:36:03,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:03,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960712179] [2021-01-06 10:36:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:36:04,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960712179] [2021-01-06 10:36:04,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585557352] [2021-01-06 10:36:04,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:05,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 10:36:05,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:36:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:36:05,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-01-06 10:36:05,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:05,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2021-01-06 10:36:05,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045907985] [2021-01-06 10:36:05,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:36:05,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:05,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:36:05,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:36:05,494 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 34 states. [2021-01-06 10:36:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:05,714 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2021-01-06 10:36:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:36:05,715 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 119 [2021-01-06 10:36:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:05,717 INFO L225 Difference]: With dead ends: 203 [2021-01-06 10:36:05,717 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 10:36:05,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:36:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 10:36:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2021-01-06 10:36:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 10:36:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2021-01-06 10:36:05,722 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2021-01-06 10:36:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:05,723 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2021-01-06 10:36:05,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:36:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2021-01-06 10:36:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-01-06 10:36:05,724 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:05,724 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:05,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:36:05,939 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:05,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 25 times [2021-01-06 10:36:05,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:05,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475789891] [2021-01-06 10:36:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:36:06,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475789891] [2021-01-06 10:36:06,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705182072] [2021-01-06 10:36:06,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:06,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:36:06,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:36:06,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:06,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:36:06,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835764003] [2021-01-06 10:36:06,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:36:06,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:06,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:36:06,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:36:06,658 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2021-01-06 10:36:06,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:06,750 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2021-01-06 10:36:06,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:36:06,750 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2021-01-06 10:36:06,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:06,751 INFO L225 Difference]: With dead ends: 208 [2021-01-06 10:36:06,751 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 10:36:06,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:36:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 10:36:06,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-01-06 10:36:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 10:36:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2021-01-06 10:36:06,756 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2021-01-06 10:36:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:06,757 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2021-01-06 10:36:06,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:36:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2021-01-06 10:36:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-01-06 10:36:06,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:06,758 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:06,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:36:06,974 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:06,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:06,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 26 times [2021-01-06 10:36:06,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:06,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4518976] [2021-01-06 10:36:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:36:07,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4518976] [2021-01-06 10:36:07,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028355317] [2021-01-06 10:36:07,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:07,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:36:07,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:36:07,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:36:07,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:36:07,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:07,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:36:07,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048386954] [2021-01-06 10:36:07,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:36:07,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:07,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:36:07,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:36:07,767 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 29 states. [2021-01-06 10:36:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:07,866 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2021-01-06 10:36:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:36:07,866 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2021-01-06 10:36:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:07,867 INFO L225 Difference]: With dead ends: 210 [2021-01-06 10:36:07,867 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 10:36:07,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:36:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 10:36:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-01-06 10:36:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 10:36:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-01-06 10:36:07,873 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2021-01-06 10:36:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:07,874 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-01-06 10:36:07,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:36:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-01-06 10:36:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 10:36:07,875 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:07,875 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:08,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:36:08,089 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:08,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1805967086, now seen corresponding path program 27 times [2021-01-06 10:36:08,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:08,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738598027] [2021-01-06 10:36:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:36:08,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738598027] [2021-01-06 10:36:08,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828525598] [2021-01-06 10:36:08,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:09,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:36:09,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:36:09,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:36:09,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2021-01-06 10:36:09,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:09,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2021-01-06 10:36:09,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247430555] [2021-01-06 10:36:09,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:36:09,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:09,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:36:09,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:36:09,438 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 37 states. [2021-01-06 10:36:09,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:09,642 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2021-01-06 10:36:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:36:09,643 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 131 [2021-01-06 10:36:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:09,644 INFO L225 Difference]: With dead ends: 215 [2021-01-06 10:36:09,644 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 10:36:09,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:36:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 10:36:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-01-06 10:36:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 10:36:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-01-06 10:36:09,650 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 131 [2021-01-06 10:36:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:09,650 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-01-06 10:36:09,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:36:09,650 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-01-06 10:36:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:36:09,651 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:09,651 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:09,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:09,865 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:09,866 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 28 times [2021-01-06 10:36:09,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:09,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559484251] [2021-01-06 10:36:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:36:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559484251] [2021-01-06 10:36:10,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080464530] [2021-01-06 10:36:10,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:10,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:36:10,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:36:10,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:36:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:36:10,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:10,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 10:36:10,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650716359] [2021-01-06 10:36:10,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:36:10,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:10,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:36:10,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:36:10,723 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2021-01-06 10:36:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:10,832 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2021-01-06 10:36:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:36:10,833 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2021-01-06 10:36:10,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:10,834 INFO L225 Difference]: With dead ends: 218 [2021-01-06 10:36:10,834 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 10:36:10,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:36:10,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 10:36:10,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-01-06 10:36:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 10:36:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-01-06 10:36:10,840 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2021-01-06 10:36:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:10,840 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-01-06 10:36:10,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:36:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-01-06 10:36:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-01-06 10:36:10,841 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:10,841 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:11,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:11,055 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:11,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 29 times [2021-01-06 10:36:11,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:11,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730888959] [2021-01-06 10:36:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:36:11,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730888959] [2021-01-06 10:36:11,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888147364] [2021-01-06 10:36:11,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:22,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-01-06 10:36:22,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:36:22,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:36:22,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2021-01-06 10:36:23,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:23,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2021-01-06 10:36:23,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045259671] [2021-01-06 10:36:23,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:36:23,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:23,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:36:23,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:36:23,230 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2021-01-06 10:36:23,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:23,424 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2021-01-06 10:36:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:36:23,425 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2021-01-06 10:36:23,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:23,426 INFO L225 Difference]: With dead ends: 223 [2021-01-06 10:36:23,426 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 10:36:23,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:36:23,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 10:36:23,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2021-01-06 10:36:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 10:36:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2021-01-06 10:36:23,432 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 137 [2021-01-06 10:36:23,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:23,432 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2021-01-06 10:36:23,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:36:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2021-01-06 10:36:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-01-06 10:36:23,433 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:23,434 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:23,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:23,647 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:23,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:23,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1798907208, now seen corresponding path program 30 times [2021-01-06 10:36:23,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:23,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835583937] [2021-01-06 10:36:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-01-06 10:36:24,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835583937] [2021-01-06 10:36:24,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960581604] [2021-01-06 10:36:24,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:26,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 10:36:26,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:36:26,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:36:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2021-01-06 10:36:27,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:27,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2021-01-06 10:36:27,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902395261] [2021-01-06 10:36:27,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:36:27,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:27,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:36:27,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:36:27,168 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 41 states. [2021-01-06 10:36:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:27,513 INFO L93 Difference]: Finished difference Result 235 states and 246 transitions. [2021-01-06 10:36:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:36:27,514 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 141 [2021-01-06 10:36:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:27,515 INFO L225 Difference]: With dead ends: 235 [2021-01-06 10:36:27,515 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 10:36:27,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:36:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 10:36:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2021-01-06 10:36:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2021-01-06 10:36:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-01-06 10:36:27,521 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 141 [2021-01-06 10:36:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:27,521 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-01-06 10:36:27,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:36:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-01-06 10:36:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-01-06 10:36:27,522 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:27,522 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:27,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:36:27,731 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:27,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:27,732 INFO L82 PathProgramCache]: Analyzing trace with hash 308754692, now seen corresponding path program 31 times [2021-01-06 10:36:27,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:27,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716381709] [2021-01-06 10:36:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:36:28,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716381709] [2021-01-06 10:36:28,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673849964] [2021-01-06 10:36:28,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:36:28,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:36:28,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:28,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 10:36:28,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220398890] [2021-01-06 10:36:28,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:36:28,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:28,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:36:28,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:36:28,750 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 34 states. [2021-01-06 10:36:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:28,862 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2021-01-06 10:36:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:36:28,863 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2021-01-06 10:36:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:28,864 INFO L225 Difference]: With dead ends: 240 [2021-01-06 10:36:28,864 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 10:36:28,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:36:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 10:36:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-01-06 10:36:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 10:36:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-01-06 10:36:28,869 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2021-01-06 10:36:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:28,869 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-01-06 10:36:28,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:36:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-01-06 10:36:28,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 10:36:28,870 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:28,871 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:29,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:29,072 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash -747071166, now seen corresponding path program 32 times [2021-01-06 10:36:29,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:29,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026489014] [2021-01-06 10:36:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:36:29,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026489014] [2021-01-06 10:36:29,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299280553] [2021-01-06 10:36:29,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:29,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:36:29,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:36:29,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:36:29,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:36:30,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:30,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 10:36:30,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208521554] [2021-01-06 10:36:30,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:36:30,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:30,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:36:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:36:30,088 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 35 states. [2021-01-06 10:36:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:30,226 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2021-01-06 10:36:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:36:30,226 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 151 [2021-01-06 10:36:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:30,227 INFO L225 Difference]: With dead ends: 242 [2021-01-06 10:36:30,227 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 10:36:30,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:36:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 10:36:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-01-06 10:36:30,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 10:36:30,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2021-01-06 10:36:30,233 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2021-01-06 10:36:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:30,234 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2021-01-06 10:36:30,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:36:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2021-01-06 10:36:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 10:36:30,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:30,235 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:30,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:36:30,444 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1783438848, now seen corresponding path program 33 times [2021-01-06 10:36:30,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:30,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973025338] [2021-01-06 10:36:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:36:31,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973025338] [2021-01-06 10:36:31,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265129765] [2021-01-06 10:36:31,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:31,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:36:31,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:36:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:36:31,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2021-01-06 10:36:32,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:32,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 12] total 45 [2021-01-06 10:36:32,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201309264] [2021-01-06 10:36:32,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 10:36:32,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:32,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 10:36:32,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:36:32,347 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 45 states. [2021-01-06 10:36:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:32,731 INFO L93 Difference]: Finished difference Result 253 states and 264 transitions. [2021-01-06 10:36:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 10:36:32,731 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 153 [2021-01-06 10:36:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:32,732 INFO L225 Difference]: With dead ends: 253 [2021-01-06 10:36:32,733 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 10:36:32,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:36:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 10:36:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2021-01-06 10:36:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 10:36:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2021-01-06 10:36:32,738 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 153 [2021-01-06 10:36:32,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:32,738 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2021-01-06 10:36:32,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 10:36:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2021-01-06 10:36:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 10:36:32,739 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:32,739 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:32,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:32,940 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:32,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:32,941 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 34 times [2021-01-06 10:36:32,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:32,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241691289] [2021-01-06 10:36:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-01-06 10:36:33,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241691289] [2021-01-06 10:36:33,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114777281] [2021-01-06 10:36:33,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:33,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:36:33,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:36:33,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:36:33,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:36:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2021-01-06 10:36:34,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:36:34,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2021-01-06 10:36:34,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010819539] [2021-01-06 10:36:34,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:36:34,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:36:34,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:36:34,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:36:34,311 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 47 states. [2021-01-06 10:36:34,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:34,619 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2021-01-06 10:36:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:36:34,620 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 161 [2021-01-06 10:36:34,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:34,621 INFO L225 Difference]: With dead ends: 267 [2021-01-06 10:36:34,621 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 10:36:34,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:36:34,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 10:36:34,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2021-01-06 10:36:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 10:36:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2021-01-06 10:36:34,626 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2021-01-06 10:36:34,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:34,627 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2021-01-06 10:36:34,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:36:34,627 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2021-01-06 10:36:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-01-06 10:36:34,628 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:34,628 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:34,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:36:34,831 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:34,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:34,832 INFO L82 PathProgramCache]: Analyzing trace with hash -628416392, now seen corresponding path program 35 times [2021-01-06 10:36:34,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:34,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618156041] [2021-01-06 10:36:34,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-01-06 10:36:35,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618156041] [2021-01-06 10:36:35,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670626649] [2021-01-06 10:36:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:36,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-01-06 10:37:36,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:36,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:37:36,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2021-01-06 10:37:37,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:37,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2021-01-06 10:37:37,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979754968] [2021-01-06 10:37:37,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 10:37:37,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:37,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 10:37:37,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:37:37,331 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 49 states. [2021-01-06 10:37:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:37,752 INFO L93 Difference]: Finished difference Result 281 states and 292 transitions. [2021-01-06 10:37:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 10:37:37,753 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2021-01-06 10:37:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:37,754 INFO L225 Difference]: With dead ends: 281 [2021-01-06 10:37:37,754 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 10:37:37,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:37:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 10:37:37,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2021-01-06 10:37:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 10:37:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-01-06 10:37:37,761 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2021-01-06 10:37:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:37,761 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-01-06 10:37:37,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 10:37:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-01-06 10:37:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-01-06 10:37:37,762 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:37,763 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:37,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:37:37,963 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1809286964, now seen corresponding path program 36 times [2021-01-06 10:37:37,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:37,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583760789] [2021-01-06 10:37:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-01-06 10:37:38,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583760789] [2021-01-06 10:37:38,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792953907] [2021-01-06 10:37:38,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:42,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:37:42,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:37:42,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2021-01-06 10:37:43,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:43,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2021-01-06 10:37:43,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801862862] [2021-01-06 10:37:43,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 10:37:43,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 10:37:43,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:37:43,104 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 48 states. [2021-01-06 10:37:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:43,364 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2021-01-06 10:37:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 10:37:43,365 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 177 [2021-01-06 10:37:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:43,366 INFO L225 Difference]: With dead ends: 289 [2021-01-06 10:37:43,366 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 10:37:43,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:37:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 10:37:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2021-01-06 10:37:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 10:37:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2021-01-06 10:37:43,373 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 177 [2021-01-06 10:37:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:43,373 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2021-01-06 10:37:43,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 10:37:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2021-01-06 10:37:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 10:37:43,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:43,374 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:43,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:37:43,588 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:43,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1693026416, now seen corresponding path program 37 times [2021-01-06 10:37:43,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:43,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653737486] [2021-01-06 10:37:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:37:44,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653737486] [2021-01-06 10:37:44,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209858438] [2021-01-06 10:37:44,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:37:44,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:37:44,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:44,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 10:37:44,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677138975] [2021-01-06 10:37:44,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:37:44,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:44,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:37:44,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:37:44,920 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 40 states. [2021-01-06 10:37:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:45,084 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2021-01-06 10:37:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:37:45,084 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 181 [2021-01-06 10:37:45,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:45,088 INFO L225 Difference]: With dead ends: 292 [2021-01-06 10:37:45,088 INFO L226 Difference]: Without dead ends: 185 [2021-01-06 10:37:45,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:37:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-01-06 10:37:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-01-06 10:37:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 10:37:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2021-01-06 10:37:45,098 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2021-01-06 10:37:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:45,098 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2021-01-06 10:37:45,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:37:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2021-01-06 10:37:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-01-06 10:37:45,099 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:45,099 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:45,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:37:45,313 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:45,314 INFO L82 PathProgramCache]: Analyzing trace with hash 45772974, now seen corresponding path program 38 times [2021-01-06 10:37:45,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:45,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824990621] [2021-01-06 10:37:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:37:46,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824990621] [2021-01-06 10:37:46,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196068534] [2021-01-06 10:37:46,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:46,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:37:46,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:46,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:37:46,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:37:46,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:46,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 10:37:46,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335470477] [2021-01-06 10:37:46,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:37:46,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:46,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:37:46,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:37:46,707 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 41 states. [2021-01-06 10:37:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:46,857 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2021-01-06 10:37:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:37:46,858 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 183 [2021-01-06 10:37:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:46,859 INFO L225 Difference]: With dead ends: 294 [2021-01-06 10:37:46,859 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 10:37:46,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:37:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 10:37:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-01-06 10:37:46,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 10:37:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2021-01-06 10:37:46,865 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2021-01-06 10:37:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:46,865 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2021-01-06 10:37:46,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:37:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2021-01-06 10:37:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-01-06 10:37:46,866 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:46,867 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:47,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:47,082 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1878147436, now seen corresponding path program 39 times [2021-01-06 10:37:47,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:47,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981578889] [2021-01-06 10:37:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:37:48,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981578889] [2021-01-06 10:37:48,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107250954] [2021-01-06 10:37:48,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:49,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 10:37:49,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:49,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:37:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2021-01-06 10:37:49,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:49,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2021-01-06 10:37:49,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480062032] [2021-01-06 10:37:49,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 10:37:49,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:49,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 10:37:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:37:49,574 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 52 states. [2021-01-06 10:37:49,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:49,846 INFO L93 Difference]: Finished difference Result 299 states and 308 transitions. [2021-01-06 10:37:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 10:37:49,846 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 185 [2021-01-06 10:37:49,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:49,848 INFO L225 Difference]: With dead ends: 299 [2021-01-06 10:37:49,848 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 10:37:49,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:37:49,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 10:37:49,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-01-06 10:37:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-01-06 10:37:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2021-01-06 10:37:49,857 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 185 [2021-01-06 10:37:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:49,859 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2021-01-06 10:37:49,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 10:37:49,859 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2021-01-06 10:37:49,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-01-06 10:37:49,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:49,860 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:50,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 10:37:50,074 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:50,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:50,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1682311512, now seen corresponding path program 40 times [2021-01-06 10:37:50,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:50,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613631936] [2021-01-06 10:37:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-01-06 10:37:51,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613631936] [2021-01-06 10:37:51,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015287533] [2021-01-06 10:37:51,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:51,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:37:51,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:51,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:37:51,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2021-01-06 10:37:51,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:51,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2021-01-06 10:37:51,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945661447] [2021-01-06 10:37:51,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 10:37:51,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 10:37:51,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:37:51,839 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 54 states. [2021-01-06 10:37:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:52,076 INFO L93 Difference]: Finished difference Result 305 states and 314 transitions. [2021-01-06 10:37:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 10:37:52,076 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 189 [2021-01-06 10:37:52,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:52,082 INFO L225 Difference]: With dead ends: 305 [2021-01-06 10:37:52,082 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 10:37:52,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:37:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 10:37:52,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2021-01-06 10:37:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-01-06 10:37:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2021-01-06 10:37:52,089 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 189 [2021-01-06 10:37:52,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:52,091 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2021-01-06 10:37:52,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 10:37:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2021-01-06 10:37:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-01-06 10:37:52,093 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:52,093 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:52,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:52,307 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:52,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1750482404, now seen corresponding path program 41 times [2021-01-06 10:37:52,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:52,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027803691] [2021-01-06 10:37:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 10:37:53,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027803691] [2021-01-06 10:37:53,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443687351] [2021-01-06 10:37:53,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true