/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-industry-pattern/array_ptr_single_elem_init-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:17:11,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:17:11,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:17:11,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:17:11,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:17:11,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:17:11,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:17:11,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:17:11,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:17:11,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:17:11,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:17:11,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:17:11,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:17:11,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:17:11,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:17:11,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:17:11,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:17:11,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:17:11,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:17:11,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:17:11,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:17:11,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:17:11,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:17:11,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:17:11,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:17:11,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:17:11,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:17:11,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:17:11,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:17:11,278 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:17:11,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:17:11,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:17:11,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:17:11,283 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:17:11,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:17:11,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:17:11,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:17:11,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:17:11,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:17:11,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:17:11,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:17:11,286 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:17:11,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:17:11,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:17:11,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:17:11,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:17:11,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:17:11,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:17:11,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:17:11,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:17:11,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:17:11,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:17:11,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:17:11,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:17:11,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:17:11,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:17:11,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:17:11,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:17:11,737 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:17:11,738 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:17:11,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2020-12-23 00:17:11,838 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/50faea961/0bb52c5aec574cff85c25222fb723316/FLAGa796d20d0 [2020-12-23 00:17:12,516 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:17:12,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2020-12-23 00:17:12,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/50faea961/0bb52c5aec574cff85c25222fb723316/FLAGa796d20d0 [2020-12-23 00:17:12,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/50faea961/0bb52c5aec574cff85c25222fb723316 [2020-12-23 00:17:12,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:17:12,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:17:12,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:17:12,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:17:12,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:17:12,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:17:12" (1/1) ... [2020-12-23 00:17:12,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@266203ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:12, skipping insertion in model container [2020-12-23 00:17:12,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:17:12" (1/1) ... [2020-12-23 00:17:12,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:17:12,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:17:13,102 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-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~s~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IntegerLiteral[3]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:17:13,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:17:13,144 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:17:13,161 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-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~s~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[24],StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:17:13,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:17:13,191 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:17:13,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13 WrapperNode [2020-12-23 00:17:13,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:17:13,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:17:13,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:17:13,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:17:13,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13" (1/1) ... [2020-12-23 00:17:13,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13" (1/1) ... [2020-12-23 00:17:13,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:17:13,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:17:13,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:17:13,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:17:13,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13" (1/1) ... [2020-12-23 00:17:13,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13" (1/1) ... [2020-12-23 00:17:13,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13" (1/1) ... [2020-12-23 00:17:13,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13" (1/1) ... [2020-12-23 00:17:13,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13" (1/1) ... [2020-12-23 00:17:13,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13" (1/1) ... [2020-12-23 00:17:13,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13" (1/1) ... [2020-12-23 00:17:13,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:17:13,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:17:13,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:17:13,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:17:13,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13" (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 [2020-12-23 00:17:13,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 00:17:13,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:17:13,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 00:17:13,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:17:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:17:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 00:17:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:17:13,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:17:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:17:13,947 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:17:13,947 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 00:17:13,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:17:13 BoogieIcfgContainer [2020-12-23 00:17:13,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:17:13,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:17:13,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:17:13,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:17:13,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:17:12" (1/3) ... [2020-12-23 00:17:13,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec18e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:17:13, skipping insertion in model container [2020-12-23 00:17:13,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:13" (2/3) ... [2020-12-23 00:17:13,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec18e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:17:13, skipping insertion in model container [2020-12-23 00:17:13,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:17:13" (3/3) ... [2020-12-23 00:17:13,965 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-1.i [2020-12-23 00:17:13,972 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:17:13,978 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:17:14,003 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:17:14,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:17:14,052 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:17:14,052 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:17:14,052 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:17:14,052 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:17:14,052 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:17:14,053 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:17:14,053 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:17:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 00:17:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:17:14,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:14,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:14,087 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:14,095 INFO L82 PathProgramCache]: Analyzing trace with hash -739796340, now seen corresponding path program 1 times [2020-12-23 00:17:14,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:14,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034479049] [2020-12-23 00:17:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:14,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034479049] [2020-12-23 00:17:14,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:17:14,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:17:14,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882018724] [2020-12-23 00:17:14,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:17:14,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:14,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:17:14,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:17:14,326 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 00:17:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:14,344 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2020-12-23 00:17:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:17:14,346 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 00:17:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:14,356 INFO L225 Difference]: With dead ends: 34 [2020-12-23 00:17:14,357 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 00:17:14,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:17:14,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 00:17:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 00:17:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 00:17:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2020-12-23 00:17:14,400 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 9 [2020-12-23 00:17:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:14,400 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2020-12-23 00:17:14,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:17:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2020-12-23 00:17:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:17:14,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:14,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:14,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:17:14,403 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:14,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1452551885, now seen corresponding path program 1 times [2020-12-23 00:17:14,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:14,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308132278] [2020-12-23 00:17:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:14,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308132278] [2020-12-23 00:17:14,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:17:14,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:17:14,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333158965] [2020-12-23 00:17:14,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:17:14,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:14,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:17:14,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:17:14,476 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand 3 states. [2020-12-23 00:17:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:14,529 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-12-23 00:17:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:17:14,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 00:17:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:14,531 INFO L225 Difference]: With dead ends: 40 [2020-12-23 00:17:14,531 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:17:14,532 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 [2020-12-23 00:17:14,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:17:14,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2020-12-23 00:17:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 00:17:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2020-12-23 00:17:14,538 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 9 [2020-12-23 00:17:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:14,539 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2020-12-23 00:17:14,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:17:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2020-12-23 00:17:14,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:17:14,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:14,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:14,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:17:14,541 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:14,541 INFO L82 PathProgramCache]: Analyzing trace with hash 479393663, now seen corresponding path program 1 times [2020-12-23 00:17:14,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:14,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652505884] [2020-12-23 00:17:14,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:14,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652505884] [2020-12-23 00:17:14,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:17:14,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:17:14,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608711864] [2020-12-23 00:17:14,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:17:14,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:14,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:17:14,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:17:14,625 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand 3 states. [2020-12-23 00:17:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:14,666 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2020-12-23 00:17:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:17:14,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-23 00:17:14,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:14,668 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:17:14,669 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:17:14,669 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 [2020-12-23 00:17:14,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:17:14,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 19. [2020-12-23 00:17:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:17:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2020-12-23 00:17:14,675 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 14 [2020-12-23 00:17:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:14,676 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-12-23 00:17:14,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:17:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-12-23 00:17:14,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:17:14,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:14,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:14,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 00:17:14,678 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:14,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:14,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1180458241, now seen corresponding path program 1 times [2020-12-23 00:17:14,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:14,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857032302] [2020-12-23 00:17:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:14,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857032302] [2020-12-23 00:17:14,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305065800] [2020-12-23 00:17:14,753 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 [2020-12-23 00:17:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:14,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:17:14,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:17:14,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:17:14,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:17:14,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780566077] [2020-12-23 00:17:14,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:17:14,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:14,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:17:14,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:17:14,885 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 3 states. [2020-12-23 00:17:14,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:14,897 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2020-12-23 00:17:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:17:14,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-23 00:17:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:14,898 INFO L225 Difference]: With dead ends: 28 [2020-12-23 00:17:14,898 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 00:17:14,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:17:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 00:17:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 00:17:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 00:17:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-12-23 00:17:14,903 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 14 [2020-12-23 00:17:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:14,904 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-12-23 00:17:14,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:17:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2020-12-23 00:17:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:17:14,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:14,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:15,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:15,119 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1180398659, now seen corresponding path program 1 times [2020-12-23 00:17:15,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:15,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026386062] [2020-12-23 00:17:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:15,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026386062] [2020-12-23 00:17:15,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204166749] [2020-12-23 00:17:15,220 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 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 [2020-12-23 00:17:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:15,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:17:15,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:15,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:15,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:17:15,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61015045] [2020-12-23 00:17:15,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:17:15,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:15,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:17:15,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:17:15,347 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 5 states. [2020-12-23 00:17:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:15,391 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2020-12-23 00:17:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:17:15,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 00:17:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:15,392 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:17:15,392 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 00:17:15,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:17:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 00:17:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2020-12-23 00:17:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:17:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-12-23 00:17:15,401 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 14 [2020-12-23 00:17:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:15,402 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-12-23 00:17:15,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:17:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-12-23 00:17:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:17:15,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:15,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:15,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:15,620 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash -795862731, now seen corresponding path program 2 times [2020-12-23 00:17:15,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:15,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826806584] [2020-12-23 00:17:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:15,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826806584] [2020-12-23 00:17:15,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180249000] [2020-12-23 00:17:15,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:15,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:15,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:15,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:17:15,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:15,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:15,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:17:15,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780958697] [2020-12-23 00:17:15,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:17:15,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:15,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:17:15,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:17:15,866 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 6 states. [2020-12-23 00:17:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:15,915 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2020-12-23 00:17:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:17:15,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-23 00:17:15,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:15,917 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:17:15,917 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 00:17:15,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:17:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 00:17:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2020-12-23 00:17:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:17:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2020-12-23 00:17:15,925 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 19 [2020-12-23 00:17:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:15,926 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2020-12-23 00:17:15,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:17:15,926 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2020-12-23 00:17:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 00:17:15,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:15,927 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:16,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:16,132 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:16,133 INFO L82 PathProgramCache]: Analyzing trace with hash -23676029, now seen corresponding path program 3 times [2020-12-23 00:17:16,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:16,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441086565] [2020-12-23 00:17:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:16,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441086565] [2020-12-23 00:17:16,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347935062] [2020-12-23 00:17:16,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:16,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:17:16,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:16,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:17:16,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:16,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:16,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:17:16,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993110291] [2020-12-23 00:17:16,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:17:16,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:16,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:17:16,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:17:16,362 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 7 states. [2020-12-23 00:17:16,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:16,423 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2020-12-23 00:17:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:17:16,426 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-23 00:17:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:16,427 INFO L225 Difference]: With dead ends: 93 [2020-12-23 00:17:16,427 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 00:17:16,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:17:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 00:17:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 41. [2020-12-23 00:17:16,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 00:17:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2020-12-23 00:17:16,435 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 24 [2020-12-23 00:17:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:16,435 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2020-12-23 00:17:16,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:17:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2020-12-23 00:17:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:17:16,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:16,437 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:16,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:16,652 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1702929931, now seen corresponding path program 4 times [2020-12-23 00:17:16,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:16,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303928488] [2020-12-23 00:17:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:16,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303928488] [2020-12-23 00:17:16,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744800652] [2020-12-23 00:17:16,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:16,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:16,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:17:16,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:16,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:16,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:17:16,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008812753] [2020-12-23 00:17:16,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:17:16,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:16,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:17:16,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:17:16,957 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand 8 states. [2020-12-23 00:17:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:17,019 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2020-12-23 00:17:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:17:17,020 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-12-23 00:17:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:17,021 INFO L225 Difference]: With dead ends: 109 [2020-12-23 00:17:17,021 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 00:17:17,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:17:17,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 00:17:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 48. [2020-12-23 00:17:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:17:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2020-12-23 00:17:17,029 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 29 [2020-12-23 00:17:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:17,029 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2020-12-23 00:17:17,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:17:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2020-12-23 00:17:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 00:17:17,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:17,031 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:17,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:17,247 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1882066237, now seen corresponding path program 5 times [2020-12-23 00:17:17,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:17,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829161117] [2020-12-23 00:17:17,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:17,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829161117] [2020-12-23 00:17:17,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999404017] [2020-12-23 00:17:17,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:17,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:17:17,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:17,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:17:17,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:17,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:17,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:17:17,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892017017] [2020-12-23 00:17:17,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:17:17,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:17,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:17:17,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:17,640 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand 9 states. [2020-12-23 00:17:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:17,749 INFO L93 Difference]: Finished difference Result 125 states and 164 transitions. [2020-12-23 00:17:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:17:17,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-12-23 00:17:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:17,751 INFO L225 Difference]: With dead ends: 125 [2020-12-23 00:17:17,751 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 00:17:17,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 00:17:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 55. [2020-12-23 00:17:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 00:17:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2020-12-23 00:17:17,760 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 34 [2020-12-23 00:17:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:17,760 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2020-12-23 00:17:17,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:17:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2020-12-23 00:17:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:17:17,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:17,762 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:17,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:17,976 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:17,976 INFO L82 PathProgramCache]: Analyzing trace with hash -572216651, now seen corresponding path program 6 times [2020-12-23 00:17:17,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:17,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471242902] [2020-12-23 00:17:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:18,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471242902] [2020-12-23 00:17:18,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194759326] [2020-12-23 00:17:18,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:18,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:17:18,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:18,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:17:18,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:18,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:18,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:17:18,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276216228] [2020-12-23 00:17:18,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:17:18,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:18,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:17:18,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:17:18,538 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand 10 states. [2020-12-23 00:17:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:18,626 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2020-12-23 00:17:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:17:18,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-12-23 00:17:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:18,628 INFO L225 Difference]: With dead ends: 141 [2020-12-23 00:17:18,628 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 00:17:18,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:17:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 00:17:18,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 62. [2020-12-23 00:17:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 00:17:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-12-23 00:17:18,636 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 39 [2020-12-23 00:17:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:18,636 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-12-23 00:17:18,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:17:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-12-23 00:17:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 00:17:18,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:18,638 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:18,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:17:18,854 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:18,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:18,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1860246019, now seen corresponding path program 7 times [2020-12-23 00:17:18,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:18,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124257011] [2020-12-23 00:17:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:18,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124257011] [2020-12-23 00:17:18,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009598146] [2020-12-23 00:17:18,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:17:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:19,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:19,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:17:19,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997399110] [2020-12-23 00:17:19,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:17:19,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:19,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:17:19,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:17:19,123 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 11 states. [2020-12-23 00:17:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:19,221 INFO L93 Difference]: Finished difference Result 157 states and 206 transitions. [2020-12-23 00:17:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:17:19,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-12-23 00:17:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:19,223 INFO L225 Difference]: With dead ends: 157 [2020-12-23 00:17:19,224 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 00:17:19,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:17:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 00:17:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 69. [2020-12-23 00:17:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 00:17:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 96 transitions. [2020-12-23 00:17:19,231 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 96 transitions. Word has length 44 [2020-12-23 00:17:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:19,231 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 96 transitions. [2020-12-23 00:17:19,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:17:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 96 transitions. [2020-12-23 00:17:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:17:19,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:19,233 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:19,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:17:19,448 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:19,448 INFO L82 PathProgramCache]: Analyzing trace with hash 174852981, now seen corresponding path program 8 times [2020-12-23 00:17:19,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:19,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791817044] [2020-12-23 00:17:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:19,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791817044] [2020-12-23 00:17:19,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945009274] [2020-12-23 00:17:19,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:19,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:19,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:19,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:17:19,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:19,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:19,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:17:19,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653974171] [2020-12-23 00:17:19,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:17:19,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:19,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:17:19,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:17:19,843 INFO L87 Difference]: Start difference. First operand 69 states and 96 transitions. Second operand 12 states. [2020-12-23 00:17:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:19,967 INFO L93 Difference]: Finished difference Result 173 states and 227 transitions. [2020-12-23 00:17:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:17:19,968 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-12-23 00:17:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:19,969 INFO L225 Difference]: With dead ends: 173 [2020-12-23 00:17:19,970 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 00:17:19,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:17:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 00:17:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 76. [2020-12-23 00:17:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:17:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-12-23 00:17:19,983 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 49 [2020-12-23 00:17:19,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:19,984 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-12-23 00:17:19,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:17:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-12-23 00:17:19,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 00:17:19,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:19,985 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:20,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:20,199 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:20,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash 395850051, now seen corresponding path program 9 times [2020-12-23 00:17:20,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:20,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14921402] [2020-12-23 00:17:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:20,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14921402] [2020-12-23 00:17:20,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143349683] [2020-12-23 00:17:20,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 00:17:21,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:17:21,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:21,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:17:21,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:21,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:21,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:17:21,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344260063] [2020-12-23 00:17:21,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:17:21,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:21,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:17:21,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:17:21,271 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 13 states. [2020-12-23 00:17:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:21,398 INFO L93 Difference]: Finished difference Result 189 states and 248 transitions. [2020-12-23 00:17:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:17:21,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-12-23 00:17:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:21,400 INFO L225 Difference]: With dead ends: 189 [2020-12-23 00:17:21,400 INFO L226 Difference]: Without dead ends: 179 [2020-12-23 00:17:21,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:17:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-23 00:17:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 83. [2020-12-23 00:17:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:17:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2020-12-23 00:17:21,408 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 54 [2020-12-23 00:17:21,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:21,408 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2020-12-23 00:17:21,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:17:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2020-12-23 00:17:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:17:21,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:21,410 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:21,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:21,626 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:21,628 INFO L82 PathProgramCache]: Analyzing trace with hash -389972939, now seen corresponding path program 10 times [2020-12-23 00:17:21,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:21,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161186119] [2020-12-23 00:17:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:21,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161186119] [2020-12-23 00:17:21,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243254954] [2020-12-23 00:17:21,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:22,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:22,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:22,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:17:22,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:22,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:22,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:17:22,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201538924] [2020-12-23 00:17:22,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:17:22,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:22,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:17:22,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:17:22,319 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand 14 states. [2020-12-23 00:17:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:22,446 INFO L93 Difference]: Finished difference Result 205 states and 269 transitions. [2020-12-23 00:17:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:17:22,446 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-12-23 00:17:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:22,448 INFO L225 Difference]: With dead ends: 205 [2020-12-23 00:17:22,448 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 00:17:22,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:17:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 00:17:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 90. [2020-12-23 00:17:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:17:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-12-23 00:17:22,454 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-12-23 00:17:22,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:22,455 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-12-23 00:17:22,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:17:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-12-23 00:17:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 00:17:22,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:22,456 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:22,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:17:22,672 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:22,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1288386691, now seen corresponding path program 11 times [2020-12-23 00:17:22,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:22,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994393905] [2020-12-23 00:17:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:22,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994393905] [2020-12-23 00:17:22,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070976172] [2020-12-23 00:17:22,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:23,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 00:17:23,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:17:23,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:23,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:23,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:17:23,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873768029] [2020-12-23 00:17:23,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:17:23,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:23,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:17:23,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:17:23,508 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 15 states. [2020-12-23 00:17:23,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:23,644 INFO L93 Difference]: Finished difference Result 221 states and 290 transitions. [2020-12-23 00:17:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:17:23,645 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-23 00:17:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:23,646 INFO L225 Difference]: With dead ends: 221 [2020-12-23 00:17:23,647 INFO L226 Difference]: Without dead ends: 211 [2020-12-23 00:17:23,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:17:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-23 00:17:23,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 97. [2020-12-23 00:17:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 00:17:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2020-12-23 00:17:23,660 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 64 [2020-12-23 00:17:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:23,662 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2020-12-23 00:17:23,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:17:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2020-12-23 00:17:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:17:23,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:23,665 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:23,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:17:23,880 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:23,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1519451381, now seen corresponding path program 12 times [2020-12-23 00:17:23,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:23,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580255400] [2020-12-23 00:17:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:24,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580255400] [2020-12-23 00:17:24,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743732986] [2020-12-23 00:17:24,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:27,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:17:27,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:27,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:17:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:27,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:27,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:17:27,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312409970] [2020-12-23 00:17:27,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:17:27,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:27,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:17:27,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:17:27,949 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 16 states. [2020-12-23 00:17:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:28,097 INFO L93 Difference]: Finished difference Result 237 states and 311 transitions. [2020-12-23 00:17:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:17:28,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-12-23 00:17:28,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:28,099 INFO L225 Difference]: With dead ends: 237 [2020-12-23 00:17:28,099 INFO L226 Difference]: Without dead ends: 227 [2020-12-23 00:17:28,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:17:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-23 00:17:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 104. [2020-12-23 00:17:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:17:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 146 transitions. [2020-12-23 00:17:28,105 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 146 transitions. Word has length 69 [2020-12-23 00:17:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:28,105 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 146 transitions. [2020-12-23 00:17:28,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:17:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 146 transitions. [2020-12-23 00:17:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 00:17:28,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:28,106 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:28,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:17:28,307 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:28,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:28,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1481519043, now seen corresponding path program 13 times [2020-12-23 00:17:28,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:28,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108571402] [2020-12-23 00:17:28,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:28,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108571402] [2020-12-23 00:17:28,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833475079] [2020-12-23 00:17:28,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:28,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:17:28,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:28,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:28,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:17:28,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3872101] [2020-12-23 00:17:28,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:17:28,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:28,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:17:28,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:17:28,725 INFO L87 Difference]: Start difference. First operand 104 states and 146 transitions. Second operand 17 states. [2020-12-23 00:17:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:28,903 INFO L93 Difference]: Finished difference Result 253 states and 332 transitions. [2020-12-23 00:17:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:17:28,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2020-12-23 00:17:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:28,907 INFO L225 Difference]: With dead ends: 253 [2020-12-23 00:17:28,907 INFO L226 Difference]: Without dead ends: 243 [2020-12-23 00:17:28,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:17:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-23 00:17:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 111. [2020-12-23 00:17:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 00:17:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2020-12-23 00:17:28,921 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 74 [2020-12-23 00:17:28,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:28,922 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2020-12-23 00:17:28,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:17:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2020-12-23 00:17:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:17:28,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:28,929 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:29,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:29,145 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:29,146 INFO L82 PathProgramCache]: Analyzing trace with hash 445025717, now seen corresponding path program 14 times [2020-12-23 00:17:29,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:29,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092061240] [2020-12-23 00:17:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:29,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092061240] [2020-12-23 00:17:29,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610613307] [2020-12-23 00:17:29,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:29,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:29,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:17:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:29,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:29,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:17:29,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014684334] [2020-12-23 00:17:29,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:17:29,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:29,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:17:29,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:17:29,587 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand 18 states. [2020-12-23 00:17:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:29,766 INFO L93 Difference]: Finished difference Result 269 states and 353 transitions. [2020-12-23 00:17:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:17:29,767 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-12-23 00:17:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:29,769 INFO L225 Difference]: With dead ends: 269 [2020-12-23 00:17:29,769 INFO L226 Difference]: Without dead ends: 259 [2020-12-23 00:17:29,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:17:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-23 00:17:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 118. [2020-12-23 00:17:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 00:17:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2020-12-23 00:17:29,775 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 79 [2020-12-23 00:17:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:29,776 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2020-12-23 00:17:29,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:17:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2020-12-23 00:17:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 00:17:29,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:29,778 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:29,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:17:29,992 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:29,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1257576195, now seen corresponding path program 15 times [2020-12-23 00:17:29,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:29,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615074535] [2020-12-23 00:17:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:30,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615074535] [2020-12-23 00:17:30,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135950109] [2020-12-23 00:17:30,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:51,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 00:17:51,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:51,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:17:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:51,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:51,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:17:51,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587609961] [2020-12-23 00:17:51,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:17:51,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:51,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:17:51,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:17:51,417 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand 19 states. [2020-12-23 00:17:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:51,602 INFO L93 Difference]: Finished difference Result 285 states and 374 transitions. [2020-12-23 00:17:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:17:51,602 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2020-12-23 00:17:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:51,604 INFO L225 Difference]: With dead ends: 285 [2020-12-23 00:17:51,604 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 00:17:51,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:17:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 00:17:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 125. [2020-12-23 00:17:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 00:17:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 176 transitions. [2020-12-23 00:17:51,611 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 176 transitions. Word has length 84 [2020-12-23 00:17:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:51,611 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 176 transitions. [2020-12-23 00:17:51,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:17:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 176 transitions. [2020-12-23 00:17:51,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:17:51,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:51,612 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:51,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:51,820 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:51,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2085498485, now seen corresponding path program 16 times [2020-12-23 00:17:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:51,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184578479] [2020-12-23 00:17:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:52,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184578479] [2020-12-23 00:17:52,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520008109] [2020-12-23 00:17:52,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:52,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:52,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:17:52,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:52,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:52,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:17:52,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981818424] [2020-12-23 00:17:52,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:17:52,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:52,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:17:52,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:17:52,948 INFO L87 Difference]: Start difference. First operand 125 states and 176 transitions. Second operand 20 states. [2020-12-23 00:17:53,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:53,159 INFO L93 Difference]: Finished difference Result 301 states and 395 transitions. [2020-12-23 00:17:53,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:17:53,160 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-12-23 00:17:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:53,162 INFO L225 Difference]: With dead ends: 301 [2020-12-23 00:17:53,162 INFO L226 Difference]: Without dead ends: 291 [2020-12-23 00:17:53,163 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 [2020-12-23 00:17:53,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-23 00:17:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 132. [2020-12-23 00:17:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 00:17:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 186 transitions. [2020-12-23 00:17:53,169 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 186 transitions. Word has length 89 [2020-12-23 00:17:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:53,169 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 186 transitions. [2020-12-23 00:17:53,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:17:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 186 transitions. [2020-12-23 00:17:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 00:17:53,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:53,171 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:53,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:53,385 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:53,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1016327747, now seen corresponding path program 17 times [2020-12-23 00:17:53,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:53,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852766893] [2020-12-23 00:17:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:53,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852766893] [2020-12-23 00:17:53,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100849550] [2020-12-23 00:17:53,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:41,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 00:18:41,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:18:41,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:41,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:41,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 00:18:41,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964693291] [2020-12-23 00:18:41,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:18:41,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:41,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:18:41,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:18:41,431 INFO L87 Difference]: Start difference. First operand 132 states and 186 transitions. Second operand 21 states. [2020-12-23 00:18:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:41,665 INFO L93 Difference]: Finished difference Result 317 states and 416 transitions. [2020-12-23 00:18:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:18:41,666 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2020-12-23 00:18:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:41,668 INFO L225 Difference]: With dead ends: 317 [2020-12-23 00:18:41,668 INFO L226 Difference]: Without dead ends: 307 [2020-12-23 00:18:41,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:18:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-23 00:18:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 139. [2020-12-23 00:18:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 00:18:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 196 transitions. [2020-12-23 00:18:41,674 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 196 transitions. Word has length 94 [2020-12-23 00:18:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:41,675 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 196 transitions. [2020-12-23 00:18:41,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:18:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 196 transitions. [2020-12-23 00:18:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 00:18:41,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:41,676 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:41,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:18:41,877 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:41,878 INFO L82 PathProgramCache]: Analyzing trace with hash 747888437, now seen corresponding path program 18 times [2020-12-23 00:18:41,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:41,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049186328] [2020-12-23 00:18:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:42,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049186328] [2020-12-23 00:18:42,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204052001] [2020-12-23 00:18:42,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true