/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-programs/copysome2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:28:20,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:28:20,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:28:20,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:28:20,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:28:20,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:28:20,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:28:20,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:28:20,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:28:20,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:28:20,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:28:20,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:28:20,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:28:20,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:28:20,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:28:20,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:28:20,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:28:20,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:28:20,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:28:20,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:28:20,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:28:20,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:28:20,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:28:20,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:28:20,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:28:20,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:28:20,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:28:20,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:28:20,321 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:28:20,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:28:20,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:28:20,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:28:20,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:28:20,394 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:28:20,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:28:20,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:28:20,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:28:20,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:28:20,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:28:20,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:28:20,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:28:20,397 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:28:20,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:28:20,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:28:20,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:28:20,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:28:20,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:28:20,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:28:20,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:28:20,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:28:20,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:28:20,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:28:20,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:28:20,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:28:20,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:28:20,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:28:20,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:28:20,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:28:20,967 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:28:20,968 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:28:20,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/copysome2-1.i [2021-01-06 10:28:21,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eee09b963/b6e6c39bd14046c1ad3685f786bf40ce/FLAGa5bb3656b [2021-01-06 10:28:21,897 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:28:21,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/copysome2-1.i [2021-01-06 10:28:21,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eee09b963/b6e6c39bd14046c1ad3685f786bf40ce/FLAGa5bb3656b [2021-01-06 10:28:22,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eee09b963/b6e6c39bd14046c1ad3685f786bf40ce [2021-01-06 10:28:22,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:28:22,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:28:22,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:22,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:28:22,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:28:22,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:22" (1/1) ... [2021-01-06 10:28:22,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ca1c99a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22, skipping insertion in model container [2021-01-06 10:28:22,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:22" (1/1) ... [2021-01-06 10:28:22,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:28:22,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:28:22,432 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-programs/copysome2-1.i[804,817] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 10:28:22,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:22,470 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:28:22,487 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-programs/copysome2-1.i[804,817] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 10:28:22,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:22,521 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:28:22,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22 WrapperNode [2021-01-06 10:28:22,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:22,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:22,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:28:22,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:28:22,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22" (1/1) ... [2021-01-06 10:28:22,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22" (1/1) ... [2021-01-06 10:28:22,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:22,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:28:22,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:28:22,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:28:22,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22" (1/1) ... [2021-01-06 10:28:22,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22" (1/1) ... [2021-01-06 10:28:22,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22" (1/1) ... [2021-01-06 10:28:22,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22" (1/1) ... [2021-01-06 10:28:22,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22" (1/1) ... [2021-01-06 10:28:22,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22" (1/1) ... [2021-01-06 10:28:22,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22" (1/1) ... [2021-01-06 10:28:22,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:28:22,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:28:22,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:28:22,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:28:22,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:28:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:28:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:28:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:28:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:28:22,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:28:22,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:28:22,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:28:23,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:28:23,136 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 10:28:23,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:23 BoogieIcfgContainer [2021-01-06 10:28:23,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:28:23,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:28:23,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:28:23,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:28:23,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:28:22" (1/3) ... [2021-01-06 10:28:23,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e395a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:23, skipping insertion in model container [2021-01-06 10:28:23,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:22" (2/3) ... [2021-01-06 10:28:23,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e395a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:23, skipping insertion in model container [2021-01-06 10:28:23,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:23" (3/3) ... [2021-01-06 10:28:23,169 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2021-01-06 10:28:23,192 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:28:23,209 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:28:23,271 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:28:23,313 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:28:23,313 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:28:23,313 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:28:23,313 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:28:23,313 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:28:23,314 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:28:23,314 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:28:23,314 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:28:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 10:28:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:28:23,343 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:23,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:23,344 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:23,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:23,353 INFO L82 PathProgramCache]: Analyzing trace with hash 551047633, now seen corresponding path program 1 times [2021-01-06 10:28:23,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:23,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169506527] [2021-01-06 10:28:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:23,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169506527] [2021-01-06 10:28:23,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:23,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:28:23,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189948294] [2021-01-06 10:28:23,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:28:23,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:23,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:28:23,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:28:23,607 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-01-06 10:28:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:23,633 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-01-06 10:28:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:28:23,635 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:28:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:23,649 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:28:23,649 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 10:28:23,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:28:23,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 10:28:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 10:28:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:28:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-01-06 10:28:23,705 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2021-01-06 10:28:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:23,706 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-01-06 10:28:23,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:28:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-01-06 10:28:23,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:28:23,708 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:23,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:23,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:28:23,709 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:23,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:23,710 INFO L82 PathProgramCache]: Analyzing trace with hash -631716997, now seen corresponding path program 1 times [2021-01-06 10:28:23,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:23,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596395002] [2021-01-06 10:28:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:23,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596395002] [2021-01-06 10:28:23,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:23,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:28:23,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936527049] [2021-01-06 10:28:23,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:28:23,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:23,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:28:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:28:23,824 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2021-01-06 10:28:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:23,912 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-01-06 10:28:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:28:23,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 10:28:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:23,913 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:28:23,914 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:28:23,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:28:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:28:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-01-06 10:28:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 10:28:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-01-06 10:28:23,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2021-01-06 10:28:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:23,923 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-01-06 10:28:23,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:28:23,923 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-01-06 10:28:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:28:23,924 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:23,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:23,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:28:23,925 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:23,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1141073570, now seen corresponding path program 1 times [2021-01-06 10:28:23,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:23,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362934884] [2021-01-06 10:28:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:28:23,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362934884] [2021-01-06 10:28:23,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864114631] [2021-01-06 10:28:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:24,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:28:24,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:28:24,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:24,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:28:24,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766550591] [2021-01-06 10:28:24,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:28:24,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:24,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:28:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:28:24,246 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 5 states. [2021-01-06 10:28:24,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:24,343 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2021-01-06 10:28:24,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:28:24,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2021-01-06 10:28:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:24,346 INFO L225 Difference]: With dead ends: 52 [2021-01-06 10:28:24,346 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 10:28:24,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:28:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 10:28:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-01-06 10:28:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:28:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-01-06 10:28:24,354 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2021-01-06 10:28:24,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:24,355 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-01-06 10:28:24,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:28:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-01-06 10:28:24,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:28:24,356 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:24,356 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:24,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:28:24,573 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:24,574 INFO L82 PathProgramCache]: Analyzing trace with hash -890123177, now seen corresponding path program 2 times [2021-01-06 10:28:24,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:24,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900813337] [2021-01-06 10:28:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 10:28:24,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900813337] [2021-01-06 10:28:24,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:24,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:28:24,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091478955] [2021-01-06 10:28:24,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:28:24,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:24,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:28:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:28:24,789 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2021-01-06 10:28:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:24,869 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-01-06 10:28:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:28:24,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-01-06 10:28:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:24,873 INFO L225 Difference]: With dead ends: 50 [2021-01-06 10:28:24,873 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:28:24,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:28:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:28:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 10:28:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:28:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-01-06 10:28:24,889 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 27 [2021-01-06 10:28:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:24,890 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-01-06 10:28:24,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:28:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-01-06 10:28:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:28:24,891 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:24,892 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:24,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 10:28:24,892 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:24,898 INFO L82 PathProgramCache]: Analyzing trace with hash -497096167, now seen corresponding path program 1 times [2021-01-06 10:28:24,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:24,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405143772] [2021-01-06 10:28:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:28:25,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405143772] [2021-01-06 10:28:25,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719644541] [2021-01-06 10:28:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:25,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:28:25,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:28:25,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:25,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 10:28:25,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575390025] [2021-01-06 10:28:25,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:28:25,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:25,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:28:25,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:28:25,248 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 8 states. [2021-01-06 10:28:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:25,379 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2021-01-06 10:28:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:28:25,379 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2021-01-06 10:28:25,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:25,380 INFO L225 Difference]: With dead ends: 66 [2021-01-06 10:28:25,381 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 10:28:25,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 10:28:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-01-06 10:28:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 10:28:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-01-06 10:28:25,389 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 27 [2021-01-06 10:28:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:25,389 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-01-06 10:28:25,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:28:25,390 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-01-06 10:28:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:28:25,391 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:25,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:25,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:25,605 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:25,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:25,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1104364036, now seen corresponding path program 1 times [2021-01-06 10:28:25,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:25,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292066873] [2021-01-06 10:28:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 10:28:25,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292066873] [2021-01-06 10:28:25,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269008843] [2021-01-06 10:28:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:25,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:28:25,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 10:28:25,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:25,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:28:25,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930926493] [2021-01-06 10:28:25,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:28:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:28:25,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:25,804 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2021-01-06 10:28:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:25,923 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2021-01-06 10:28:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:28:25,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 10:28:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:25,925 INFO L225 Difference]: With dead ends: 82 [2021-01-06 10:28:25,925 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:28:25,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:28:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-01-06 10:28:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:28:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-01-06 10:28:25,933 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 35 [2021-01-06 10:28:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:25,933 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-01-06 10:28:25,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:28:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-01-06 10:28:25,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 10:28:25,935 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:25,935 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:26,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:26,150 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:26,152 INFO L82 PathProgramCache]: Analyzing trace with hash 989483061, now seen corresponding path program 2 times [2021-01-06 10:28:26,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:26,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555797748] [2021-01-06 10:28:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-01-06 10:28:26,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555797748] [2021-01-06 10:28:26,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149556749] [2021-01-06 10:28:26,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:26,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:26,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:26,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:28:26,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-01-06 10:28:26,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:26,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2021-01-06 10:28:26,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864996107] [2021-01-06 10:28:26,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:28:26,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:26,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:28:26,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:26,481 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2021-01-06 10:28:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:26,750 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2021-01-06 10:28:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:28:26,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2021-01-06 10:28:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:26,754 INFO L225 Difference]: With dead ends: 110 [2021-01-06 10:28:26,754 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:28:26,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:28:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:28:26,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-01-06 10:28:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:28:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2021-01-06 10:28:26,767 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 43 [2021-01-06 10:28:26,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:26,767 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2021-01-06 10:28:26,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:28:26,768 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2021-01-06 10:28:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 10:28:26,770 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:26,771 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:26,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:26,985 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash -699697486, now seen corresponding path program 3 times [2021-01-06 10:28:26,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:26,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494273396] [2021-01-06 10:28:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-01-06 10:28:27,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494273396] [2021-01-06 10:28:27,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13412003] [2021-01-06 10:28:27,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:27,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:28:27,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:28:27,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-01-06 10:28:27,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:27,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-01-06 10:28:27,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115265569] [2021-01-06 10:28:27,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:28:27,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:28:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:28:27,586 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 16 states. [2021-01-06 10:28:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:28,131 INFO L93 Difference]: Finished difference Result 175 states and 221 transitions. [2021-01-06 10:28:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:28:28,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2021-01-06 10:28:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:28,133 INFO L225 Difference]: With dead ends: 175 [2021-01-06 10:28:28,134 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 10:28:28,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:28:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 10:28:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-01-06 10:28:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 10:28:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2021-01-06 10:28:28,151 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 67 [2021-01-06 10:28:28,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:28,152 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2021-01-06 10:28:28,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:28:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2021-01-06 10:28:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 10:28:28,155 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:28,156 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:28,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:28,372 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash -144131101, now seen corresponding path program 4 times [2021-01-06 10:28:28,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:28,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028388207] [2021-01-06 10:28:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-01-06 10:28:28,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028388207] [2021-01-06 10:28:28,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470042074] [2021-01-06 10:28:28,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:28,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:28,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:28,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:28:28,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-01-06 10:28:28,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:28,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2021-01-06 10:28:28,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193375959] [2021-01-06 10:28:28,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:28:28,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:28,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:28:28,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:28:28,886 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand 4 states. [2021-01-06 10:28:28,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:28,941 INFO L93 Difference]: Finished difference Result 248 states and 305 transitions. [2021-01-06 10:28:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:28:28,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2021-01-06 10:28:28,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:28,943 INFO L225 Difference]: With dead ends: 248 [2021-01-06 10:28:28,944 INFO L226 Difference]: Without dead ends: 180 [2021-01-06 10:28:28,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:28:28,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-01-06 10:28:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 162. [2021-01-06 10:28:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 10:28:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2021-01-06 10:28:28,964 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 107 [2021-01-06 10:28:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:28,964 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2021-01-06 10:28:28,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:28:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2021-01-06 10:28:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 10:28:28,972 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:28,973 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:29,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:29,185 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:29,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:29,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1579016539, now seen corresponding path program 5 times [2021-01-06 10:28:29,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:29,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682754440] [2021-01-06 10:28:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-01-06 10:28:29,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682754440] [2021-01-06 10:28:29,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982278779] [2021-01-06 10:28:29,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true