/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:48:25,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:48:25,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:48:25,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:48:25,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:48:25,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:48:25,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:48:25,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:48:25,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:48:25,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:48:25,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:48:25,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:48:25,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:48:25,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:48:25,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:48:25,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:48:25,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:48:25,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:48:25,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:48:25,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:48:25,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:48:25,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:48:25,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:48:25,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:48:25,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:48:25,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:48:25,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:48:25,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:48:25,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:48:25,330 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:48:25,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:48:25,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:48:25,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:48:25,332 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:48:25,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:48:25,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:48:25,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:48:25,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:48:25,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:48:25,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:48:25,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:48:25,335 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:48:25,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:48:25,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:48:25,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:48:25,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:48:25,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:48:25,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:48:25,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:48:25,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:48:25,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:48:25,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:48:25,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:48:25,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:48:25,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:48:25,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:48:25,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:48:25,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:48:25,881 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:48:25,883 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:48:25,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2020-12-22 23:48:25,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0eb91149a/95536dbd6d194d38b9911be947460aec/FLAGf9246f58b [2020-12-22 23:48:26,583 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:48:26,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2020-12-22 23:48:26,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0eb91149a/95536dbd6d194d38b9911be947460aec/FLAGf9246f58b [2020-12-22 23:48:26,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0eb91149a/95536dbd6d194d38b9911be947460aec [2020-12-22 23:48:26,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:48:26,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:48:26,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:26,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:48:26,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:48:26,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:26" (1/1) ... [2020-12-22 23:48:26,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d243bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:26, skipping insertion in model container [2020-12-22 23:48:26,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:26" (1/1) ... [2020-12-22 23:48:26,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:48:27,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:48:27,175 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~1,]]] 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: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~s~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-22 23:48:27,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,224 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:48:27,240 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] 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: lhs: VariableLHS[~k~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~s~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-22 23:48:27,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,288 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:48:27,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27 WrapperNode [2020-12-22 23:48:27,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:27,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:48:27,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:48:27,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:48:27,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:48:27,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:48:27,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:48:27,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:48:27,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (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 [2020-12-22 23:48:27,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:48:27,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:48:27,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:48:27,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:48:27,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:48:27,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:48:27,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:48:28,160 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:48:28,160 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-22 23:48:28,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:28 BoogieIcfgContainer [2020-12-22 23:48:28,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:48:28,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:48:28,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:48:28,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:48:28,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:48:26" (1/3) ... [2020-12-22 23:48:28,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba3a615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:28, skipping insertion in model container [2020-12-22 23:48:28,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (2/3) ... [2020-12-22 23:48:28,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba3a615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:28, skipping insertion in model container [2020-12-22 23:48:28,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:28" (3/3) ... [2020-12-22 23:48:28,178 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2020-12-22 23:48:28,186 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:48:28,192 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 23:48:28,217 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 23:48:28,266 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:48:28,266 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:48:28,267 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:48:28,267 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:48:28,267 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:48:28,267 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:48:28,267 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:48:28,267 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:48:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-22 23:48:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 23:48:28,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,298 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,306 INFO L82 PathProgramCache]: Analyzing trace with hash 305970967, now seen corresponding path program 1 times [2020-12-22 23:48:28,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609080828] [2020-12-22 23:48:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:28,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609080828] [2020-12-22 23:48:28,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:28,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 23:48:28,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011091311] [2020-12-22 23:48:28,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 23:48:28,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 23:48:28,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 23:48:28,514 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-12-22 23:48:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,536 INFO L93 Difference]: Finished difference Result 76 states and 114 transitions. [2020-12-22 23:48:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 23:48:28,538 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-22 23:48:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,551 INFO L225 Difference]: With dead ends: 76 [2020-12-22 23:48:28,551 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 23:48:28,558 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 [2020-12-22 23:48:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 23:48:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 23:48:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 23:48:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-22 23:48:28,597 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 10 [2020-12-22 23:48:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,597 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-22 23:48:28,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 23:48:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-22 23:48:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 23:48:28,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:48:28,600 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2024314673, now seen corresponding path program 1 times [2020-12-22 23:48:28,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292275648] [2020-12-22 23:48:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:28,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292275648] [2020-12-22 23:48:28,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:28,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:48:28,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346846718] [2020-12-22 23:48:28,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:28,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:28,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:28,709 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2020-12-22 23:48:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,735 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-12-22 23:48:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:28,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 23:48:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,737 INFO L225 Difference]: With dead ends: 70 [2020-12-22 23:48:28,737 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 23:48:28,738 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 [2020-12-22 23:48:28,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 23:48:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-22 23:48:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 23:48:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-12-22 23:48:28,747 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 10 [2020-12-22 23:48:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,747 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-12-22 23:48:28,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-12-22 23:48:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 23:48:28,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 23:48:28,749 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1369117107, now seen corresponding path program 1 times [2020-12-22 23:48:28,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183652437] [2020-12-22 23:48:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183652437] [2020-12-22 23:48:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413109695] [2020-12-22 23:48:28,801 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 [2020-12-22 23:48:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:48:28,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:28,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:28,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:48:28,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956995195] [2020-12-22 23:48:28,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:28,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:28,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:28,903 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 3 states. [2020-12-22 23:48:28,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,951 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-12-22 23:48:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:28,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 23:48:28,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,953 INFO L225 Difference]: With dead ends: 68 [2020-12-22 23:48:28,953 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 23:48:28,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:28,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 23:48:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2020-12-22 23:48:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 23:48:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-22 23:48:28,962 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 12 [2020-12-22 23:48:28,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,962 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-22 23:48:28,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-22 23:48:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 23:48:28,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 23:48:29,178 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2104069184, now seen corresponding path program 1 times [2020-12-22 23:48:29,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221806048] [2020-12-22 23:48:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:29,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221806048] [2020-12-22 23:48:29,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287989405] [2020-12-22 23:48:29,230 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 [2020-12-22 23:48:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:48:29,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:29,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:29,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:48:29,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781947651] [2020-12-22 23:48:29,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:29,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:29,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:29,358 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 5 states. [2020-12-22 23:48:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,380 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-12-22 23:48:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:29,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-22 23:48:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,381 INFO L225 Difference]: With dead ends: 74 [2020-12-22 23:48:29,382 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 23:48:29,382 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 [2020-12-22 23:48:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 23:48:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-22 23:48:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 23:48:29,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-12-22 23:48:29,390 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 14 [2020-12-22 23:48:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,390 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-12-22 23:48:29,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-12-22 23:48:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 23:48:29,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,391 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:29,607 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1270281666, now seen corresponding path program 2 times [2020-12-22 23:48:29,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024406872] [2020-12-22 23:48:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:48:29,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024406872] [2020-12-22 23:48:29,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:29,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 23:48:29,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245960859] [2020-12-22 23:48:29,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:29,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:29,697 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 4 states. [2020-12-22 23:48:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,809 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-12-22 23:48:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:29,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-22 23:48:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,814 INFO L225 Difference]: With dead ends: 95 [2020-12-22 23:48:29,814 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 23:48:29,815 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 [2020-12-22 23:48:29,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 23:48:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2020-12-22 23:48:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 23:48:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-12-22 23:48:29,830 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 16 [2020-12-22 23:48:29,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,832 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-12-22 23:48:29,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-12-22 23:48:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 23:48:29,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,834 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 23:48:29,834 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash 851634768, now seen corresponding path program 1 times [2020-12-22 23:48:29,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274099434] [2020-12-22 23:48:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:48:29,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274099434] [2020-12-22 23:48:29,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:29,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 23:48:29,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983173136] [2020-12-22 23:48:29,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:29,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:29,930 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 4 states. [2020-12-22 23:48:30,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,002 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2020-12-22 23:48:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:30,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-22 23:48:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,005 INFO L225 Difference]: With dead ends: 92 [2020-12-22 23:48:30,006 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 23:48:30,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 23:48:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-12-22 23:48:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 23:48:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-12-22 23:48:30,014 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 19 [2020-12-22 23:48:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,015 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-12-22 23:48:30,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-12-22 23:48:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 23:48:30,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,016 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 23:48:30,017 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash 629647741, now seen corresponding path program 1 times [2020-12-22 23:48:30,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938891959] [2020-12-22 23:48:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:30,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938891959] [2020-12-22 23:48:30,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43728746] [2020-12-22 23:48:30,119 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 [2020-12-22 23:48:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:48:30,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:30,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:30,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 23:48:30,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563164212] [2020-12-22 23:48:30,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 23:48:30,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 23:48:30,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:48:30,239 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 6 states. [2020-12-22 23:48:30,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,267 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2020-12-22 23:48:30,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 23:48:30,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-22 23:48:30,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,268 INFO L225 Difference]: With dead ends: 94 [2020-12-22 23:48:30,269 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 23:48:30,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:48:30,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 23:48:30,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-22 23:48:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 23:48:30,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-12-22 23:48:30,297 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2020-12-22 23:48:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,298 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-12-22 23:48:30,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 23:48:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-12-22 23:48:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 23:48:30,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,299 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:30,514 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1857263233, now seen corresponding path program 2 times [2020-12-22 23:48:30,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771002931] [2020-12-22 23:48:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:30,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771002931] [2020-12-22 23:48:30,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815733019] [2020-12-22 23:48:30,573 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 [2020-12-22 23:48:30,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 23:48:30,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:30,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:48:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:30,760 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:30,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 23:48:30,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:30,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-12-22 23:48:30,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517552036] [2020-12-22 23:48:30,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 23:48:30,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 23:48:30,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:48:30,792 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 6 states. [2020-12-22 23:48:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,927 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-12-22 23:48:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 23:48:30,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-22 23:48:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,929 INFO L225 Difference]: With dead ends: 81 [2020-12-22 23:48:30,929 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 23:48:30,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:48:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 23:48:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2020-12-22 23:48:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 23:48:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-12-22 23:48:30,950 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 22 [2020-12-22 23:48:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,951 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-12-22 23:48:30,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 23:48:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-12-22 23:48:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 23:48:30,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,954 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:31,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,168 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,169 INFO L82 PathProgramCache]: Analyzing trace with hash -487696587, now seen corresponding path program 1 times [2020-12-22 23:48:31,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374458663] [2020-12-22 23:48:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:31,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374458663] [2020-12-22 23:48:31,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146701026] [2020-12-22 23:48:31,221 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 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 [2020-12-22 23:48:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:31,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:31,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:31,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 23:48:31,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254372608] [2020-12-22 23:48:31,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:48:31,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:48:31,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:31,341 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 7 states. [2020-12-22 23:48:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,366 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2020-12-22 23:48:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:48:31,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-22 23:48:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,368 INFO L225 Difference]: With dead ends: 98 [2020-12-22 23:48:31,371 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 23:48:31,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 23:48:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-22 23:48:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 23:48:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2020-12-22 23:48:31,388 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 26 [2020-12-22 23:48:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,389 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2020-12-22 23:48:31,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:48:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2020-12-22 23:48:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 23:48:31,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,392 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:31,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,606 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2115007049, now seen corresponding path program 2 times [2020-12-22 23:48:31,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317995375] [2020-12-22 23:48:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:31,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317995375] [2020-12-22 23:48:31,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891503406] [2020-12-22 23:48:31,680 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 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 [2020-12-22 23:48:31,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:31,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:31,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:31,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:31,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:31,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 23:48:31,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883599381] [2020-12-22 23:48:31,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:48:31,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:48:31,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:48:31,806 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 8 states. [2020-12-22 23:48:31,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,830 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-12-22 23:48:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:48:31,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-22 23:48:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,831 INFO L225 Difference]: With dead ends: 100 [2020-12-22 23:48:31,831 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 23:48:31,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:48:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 23:48:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-22 23:48:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 23:48:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-12-22 23:48:31,836 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 28 [2020-12-22 23:48:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,836 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-12-22 23:48:31,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:48:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-12-22 23:48:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 23:48:31,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,838 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:32,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:32,053 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1702702009, now seen corresponding path program 3 times [2020-12-22 23:48:32,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:32,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577662322] [2020-12-22 23:48:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:32,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577662322] [2020-12-22 23:48:32,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463915036] [2020-12-22 23:48:32,162 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 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 [2020-12-22 23:48:32,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 23:48:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:32,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:48:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 23:48:32,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:32,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2020-12-22 23:48:32,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200019742] [2020-12-22 23:48:32,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 23:48:32,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:32,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 23:48:32,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:48:32,304 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-12-22 23:48:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:32,472 INFO L93 Difference]: Finished difference Result 132 states and 165 transitions. [2020-12-22 23:48:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:48:32,473 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-12-22 23:48:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:32,474 INFO L225 Difference]: With dead ends: 132 [2020-12-22 23:48:32,474 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 23:48:32,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:32,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 23:48:32,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-12-22 23:48:32,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 23:48:32,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-12-22 23:48:32,480 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 30 [2020-12-22 23:48:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:32,481 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-12-22 23:48:32,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 23:48:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-12-22 23:48:32,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 23:48:32,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:32,482 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:32,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:32,696 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:32,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:32,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1917971385, now seen corresponding path program 1 times [2020-12-22 23:48:32,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:32,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489343932] [2020-12-22 23:48:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:32,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489343932] [2020-12-22 23:48:32,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338603087] [2020-12-22 23:48:32,776 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 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 [2020-12-22 23:48:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:48:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:32,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:32,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 23:48:32,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073339154] [2020-12-22 23:48:32,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 23:48:32,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:32,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 23:48:32,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:48:32,915 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 10 states. [2020-12-22 23:48:32,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:32,949 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2020-12-22 23:48:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:48:32,950 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-22 23:48:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:32,951 INFO L225 Difference]: With dead ends: 120 [2020-12-22 23:48:32,951 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 23:48:32,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:48:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 23:48:32,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-22 23:48:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 23:48:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-12-22 23:48:32,960 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 32 [2020-12-22 23:48:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:32,960 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-12-22 23:48:32,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 23:48:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-12-22 23:48:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 23:48:32,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:32,966 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:33,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:48:33,180 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:33,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2046605499, now seen corresponding path program 2 times [2020-12-22 23:48:33,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:33,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696218419] [2020-12-22 23:48:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:33,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696218419] [2020-12-22 23:48:33,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429874261] [2020-12-22 23:48:33,270 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 [2020-12-22 23:48:33,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:33,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:33,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:33,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:48:33,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749415079] [2020-12-22 23:48:33,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:48:33,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:33,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:48:33,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:33,405 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 11 states. [2020-12-22 23:48:33,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:33,448 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2020-12-22 23:48:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:48:33,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-22 23:48:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:33,449 INFO L225 Difference]: With dead ends: 122 [2020-12-22 23:48:33,450 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 23:48:33,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 23:48:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-22 23:48:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 23:48:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2020-12-22 23:48:33,455 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 34 [2020-12-22 23:48:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:33,456 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2020-12-22 23:48:33,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:48:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2020-12-22 23:48:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 23:48:33,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:33,457 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:33,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:33,672 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:33,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1109937469, now seen corresponding path program 3 times [2020-12-22 23:48:33,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:33,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392861606] [2020-12-22 23:48:33,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:33,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392861606] [2020-12-22 23:48:33,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374504401] [2020-12-22 23:48:33,772 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 [2020-12-22 23:48:33,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 23:48:33,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:33,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:48:33,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 23:48:33,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:33,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2020-12-22 23:48:33,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918028062] [2020-12-22 23:48:33,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:33,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:33,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:33,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:33,903 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand 14 states. [2020-12-22 23:48:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,135 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2020-12-22 23:48:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:48:34,136 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-22 23:48:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,137 INFO L225 Difference]: With dead ends: 140 [2020-12-22 23:48:34,137 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 23:48:34,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:48:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 23:48:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2020-12-22 23:48:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 23:48:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2020-12-22 23:48:34,143 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 36 [2020-12-22 23:48:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,143 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2020-12-22 23:48:34,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2020-12-22 23:48:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 23:48:34,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,144 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:34,359 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,360 INFO L82 PathProgramCache]: Analyzing trace with hash 102207473, now seen corresponding path program 4 times [2020-12-22 23:48:34,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734569684] [2020-12-22 23:48:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:48:34,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734569684] [2020-12-22 23:48:34,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746244320] [2020-12-22 23:48:34,474 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 [2020-12-22 23:48:34,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:34,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:34,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:48:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:48:34,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:34,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 23:48:34,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465591471] [2020-12-22 23:48:34,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:48:34,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:34,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:48:34,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:48:34,617 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 13 states. [2020-12-22 23:48:34,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,668 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2020-12-22 23:48:34,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:48:34,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-12-22 23:48:34,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,669 INFO L225 Difference]: With dead ends: 136 [2020-12-22 23:48:34,669 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 23:48:34,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:48:34,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 23:48:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-22 23:48:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 23:48:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2020-12-22 23:48:34,676 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 41 [2020-12-22 23:48:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,676 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2020-12-22 23:48:34,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:48:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2020-12-22 23:48:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 23:48:34,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,677 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 23:48:34,891 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1244248785, now seen corresponding path program 5 times [2020-12-22 23:48:34,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562639269] [2020-12-22 23:48:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:48:35,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562639269] [2020-12-22 23:48:35,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687107660] [2020-12-22 23:48:35,018 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 [2020-12-22 23:48:35,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-22 23:48:35,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:35,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:48:35,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:48:35,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:35,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 23:48:35,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320389750] [2020-12-22 23:48:35,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:35,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:35,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:35,205 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 14 states. [2020-12-22 23:48:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,248 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2020-12-22 23:48:35,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:48:35,249 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-12-22 23:48:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,250 INFO L225 Difference]: With dead ends: 138 [2020-12-22 23:48:35,250 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 23:48:35,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 23:48:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-22 23:48:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 23:48:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2020-12-22 23:48:35,255 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 43 [2020-12-22 23:48:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:35,255 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2020-12-22 23:48:35,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2020-12-22 23:48:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 23:48:35,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:35,256 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:35,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 23:48:35,471 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:35,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1891410669, now seen corresponding path program 6 times [2020-12-22 23:48:35,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:35,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736296443] [2020-12-22 23:48:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:48:35,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736296443] [2020-12-22 23:48:35,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512808747] [2020-12-22 23:48:35,631 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 [2020-12-22 23:48:35,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 23:48:35,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:35,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:35,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-12-22 23:48:35,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:35,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2020-12-22 23:48:35,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399599559] [2020-12-22 23:48:35,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:48:35,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:48:35,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:35,832 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand 18 states. [2020-12-22 23:48:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,272 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2020-12-22 23:48:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:48:36,273 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-12-22 23:48:36,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,276 INFO L225 Difference]: With dead ends: 157 [2020-12-22 23:48:36,276 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 23:48:36,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:48:36,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 23:48:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2020-12-22 23:48:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 23:48:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-12-22 23:48:36,286 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 45 [2020-12-22 23:48:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,287 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-12-22 23:48:36,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:48:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-12-22 23:48:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 23:48:36,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,288 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:36,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:48:36,502 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1678460795, now seen corresponding path program 7 times [2020-12-22 23:48:36,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166697328] [2020-12-22 23:48:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 23:48:36,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166697328] [2020-12-22 23:48:36,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769417972] [2020-12-22 23:48:36,649 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 [2020-12-22 23:48:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 23:48:36,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:36,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 23:48:36,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213902461] [2020-12-22 23:48:36,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 23:48:36,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:36,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 23:48:36,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:48:36,797 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 16 states. [2020-12-22 23:48:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,876 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2020-12-22 23:48:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 23:48:36,883 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-12-22 23:48:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,884 INFO L225 Difference]: With dead ends: 154 [2020-12-22 23:48:36,884 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 23:48:36,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:48:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 23:48:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-22 23:48:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 23:48:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-12-22 23:48:36,892 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 50 [2020-12-22 23:48:36,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,893 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-12-22 23:48:36,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 23:48:36,893 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-12-22 23:48:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 23:48:36,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,894 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:37,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:37,111 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash -658831097, now seen corresponding path program 8 times [2020-12-22 23:48:37,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:37,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58548717] [2020-12-22 23:48:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 23:48:37,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58548717] [2020-12-22 23:48:37,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423247391] [2020-12-22 23:48:37,326 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 [2020-12-22 23:48:37,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:37,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:37,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:48:37,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 23:48:37,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:37,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 23:48:37,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119337414] [2020-12-22 23:48:37,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:48:37,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:37,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:48:37,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:37,477 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 17 states. [2020-12-22 23:48:37,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:37,536 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2020-12-22 23:48:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:48:37,537 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-12-22 23:48:37,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:37,538 INFO L225 Difference]: With dead ends: 156 [2020-12-22 23:48:37,538 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 23:48:37,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 23:48:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-22 23:48:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 23:48:37,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-12-22 23:48:37,544 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 52 [2020-12-22 23:48:37,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:37,544 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-12-22 23:48:37,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:48:37,545 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-12-22 23:48:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 23:48:37,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:37,545 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:37,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:37,760 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash -47234807, now seen corresponding path program 9 times [2020-12-22 23:48:37,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:37,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475341451] [2020-12-22 23:48:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 23:48:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475341451] [2020-12-22 23:48:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539316655] [2020-12-22 23:48:37,943 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 [2020-12-22 23:48:38,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 23:48:38,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:38,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:38,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-12-22 23:48:38,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:38,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-22 23:48:38,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512166081] [2020-12-22 23:48:38,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 23:48:38,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:38,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 23:48:38,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-12-22 23:48:38,137 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 22 states. [2020-12-22 23:48:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:38,669 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2020-12-22 23:48:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:48:38,670 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-12-22 23:48:38,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:38,671 INFO L225 Difference]: With dead ends: 175 [2020-12-22 23:48:38,671 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 23:48:38,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:48:38,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 23:48:38,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2020-12-22 23:48:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 23:48:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2020-12-22 23:48:38,678 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 54 [2020-12-22 23:48:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:38,678 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2020-12-22 23:48:38,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 23:48:38,678 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2020-12-22 23:48:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 23:48:38,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:38,679 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:38,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:38,895 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:38,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:38,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1523186395, now seen corresponding path program 10 times [2020-12-22 23:48:38,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:38,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531588619] [2020-12-22 23:48:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:48:39,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531588619] [2020-12-22 23:48:39,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550222246] [2020-12-22 23:48:39,098 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 [2020-12-22 23:48:39,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:39,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:39,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 23:48:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:48:39,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:39,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 23:48:39,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562910457] [2020-12-22 23:48:39,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 23:48:39,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:39,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 23:48:39,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:48:39,267 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand 19 states. [2020-12-22 23:48:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:39,332 INFO L93 Difference]: Finished difference Result 172 states and 214 transitions. [2020-12-22 23:48:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:48:39,332 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-12-22 23:48:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:39,333 INFO L225 Difference]: With dead ends: 172 [2020-12-22 23:48:39,333 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 23:48:39,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:48:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 23:48:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-22 23:48:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 23:48:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2020-12-22 23:48:39,340 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 59 [2020-12-22 23:48:39,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:39,340 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2020-12-22 23:48:39,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 23:48:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2020-12-22 23:48:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 23:48:39,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:39,341 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:39,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 23:48:39,557 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:39,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:39,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1742022371, now seen corresponding path program 11 times [2020-12-22 23:48:39,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:39,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634941697] [2020-12-22 23:48:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:48:39,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634941697] [2020-12-22 23:48:39,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993835716] [2020-12-22 23:48:39,800 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 [2020-12-22 23:48:40,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-22 23:48:40,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:40,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:48:40,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:48:40,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:40,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 23:48:40,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912916818] [2020-12-22 23:48:40,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:48:40,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:40,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:48:40,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:40,107 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 20 states. [2020-12-22 23:48:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:40,190 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2020-12-22 23:48:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:48:40,190 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-12-22 23:48:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:40,191 INFO L225 Difference]: With dead ends: 174 [2020-12-22 23:48:40,191 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 23:48:40,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:40,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 23:48:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-22 23:48:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 23:48:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2020-12-22 23:48:40,203 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 61 [2020-12-22 23:48:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:40,204 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2020-12-22 23:48:40,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:48:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2020-12-22 23:48:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 23:48:40,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:40,205 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:40,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:48:40,423 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash -13446879, now seen corresponding path program 12 times [2020-12-22 23:48:40,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:40,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104702035] [2020-12-22 23:48:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:48:40,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104702035] [2020-12-22 23:48:40,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702311395] [2020-12-22 23:48:40,669 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 [2020-12-22 23:48:40,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 23:48:40,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:40,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:48:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-12-22 23:48:41,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:41,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-22 23:48:41,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193383701] [2020-12-22 23:48:41,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:48:41,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:41,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:48:41,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:41,011 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand 26 states. [2020-12-22 23:48:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:41,748 INFO L93 Difference]: Finished difference Result 193 states and 242 transitions. [2020-12-22 23:48:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 23:48:41,750 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-12-22 23:48:41,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:41,751 INFO L225 Difference]: With dead ends: 193 [2020-12-22 23:48:41,751 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 23:48:41,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=1722, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:48:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 23:48:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2020-12-22 23:48:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 23:48:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2020-12-22 23:48:41,763 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 63 [2020-12-22 23:48:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:41,763 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2020-12-22 23:48:41,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:48:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2020-12-22 23:48:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 23:48:41,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:41,764 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:41,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 23:48:41,978 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:41,978 INFO L82 PathProgramCache]: Analyzing trace with hash -412880559, now seen corresponding path program 13 times [2020-12-22 23:48:41,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:41,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318346604] [2020-12-22 23:48:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 23:48:42,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318346604] [2020-12-22 23:48:42,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137284797] [2020-12-22 23:48:42,300 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 23:48:42,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 23:48:42,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:42,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 23:48:42,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130103533] [2020-12-22 23:48:42,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 23:48:42,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:42,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 23:48:42,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 23:48:42,493 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand 22 states. [2020-12-22 23:48:42,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:42,564 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2020-12-22 23:48:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:48:42,569 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-12-22 23:48:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:42,570 INFO L225 Difference]: With dead ends: 190 [2020-12-22 23:48:42,570 INFO L226 Difference]: Without dead ends: 116 [2020-12-22 23:48:42,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 23:48:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-22 23:48:42,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-22 23:48:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 23:48:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2020-12-22 23:48:42,578 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 68 [2020-12-22 23:48:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:42,578 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2020-12-22 23:48:42,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 23:48:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2020-12-22 23:48:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 23:48:42,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:42,579 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:42,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 23:48:42,793 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:42,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1841030483, now seen corresponding path program 14 times [2020-12-22 23:48:42,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:42,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931475374] [2020-12-22 23:48:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 23:48:43,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931475374] [2020-12-22 23:48:43,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660606185] [2020-12-22 23:48:43,139 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:43,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:43,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:43,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 23:48:43,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 23:48:43,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:43,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 23:48:43,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640939916] [2020-12-22 23:48:43,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 23:48:43,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 23:48:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:48:43,381 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand 23 states. [2020-12-22 23:48:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:43,463 INFO L93 Difference]: Finished difference Result 192 states and 238 transitions. [2020-12-22 23:48:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:48:43,464 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 70 [2020-12-22 23:48:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:43,465 INFO L225 Difference]: With dead ends: 192 [2020-12-22 23:48:43,465 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 23:48:43,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:48:43,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 23:48:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-22 23:48:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 23:48:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2020-12-22 23:48:43,473 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 70 [2020-12-22 23:48:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:43,473 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2020-12-22 23:48:43,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 23:48:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2020-12-22 23:48:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 23:48:43,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:43,474 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:43,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 23:48:43,688 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:43,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1108942635, now seen corresponding path program 15 times [2020-12-22 23:48:43,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:43,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679503845] [2020-12-22 23:48:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 23:48:44,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679503845] [2020-12-22 23:48:44,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215002614] [2020-12-22 23:48:44,094 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:44,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 23:48:44,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:44,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:48:44,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-12-22 23:48:44,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:44,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 30 [2020-12-22 23:48:44,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354569760] [2020-12-22 23:48:44,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 23:48:44,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:44,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 23:48:44,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:48:44,408 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand 30 states. [2020-12-22 23:48:45,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:45,335 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2020-12-22 23:48:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 23:48:45,336 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2020-12-22 23:48:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:45,337 INFO L225 Difference]: With dead ends: 211 [2020-12-22 23:48:45,337 INFO L226 Difference]: Without dead ends: 137 [2020-12-22 23:48:45,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 23:48:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-22 23:48:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2020-12-22 23:48:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 23:48:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2020-12-22 23:48:45,345 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 72 [2020-12-22 23:48:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:45,346 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2020-12-22 23:48:45,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 23:48:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2020-12-22 23:48:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 23:48:45,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:45,347 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:45,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:45,561 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:45,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1355141543, now seen corresponding path program 16 times [2020-12-22 23:48:45,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:45,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135508014] [2020-12-22 23:48:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 23:48:45,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135508014] [2020-12-22 23:48:45,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048386237] [2020-12-22 23:48:45,999 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:46,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:46,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 23:48:46,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 23:48:46,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:46,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 23:48:46,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430003437] [2020-12-22 23:48:46,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 23:48:46,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:46,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 23:48:46,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:48:46,245 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand 25 states. [2020-12-22 23:48:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:46,353 INFO L93 Difference]: Finished difference Result 208 states and 258 transitions. [2020-12-22 23:48:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 23:48:46,353 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 77 [2020-12-22 23:48:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:46,354 INFO L225 Difference]: With dead ends: 208 [2020-12-22 23:48:46,354 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 23:48:46,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:48:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 23:48:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-22 23:48:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 23:48:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2020-12-22 23:48:46,363 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 77 [2020-12-22 23:48:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:46,364 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2020-12-22 23:48:46,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 23:48:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2020-12-22 23:48:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 23:48:46,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:46,365 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:46,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 23:48:46,577 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:46,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1126669463, now seen corresponding path program 17 times [2020-12-22 23:48:46,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:46,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463184650] [2020-12-22 23:48:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 23:48:46,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463184650] [2020-12-22 23:48:46,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236815886] [2020-12-22 23:48:46,990 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:47,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-22 23:48:47,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:47,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:48:47,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 23:48:47,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:47,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 23:48:47,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434172383] [2020-12-22 23:48:47,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:48:47,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:47,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:48:47,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:47,793 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand 26 states. [2020-12-22 23:48:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:47,886 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2020-12-22 23:48:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 23:48:47,887 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2020-12-22 23:48:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:47,888 INFO L225 Difference]: With dead ends: 210 [2020-12-22 23:48:47,888 INFO L226 Difference]: Without dead ends: 130 [2020-12-22 23:48:47,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-22 23:48:47,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-12-22 23:48:47,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-22 23:48:47,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2020-12-22 23:48:47,895 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 79 [2020-12-22 23:48:47,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:47,895 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2020-12-22 23:48:47,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:48:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2020-12-22 23:48:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 23:48:47,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:47,896 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:48,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:48,110 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:48,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1854770347, now seen corresponding path program 18 times [2020-12-22 23:48:48,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:48,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349582360] [2020-12-22 23:48:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 23:48:48,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349582360] [2020-12-22 23:48:48,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102535330] [2020-12-22 23:48:48,540 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:48,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 23:48:48,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:48,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:48,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2020-12-22 23:48:49,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:49,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2020-12-22 23:48:49,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972482899] [2020-12-22 23:48:49,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 23:48:49,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:49,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 23:48:49,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=760, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:48:49,085 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 34 states. [2020-12-22 23:48:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:50,244 INFO L93 Difference]: Finished difference Result 229 states and 286 transitions. [2020-12-22 23:48:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 23:48:50,245 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 81 [2020-12-22 23:48:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:50,246 INFO L225 Difference]: With dead ends: 229 [2020-12-22 23:48:50,246 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 23:48:50,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1080, Invalid=3080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 23:48:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 23:48:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2020-12-22 23:48:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 23:48:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2020-12-22 23:48:50,256 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 81 [2020-12-22 23:48:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:50,256 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2020-12-22 23:48:50,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 23:48:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2020-12-22 23:48:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 23:48:50,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:50,257 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:50,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 23:48:50,471 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:50,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2024057315, now seen corresponding path program 19 times [2020-12-22 23:48:50,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:50,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697828000] [2020-12-22 23:48:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 23:48:50,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697828000] [2020-12-22 23:48:50,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989475820] [2020-12-22 23:48:50,932 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:51,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 23:48:51,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 23:48:51,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:51,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 23:48:51,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922417711] [2020-12-22 23:48:51,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 23:48:51,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:51,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 23:48:51,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:48:51,137 INFO L87 Difference]: Start difference. First operand 137 states and 164 transitions. Second operand 28 states. [2020-12-22 23:48:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:51,246 INFO L93 Difference]: Finished difference Result 226 states and 280 transitions. [2020-12-22 23:48:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 23:48:51,246 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 86 [2020-12-22 23:48:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:51,247 INFO L225 Difference]: With dead ends: 226 [2020-12-22 23:48:51,248 INFO L226 Difference]: Without dead ends: 140 [2020-12-22 23:48:51,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:48:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-22 23:48:51,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-12-22 23:48:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 23:48:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2020-12-22 23:48:51,257 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 86 [2020-12-22 23:48:51,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:51,257 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2020-12-22 23:48:51,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 23:48:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2020-12-22 23:48:51,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 23:48:51,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:51,258 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:51,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:51,474 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:51,474 INFO L82 PathProgramCache]: Analyzing trace with hash -965538401, now seen corresponding path program 20 times [2020-12-22 23:48:51,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:51,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400015203] [2020-12-22 23:48:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 23:48:52,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400015203] [2020-12-22 23:48:52,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992410778] [2020-12-22 23:48:52,012 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:52,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:52,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:52,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 23:48:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 23:48:52,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:52,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 23:48:52,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889197079] [2020-12-22 23:48:52,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:48:52,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:52,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:48:52,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:52,216 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 29 states. [2020-12-22 23:48:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:52,321 INFO L93 Difference]: Finished difference Result 228 states and 282 transitions. [2020-12-22 23:48:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 23:48:52,322 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 88 [2020-12-22 23:48:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:52,323 INFO L225 Difference]: With dead ends: 228 [2020-12-22 23:48:52,323 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 23:48:52,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 23:48:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-22 23:48:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-22 23:48:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2020-12-22 23:48:52,330 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 88 [2020-12-22 23:48:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:52,331 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2020-12-22 23:48:52,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:48:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2020-12-22 23:48:52,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 23:48:52,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:52,332 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:52,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 23:48:52,548 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:52,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:52,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1636111199, now seen corresponding path program 21 times [2020-12-22 23:48:52,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:52,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413543830] [2020-12-22 23:48:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 23:48:53,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413543830] [2020-12-22 23:48:53,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166741689] [2020-12-22 23:48:53,089 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:53,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 23:48:53,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:53,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:48:53,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2020-12-22 23:48:53,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:53,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2020-12-22 23:48:53,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269805801] [2020-12-22 23:48:53,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 23:48:53,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 23:48:53,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=954, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:48:53,524 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand 38 states. [2020-12-22 23:48:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:54,803 INFO L93 Difference]: Finished difference Result 247 states and 308 transitions. [2020-12-22 23:48:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 23:48:54,804 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-12-22 23:48:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:54,805 INFO L225 Difference]: With dead ends: 247 [2020-12-22 23:48:54,805 INFO L226 Difference]: Without dead ends: 161 [2020-12-22 23:48:54,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1350, Invalid=3906, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 23:48:54,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-22 23:48:54,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2020-12-22 23:48:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-22 23:48:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2020-12-22 23:48:54,814 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 90 [2020-12-22 23:48:54,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:54,814 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2020-12-22 23:48:54,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 23:48:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2020-12-22 23:48:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 23:48:54,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:54,815 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:55,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:55,028 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:55,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1403538317, now seen corresponding path program 22 times [2020-12-22 23:48:55,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:55,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063127100] [2020-12-22 23:48:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-22 23:48:55,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063127100] [2020-12-22 23:48:55,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078518509] [2020-12-22 23:48:55,605 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:55,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:55,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 23:48:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-22 23:48:55,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:55,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 23:48:55,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174611063] [2020-12-22 23:48:55,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 23:48:55,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:55,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 23:48:55,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:48:55,851 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 31 states. [2020-12-22 23:48:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:55,985 INFO L93 Difference]: Finished difference Result 244 states and 302 transitions. [2020-12-22 23:48:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 23:48:55,985 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 95 [2020-12-22 23:48:55,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:55,986 INFO L225 Difference]: With dead ends: 244 [2020-12-22 23:48:55,986 INFO L226 Difference]: Without dead ends: 152 [2020-12-22 23:48:55,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:48:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-22 23:48:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-12-22 23:48:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 23:48:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2020-12-22 23:48:55,994 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 95 [2020-12-22 23:48:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:55,995 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2020-12-22 23:48:55,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 23:48:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2020-12-22 23:48:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 23:48:55,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:55,996 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:56,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 23:48:56,211 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:56,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1415977397, now seen corresponding path program 23 times [2020-12-22 23:48:56,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:56,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140136688] [2020-12-22 23:48:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-22 23:48:56,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140136688] [2020-12-22 23:48:56,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320301497] [2020-12-22 23:48:56,869 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:59,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-22 23:48:59,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:59,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 23:48:59,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-22 23:48:59,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:59,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 23:48:59,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387669904] [2020-12-22 23:48:59,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 23:48:59,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:59,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 23:48:59,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:48:59,139 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand 32 states. [2020-12-22 23:48:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:59,253 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2020-12-22 23:48:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 23:48:59,254 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 97 [2020-12-22 23:48:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:59,255 INFO L225 Difference]: With dead ends: 246 [2020-12-22 23:48:59,255 INFO L226 Difference]: Without dead ends: 154 [2020-12-22 23:48:59,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:48:59,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-22 23:48:59,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-22 23:48:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 23:48:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2020-12-22 23:48:59,264 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 97 [2020-12-22 23:48:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:59,265 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2020-12-22 23:48:59,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 23:48:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2020-12-22 23:48:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 23:48:59,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:59,266 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:59,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:59,480 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:59,480 INFO L82 PathProgramCache]: Analyzing trace with hash -846214775, now seen corresponding path program 24 times [2020-12-22 23:48:59,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:59,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610917170] [2020-12-22 23:48:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-22 23:49:00,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610917170] [2020-12-22 23:49:00,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468991956] [2020-12-22 23:49:00,143 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:00,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-22 23:49:00,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:49:00,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-12-22 23:49:00,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:00,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2020-12-22 23:49:00,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871861835] [2020-12-22 23:49:00,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 23:49:00,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:00,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 23:49:00,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1170, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 23:49:00,951 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 42 states. [2020-12-22 23:49:02,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:02,506 INFO L93 Difference]: Finished difference Result 265 states and 330 transitions. [2020-12-22 23:49:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 23:49:02,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 99 [2020-12-22 23:49:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:02,508 INFO L225 Difference]: With dead ends: 265 [2020-12-22 23:49:02,508 INFO L226 Difference]: Without dead ends: 173 [2020-12-22 23:49:02,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1650, Invalid=4830, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 23:49:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-22 23:49:02,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2020-12-22 23:49:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-22 23:49:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2020-12-22 23:49:02,518 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 99 [2020-12-22 23:49:02,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:02,518 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2020-12-22 23:49:02,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 23:49:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2020-12-22 23:49:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 23:49:02,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:02,522 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:02,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 23:49:02,736 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:02,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash 890676969, now seen corresponding path program 25 times [2020-12-22 23:49:02,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:02,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632899928] [2020-12-22 23:49:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-22 23:49:03,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632899928] [2020-12-22 23:49:03,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109519617] [2020-12-22 23:49:03,439 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:03,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 23:49:03,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-22 23:49:03,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:03,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 23:49:03,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673101956] [2020-12-22 23:49:03,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 23:49:03,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:03,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 23:49:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:49:03,687 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand 34 states. [2020-12-22 23:49:03,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:03,831 INFO L93 Difference]: Finished difference Result 262 states and 324 transitions. [2020-12-22 23:49:03,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 23:49:03,832 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 104 [2020-12-22 23:49:03,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:03,833 INFO L225 Difference]: With dead ends: 262 [2020-12-22 23:49:03,833 INFO L226 Difference]: Without dead ends: 164 [2020-12-22 23:49:03,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:49:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-22 23:49:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-12-22 23:49:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 23:49:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2020-12-22 23:49:03,841 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 104 [2020-12-22 23:49:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:03,841 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-12-22 23:49:03,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 23:49:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2020-12-22 23:49:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 23:49:03,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:03,843 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:04,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 23:49:04,057 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:04,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1194049045, now seen corresponding path program 26 times [2020-12-22 23:49:04,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:04,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101231506] [2020-12-22 23:49:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-22 23:49:04,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101231506] [2020-12-22 23:49:04,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564020944] [2020-12-22 23:49:04,777 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:04,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:04,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:04,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 23:49:04,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-22 23:49:05,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:05,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 23:49:05,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038830495] [2020-12-22 23:49:05,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 23:49:05,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:05,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 23:49:05,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:49:05,021 INFO L87 Difference]: Start difference. First operand 163 states and 194 transitions. Second operand 35 states. [2020-12-22 23:49:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:05,145 INFO L93 Difference]: Finished difference Result 264 states and 326 transitions. [2020-12-22 23:49:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 23:49:05,146 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 106 [2020-12-22 23:49:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:05,147 INFO L225 Difference]: With dead ends: 264 [2020-12-22 23:49:05,147 INFO L226 Difference]: Without dead ends: 166 [2020-12-22 23:49:05,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:49:05,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-22 23:49:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-12-22 23:49:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-22 23:49:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 196 transitions. [2020-12-22 23:49:05,156 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 196 transitions. Word has length 106 [2020-12-22 23:49:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:05,156 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 196 transitions. [2020-12-22 23:49:05,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 23:49:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 196 transitions. [2020-12-22 23:49:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 23:49:05,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:05,158 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:05,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 23:49:05,371 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:05,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1133978733, now seen corresponding path program 27 times [2020-12-22 23:49:05,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:05,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868267637] [2020-12-22 23:49:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-22 23:49:06,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868267637] [2020-12-22 23:49:06,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621042341] [2020-12-22 23:49:06,160 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:06,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 23:49:06,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:06,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:49:06,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-12-22 23:49:06,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:06,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 13] total 46 [2020-12-22 23:49:06,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011264681] [2020-12-22 23:49:06,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 23:49:06,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:06,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 23:49:06,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=1408, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 23:49:06,747 INFO L87 Difference]: Start difference. First operand 165 states and 196 transitions. Second operand 46 states. [2020-12-22 23:49:08,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:08,666 INFO L93 Difference]: Finished difference Result 283 states and 352 transitions. [2020-12-22 23:49:08,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 23:49:08,667 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2020-12-22 23:49:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:08,668 INFO L225 Difference]: With dead ends: 283 [2020-12-22 23:49:08,668 INFO L226 Difference]: Without dead ends: 185 [2020-12-22 23:49:08,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1980, Invalid=5852, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 23:49:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-22 23:49:08,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2020-12-22 23:49:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-22 23:49:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2020-12-22 23:49:08,682 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 108 [2020-12-22 23:49:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:08,682 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2020-12-22 23:49:08,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 23:49:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2020-12-22 23:49:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 23:49:08,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:08,684 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:08,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 23:49:08,898 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash 629447873, now seen corresponding path program 28 times [2020-12-22 23:49:08,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:08,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794945014] [2020-12-22 23:49:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 23:49:09,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794945014] [2020-12-22 23:49:09,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672236784] [2020-12-22 23:49:09,758 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:09,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:09,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:09,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 23:49:09,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 23:49:10,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:10,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 23:49:10,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925611977] [2020-12-22 23:49:10,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 23:49:10,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:10,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 23:49:10,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 23:49:10,007 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand 37 states. [2020-12-22 23:49:10,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:10,162 INFO L93 Difference]: Finished difference Result 280 states and 346 transitions. [2020-12-22 23:49:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 23:49:10,162 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 113 [2020-12-22 23:49:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:10,164 INFO L225 Difference]: With dead ends: 280 [2020-12-22 23:49:10,164 INFO L226 Difference]: Without dead ends: 176 [2020-12-22 23:49:10,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 23:49:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-22 23:49:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-12-22 23:49:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 23:49:10,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 208 transitions. [2020-12-22 23:49:10,172 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 208 transitions. Word has length 113 [2020-12-22 23:49:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:10,172 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 208 transitions. [2020-12-22 23:49:10,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 23:49:10,172 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 208 transitions. [2020-12-22 23:49:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 23:49:10,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:10,174 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:10,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 23:49:10,389 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:10,390 INFO L82 PathProgramCache]: Analyzing trace with hash -428325889, now seen corresponding path program 29 times [2020-12-22 23:49:10,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:10,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453357325] [2020-12-22 23:49:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 23:49:11,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453357325] [2020-12-22 23:49:11,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765570540] [2020-12-22 23:49:11,299 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:13,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-22 23:49:13,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:13,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 23:49:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 23:49:13,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:13,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 23:49:13,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818738120] [2020-12-22 23:49:13,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 23:49:13,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:13,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 23:49:13,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:49:13,627 INFO L87 Difference]: Start difference. First operand 175 states and 208 transitions. Second operand 38 states. [2020-12-22 23:49:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:13,777 INFO L93 Difference]: Finished difference Result 282 states and 348 transitions. [2020-12-22 23:49:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 23:49:13,778 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 115 [2020-12-22 23:49:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:13,779 INFO L225 Difference]: With dead ends: 282 [2020-12-22 23:49:13,779 INFO L226 Difference]: Without dead ends: 178 [2020-12-22 23:49:13,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:49:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-22 23:49:13,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-12-22 23:49:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 23:49:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2020-12-22 23:49:13,788 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 115 [2020-12-22 23:49:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:13,789 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2020-12-22 23:49:13,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 23:49:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2020-12-22 23:49:13,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 23:49:13,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:13,790 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:14,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 23:49:14,006 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:14,007 INFO L82 PathProgramCache]: Analyzing trace with hash 958337981, now seen corresponding path program 30 times [2020-12-22 23:49:14,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:14,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764366222] [2020-12-22 23:49:14,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 23:49:14,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764366222] [2020-12-22 23:49:14,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320401764] [2020-12-22 23:49:14,885 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:15,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-22 23:49:15,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:15,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 23:49:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2020-12-22 23:49:16,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:16,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2020-12-22 23:49:16,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772794335] [2020-12-22 23:49:16,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 23:49:16,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:16,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 23:49:16,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=1668, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 23:49:16,319 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 50 states. [2020-12-22 23:49:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:18,646 INFO L93 Difference]: Finished difference Result 301 states and 374 transitions. [2020-12-22 23:49:18,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 23:49:18,649 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 117 [2020-12-22 23:49:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:18,650 INFO L225 Difference]: With dead ends: 301 [2020-12-22 23:49:18,650 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 23:49:18,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2340, Invalid=6972, Unknown=0, NotChecked=0, Total=9312 [2020-12-22 23:49:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 23:49:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 185. [2020-12-22 23:49:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-22 23:49:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 220 transitions. [2020-12-22 23:49:18,660 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 220 transitions. Word has length 117 [2020-12-22 23:49:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:18,660 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 220 transitions. [2020-12-22 23:49:18,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 23:49:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 220 transitions. [2020-12-22 23:49:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 23:49:18,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:18,662 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:18,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 23:49:18,870 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:18,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1548854197, now seen corresponding path program 31 times [2020-12-22 23:49:18,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:18,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206792425] [2020-12-22 23:49:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 23:49:19,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206792425] [2020-12-22 23:49:19,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073236147] [2020-12-22 23:49:19,844 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:19,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 23:49:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 23:49:20,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:20,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 23:49:20,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827058184] [2020-12-22 23:49:20,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 23:49:20,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:20,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 23:49:20,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:49:20,105 INFO L87 Difference]: Start difference. First operand 185 states and 220 transitions. Second operand 40 states. [2020-12-22 23:49:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:20,259 INFO L93 Difference]: Finished difference Result 298 states and 368 transitions. [2020-12-22 23:49:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 23:49:20,260 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 122 [2020-12-22 23:49:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:20,261 INFO L225 Difference]: With dead ends: 298 [2020-12-22 23:49:20,261 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 23:49:20,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:49:20,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 23:49:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-12-22 23:49:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 23:49:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2020-12-22 23:49:20,270 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 122 [2020-12-22 23:49:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:20,270 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2020-12-22 23:49:20,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 23:49:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2020-12-22 23:49:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 23:49:20,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:20,271 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:20,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:20,486 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:20,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:20,487 INFO L82 PathProgramCache]: Analyzing trace with hash 257114679, now seen corresponding path program 32 times [2020-12-22 23:49:20,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:20,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781407634] [2020-12-22 23:49:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 23:49:21,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781407634] [2020-12-22 23:49:21,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552367274] [2020-12-22 23:49:21,572 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:21,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:21,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:21,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 23:49:21,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 23:49:21,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:21,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 23:49:21,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294010901] [2020-12-22 23:49:21,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 23:49:21,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:21,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 23:49:21,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:49:21,843 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand 41 states. [2020-12-22 23:49:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:22,026 INFO L93 Difference]: Finished difference Result 300 states and 370 transitions. [2020-12-22 23:49:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 23:49:22,027 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 124 [2020-12-22 23:49:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:22,028 INFO L225 Difference]: With dead ends: 300 [2020-12-22 23:49:22,028 INFO L226 Difference]: Without dead ends: 190 [2020-12-22 23:49:22,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:49:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-22 23:49:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2020-12-22 23:49:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 23:49:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 224 transitions. [2020-12-22 23:49:22,038 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 224 transitions. Word has length 124 [2020-12-22 23:49:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:22,038 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 224 transitions. [2020-12-22 23:49:22,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 23:49:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 224 transitions. [2020-12-22 23:49:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 23:49:22,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:22,039 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:22,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:22,253 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash 140986425, now seen corresponding path program 33 times [2020-12-22 23:49:22,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:22,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22932435] [2020-12-22 23:49:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1622 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 23:49:23,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22932435] [2020-12-22 23:49:23,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978005388] [2020-12-22 23:49:23,316 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:23,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 23:49:23,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:23,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:49:23,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1622 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1446 trivial. 0 not checked. [2020-12-22 23:49:24,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:24,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 15] total 54 [2020-12-22 23:49:24,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673905653] [2020-12-22 23:49:24,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 23:49:24,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:24,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 23:49:24,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=1950, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 23:49:24,162 INFO L87 Difference]: Start difference. First operand 189 states and 224 transitions. Second operand 54 states. [2020-12-22 23:49:26,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:26,803 INFO L93 Difference]: Finished difference Result 319 states and 396 transitions. [2020-12-22 23:49:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 23:49:26,804 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 126 [2020-12-22 23:49:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:26,805 INFO L225 Difference]: With dead ends: 319 [2020-12-22 23:49:26,805 INFO L226 Difference]: Without dead ends: 209 [2020-12-22 23:49:26,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2730, Invalid=8190, Unknown=0, NotChecked=0, Total=10920 [2020-12-22 23:49:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-22 23:49:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 197. [2020-12-22 23:49:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-22 23:49:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 234 transitions. [2020-12-22 23:49:26,815 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 234 transitions. Word has length 126 [2020-12-22 23:49:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:26,815 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 234 transitions. [2020-12-22 23:49:26,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 23:49:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 234 transitions. [2020-12-22 23:49:26,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 23:49:26,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:26,816 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:27,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:27,031 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:27,031 INFO L82 PathProgramCache]: Analyzing trace with hash -279748107, now seen corresponding path program 34 times [2020-12-22 23:49:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:27,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143096853] [2020-12-22 23:49:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 23:49:28,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143096853] [2020-12-22 23:49:28,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069614715] [2020-12-22 23:49:28,200 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:28,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:28,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:28,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 23:49:28,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 23:49:28,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:28,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 23:49:28,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798256699] [2020-12-22 23:49:28,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 23:49:28,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:28,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 23:49:28,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 23:49:28,503 INFO L87 Difference]: Start difference. First operand 197 states and 234 transitions. Second operand 43 states. [2020-12-22 23:49:28,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:28,699 INFO L93 Difference]: Finished difference Result 316 states and 390 transitions. [2020-12-22 23:49:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 23:49:28,701 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 131 [2020-12-22 23:49:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:28,703 INFO L225 Difference]: With dead ends: 316 [2020-12-22 23:49:28,703 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 23:49:28,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 23:49:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 23:49:28,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-12-22 23:49:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 23:49:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 236 transitions. [2020-12-22 23:49:28,712 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 236 transitions. Word has length 131 [2020-12-22 23:49:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:28,712 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 236 transitions. [2020-12-22 23:49:28,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 23:49:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 236 transitions. [2020-12-22 23:49:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 23:49:28,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:28,714 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:28,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 23:49:28,928 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:28,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1854862771, now seen corresponding path program 35 times [2020-12-22 23:49:28,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:28,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503211629] [2020-12-22 23:49:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1812 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 23:49:30,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503211629] [2020-12-22 23:49:30,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729895776] [2020-12-22 23:49:30,139 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:48,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-22 23:49:48,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:48,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 23:49:48,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1812 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 23:49:49,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:49,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 23:49:49,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468975578] [2020-12-22 23:49:49,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 23:49:49,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:49,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 23:49:49,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:49:49,141 INFO L87 Difference]: Start difference. First operand 199 states and 236 transitions. Second operand 44 states. [2020-12-22 23:49:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:49,347 INFO L93 Difference]: Finished difference Result 318 states and 392 transitions. [2020-12-22 23:49:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 23:49:49,347 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 133 [2020-12-22 23:49:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:49,349 INFO L225 Difference]: With dead ends: 318 [2020-12-22 23:49:49,349 INFO L226 Difference]: Without dead ends: 202 [2020-12-22 23:49:49,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:49:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-22 23:49:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2020-12-22 23:49:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-22 23:49:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 238 transitions. [2020-12-22 23:49:49,359 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 238 transitions. Word has length 133 [2020-12-22 23:49:49,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:49,359 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 238 transitions. [2020-12-22 23:49:49,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 23:49:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 238 transitions. [2020-12-22 23:49:49,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 23:49:49,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:49,360 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:49,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:49,576 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:49,577 INFO L82 PathProgramCache]: Analyzing trace with hash 221549041, now seen corresponding path program 36 times [2020-12-22 23:49:49,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:49,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791733432] [2020-12-22 23:49:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 23:49:50,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791733432] [2020-12-22 23:49:50,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605393632] [2020-12-22 23:49:50,910 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:53,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 23:49:53,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:53,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:49:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2020-12-22 23:49:53,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:53,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 16] total 58 [2020-12-22 23:49:53,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270396921] [2020-12-22 23:49:53,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 23:49:53,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 23:49:53,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1052, Invalid=2254, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 23:49:53,825 INFO L87 Difference]: Start difference. First operand 201 states and 238 transitions. Second operand 58 states. [2020-12-22 23:49:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:56,853 INFO L93 Difference]: Finished difference Result 337 states and 418 transitions. [2020-12-22 23:49:56,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 23:49:56,853 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 135 [2020-12-22 23:49:56,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:56,855 INFO L225 Difference]: With dead ends: 337 [2020-12-22 23:49:56,855 INFO L226 Difference]: Without dead ends: 221 [2020-12-22 23:49:56,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3150, Invalid=9506, Unknown=0, NotChecked=0, Total=12656 [2020-12-22 23:49:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-22 23:49:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 209. [2020-12-22 23:49:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-22 23:49:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 248 transitions. [2020-12-22 23:49:56,866 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 248 transitions. Word has length 135 [2020-12-22 23:49:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:56,867 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 248 transitions. [2020-12-22 23:49:56,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 23:49:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 248 transitions. [2020-12-22 23:49:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 23:49:56,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:56,868 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:57,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:57,084 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:57,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1195904129, now seen corresponding path program 37 times [2020-12-22 23:49:57,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:57,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30930993] [2020-12-22 23:49:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2013 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-22 23:49:58,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30930993] [2020-12-22 23:49:58,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206456872] [2020-12-22 23:49:58,451 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:58,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 23:49:58,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2013 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-22 23:49:58,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:58,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 23:49:58,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133784934] [2020-12-22 23:49:58,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 23:49:58,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:58,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 23:49:58,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 23:49:58,793 INFO L87 Difference]: Start difference. First operand 209 states and 248 transitions. Second operand 46 states. [2020-12-22 23:49:58,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:58,981 INFO L93 Difference]: Finished difference Result 334 states and 412 transitions. [2020-12-22 23:49:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 23:49:58,989 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 140 [2020-12-22 23:49:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:58,991 INFO L225 Difference]: With dead ends: 334 [2020-12-22 23:49:58,991 INFO L226 Difference]: Without dead ends: 212 [2020-12-22 23:49:58,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 23:49:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-22 23:49:59,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2020-12-22 23:49:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-22 23:49:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 250 transitions. [2020-12-22 23:49:59,004 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 250 transitions. Word has length 140 [2020-12-22 23:49:59,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:59,004 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 250 transitions. [2020-12-22 23:49:59,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 23:49:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 250 transitions. [2020-12-22 23:49:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 23:49:59,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:59,006 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:59,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 23:49:59,222 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:59,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash 887344771, now seen corresponding path program 38 times [2020-12-22 23:49:59,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:59,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577863130] [2020-12-22 23:49:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2098 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-22 23:50:00,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577863130] [2020-12-22 23:50:00,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317212406] [2020-12-22 23:50:00,638 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:00,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:50:00,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:00,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 23:50:00,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2098 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-22 23:50:00,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:00,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 23:50:00,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219007320] [2020-12-22 23:50:00,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 23:50:00,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 23:50:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:50:00,990 INFO L87 Difference]: Start difference. First operand 211 states and 250 transitions. Second operand 47 states. [2020-12-22 23:50:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:01,223 INFO L93 Difference]: Finished difference Result 336 states and 414 transitions. [2020-12-22 23:50:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 23:50:01,224 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 142 [2020-12-22 23:50:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:01,225 INFO L225 Difference]: With dead ends: 336 [2020-12-22 23:50:01,225 INFO L226 Difference]: Without dead ends: 214 [2020-12-22 23:50:01,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:50:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-22 23:50:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2020-12-22 23:50:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-22 23:50:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 252 transitions. [2020-12-22 23:50:01,236 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 252 transitions. Word has length 142 [2020-12-22 23:50:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:01,236 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 252 transitions. [2020-12-22 23:50:01,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 23:50:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 252 transitions. [2020-12-22 23:50:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 23:50:01,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:01,238 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:01,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 23:50:01,452 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:01,453 INFO L82 PathProgramCache]: Analyzing trace with hash 714545157, now seen corresponding path program 39 times [2020-12-22 23:50:01,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:01,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897308060] [2020-12-22 23:50:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-22 23:50:02,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897308060] [2020-12-22 23:50:02,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537240185] [2020-12-22 23:50:02,971 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:03,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 23:50:03,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:03,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:50:03,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 1938 trivial. 0 not checked. [2020-12-22 23:50:04,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:04,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 17] total 62 [2020-12-22 23:50:04,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547784705] [2020-12-22 23:50:04,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 23:50:04,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 23:50:04,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=2580, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 23:50:04,164 INFO L87 Difference]: Start difference. First operand 213 states and 252 transitions. Second operand 62 states. [2020-12-22 23:50:07,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:07,673 INFO L93 Difference]: Finished difference Result 355 states and 440 transitions. [2020-12-22 23:50:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 23:50:07,674 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 144 [2020-12-22 23:50:07,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:07,676 INFO L225 Difference]: With dead ends: 355 [2020-12-22 23:50:07,676 INFO L226 Difference]: Without dead ends: 233 [2020-12-22 23:50:07,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3600, Invalid=10920, Unknown=0, NotChecked=0, Total=14520 [2020-12-22 23:50:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-22 23:50:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2020-12-22 23:50:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-22 23:50:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2020-12-22 23:50:07,689 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 144 [2020-12-22 23:50:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:07,689 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2020-12-22 23:50:07,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 23:50:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2020-12-22 23:50:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 23:50:07,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:07,691 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:07,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 23:50:07,905 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:07,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:07,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2028414167, now seen corresponding path program 40 times [2020-12-22 23:50:07,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:07,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076165107] [2020-12-22 23:50:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:50:09,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076165107] [2020-12-22 23:50:09,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807782042] [2020-12-22 23:50:09,528 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:09,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:50:09,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:09,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 23:50:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:50:09,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:09,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 23:50:09,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163392138] [2020-12-22 23:50:09,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 23:50:09,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:09,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 23:50:09,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:50:09,868 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand 49 states. [2020-12-22 23:50:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:10,115 INFO L93 Difference]: Finished difference Result 352 states and 434 transitions. [2020-12-22 23:50:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 23:50:10,116 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 149 [2020-12-22 23:50:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:10,118 INFO L225 Difference]: With dead ends: 352 [2020-12-22 23:50:10,118 INFO L226 Difference]: Without dead ends: 224 [2020-12-22 23:50:10,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:50:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-22 23:50:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2020-12-22 23:50:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-22 23:50:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2020-12-22 23:50:10,128 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 149 [2020-12-22 23:50:10,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:10,129 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2020-12-22 23:50:10,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 23:50:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2020-12-22 23:50:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 23:50:10,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:10,130 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:10,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:10,344 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1210727271, now seen corresponding path program 41 times [2020-12-22 23:50:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:10,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508070015] [2020-12-22 23:50:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:50:12,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508070015] [2020-12-22 23:50:12,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971776163] [2020-12-22 23:50:12,051 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:11,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2020-12-22 23:51:11,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:11,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 23:51:11,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:51:12,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:12,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 23:51:12,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908958458] [2020-12-22 23:51:12,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 23:51:12,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:12,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 23:51:12,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 23:51:12,166 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand 50 states. [2020-12-22 23:51:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:12,414 INFO L93 Difference]: Finished difference Result 354 states and 436 transitions. [2020-12-22 23:51:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 23:51:12,415 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 151 [2020-12-22 23:51:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:12,417 INFO L225 Difference]: With dead ends: 354 [2020-12-22 23:51:12,417 INFO L226 Difference]: Without dead ends: 226 [2020-12-22 23:51:12,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 23:51:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-22 23:51:12,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2020-12-22 23:51:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-12-22 23:51:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 266 transitions. [2020-12-22 23:51:12,427 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 266 transitions. Word has length 151 [2020-12-22 23:51:12,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:12,428 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 266 transitions. [2020-12-22 23:51:12,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 23:51:12,428 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 266 transitions. [2020-12-22 23:51:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 23:51:12,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:12,429 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:12,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:12,645 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash 174359589, now seen corresponding path program 42 times [2020-12-22 23:51:12,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:12,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565413723] [2020-12-22 23:51:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2498 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:51:14,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565413723] [2020-12-22 23:51:14,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009143373] [2020-12-22 23:51:14,393 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:18,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-22 23:51:18,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:18,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 23:51:18,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2498 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2020-12-22 23:51:19,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:19,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 18] total 66 [2020-12-22 23:51:19,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841772244] [2020-12-22 23:51:19,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 23:51:19,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:19,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 23:51:19,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1362, Invalid=2928, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 23:51:19,274 INFO L87 Difference]: Start difference. First operand 225 states and 266 transitions. Second operand 66 states. [2020-12-22 23:51:23,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:23,170 INFO L93 Difference]: Finished difference Result 373 states and 462 transitions. [2020-12-22 23:51:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 23:51:23,170 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 153 [2020-12-22 23:51:23,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:23,172 INFO L225 Difference]: With dead ends: 373 [2020-12-22 23:51:23,172 INFO L226 Difference]: Without dead ends: 245 [2020-12-22 23:51:23,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2705 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4080, Invalid=12432, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 23:51:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-22 23:51:23,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 233. [2020-12-22 23:51:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-22 23:51:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 276 transitions. [2020-12-22 23:51:23,182 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 276 transitions. Word has length 153 [2020-12-22 23:51:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:23,182 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 276 transitions. [2020-12-22 23:51:23,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 23:51:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 276 transitions. [2020-12-22 23:51:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 23:51:23,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:23,184 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:23,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 23:51:23,398 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:23,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1253417293, now seen corresponding path program 43 times [2020-12-22 23:51:23,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:23,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419637424] [2020-12-22 23:51:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-22 23:51:25,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419637424] [2020-12-22 23:51:25,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295557625] [2020-12-22 23:51:25,249 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 23:51:25,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-22 23:51:25,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:25,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 23:51:25,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679873643] [2020-12-22 23:51:25,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 23:51:25,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:25,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 23:51:25,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 23:51:25,625 INFO L87 Difference]: Start difference. First operand 233 states and 276 transitions. Second operand 52 states. [2020-12-22 23:51:25,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:25,863 INFO L93 Difference]: Finished difference Result 370 states and 456 transitions. [2020-12-22 23:51:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 23:51:25,864 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 158 [2020-12-22 23:51:25,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:25,866 INFO L225 Difference]: With dead ends: 370 [2020-12-22 23:51:25,866 INFO L226 Difference]: Without dead ends: 236 [2020-12-22 23:51:25,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 23:51:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-22 23:51:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2020-12-22 23:51:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-22 23:51:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 278 transitions. [2020-12-22 23:51:25,878 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 278 transitions. Word has length 158 [2020-12-22 23:51:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:25,878 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 278 transitions. [2020-12-22 23:51:25,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 23:51:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 278 transitions. [2020-12-22 23:51:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 23:51:25,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:25,880 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:26,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:26,094 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:26,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:26,094 INFO L82 PathProgramCache]: Analyzing trace with hash -520509745, now seen corresponding path program 44 times [2020-12-22 23:51:26,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:26,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762303780] [2020-12-22 23:51:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2733 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-22 23:51:27,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762303780] [2020-12-22 23:51:27,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390410666] [2020-12-22 23:51:27,912 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:28,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:51:28,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 23:51:28,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2733 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-22 23:51:28,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:28,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 23:51:28,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149434794] [2020-12-22 23:51:28,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 23:51:28,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:28,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 23:51:28,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 23:51:28,296 INFO L87 Difference]: Start difference. First operand 235 states and 278 transitions. Second operand 53 states. [2020-12-22 23:51:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:28,559 INFO L93 Difference]: Finished difference Result 372 states and 458 transitions. [2020-12-22 23:51:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 23:51:28,560 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 160 [2020-12-22 23:51:28,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:28,562 INFO L225 Difference]: With dead ends: 372 [2020-12-22 23:51:28,562 INFO L226 Difference]: Without dead ends: 238 [2020-12-22 23:51:28,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 23:51:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-22 23:51:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2020-12-22 23:51:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-22 23:51:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 280 transitions. [2020-12-22 23:51:28,574 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 280 transitions. Word has length 160 [2020-12-22 23:51:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:28,575 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 280 transitions. [2020-12-22 23:51:28,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 23:51:28,575 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 280 transitions. [2020-12-22 23:51:28,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 23:51:28,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:28,577 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:28,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 23:51:28,790 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:28,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:28,790 INFO L82 PathProgramCache]: Analyzing trace with hash -162376751, now seen corresponding path program 45 times [2020-12-22 23:51:28,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:28,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604173429] [2020-12-22 23:51:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2832 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-22 23:51:30,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604173429] [2020-12-22 23:51:30,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414490746] [2020-12-22 23:51:30,719 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:31,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 23:51:31,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:31,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:51:31,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2832 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 2502 trivial. 0 not checked. [2020-12-22 23:51:32,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:32,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 19] total 70 [2020-12-22 23:51:32,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100299739] [2020-12-22 23:51:32,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 23:51:32,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:32,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 23:51:32,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1532, Invalid=3298, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 23:51:32,181 INFO L87 Difference]: Start difference. First operand 237 states and 280 transitions. Second operand 70 states. [2020-12-22 23:51:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:36,811 INFO L93 Difference]: Finished difference Result 391 states and 484 transitions. [2020-12-22 23:51:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 23:51:36,812 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 162 [2020-12-22 23:51:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:36,814 INFO L225 Difference]: With dead ends: 391 [2020-12-22 23:51:36,814 INFO L226 Difference]: Without dead ends: 257 [2020-12-22 23:51:36,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4590, Invalid=14042, Unknown=0, NotChecked=0, Total=18632 [2020-12-22 23:51:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-22 23:51:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 245. [2020-12-22 23:51:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-12-22 23:51:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 290 transitions. [2020-12-22 23:51:36,829 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 290 transitions. Word has length 162 [2020-12-22 23:51:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:36,829 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 290 transitions. [2020-12-22 23:51:36,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 23:51:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 290 transitions. [2020-12-22 23:51:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-22 23:51:36,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:36,831 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:37,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 23:51:37,047 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:37,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1571207075, now seen corresponding path program 46 times [2020-12-22 23:51:37,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:37,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478051600] [2020-12-22 23:51:37,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-22 23:51:39,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478051600] [2020-12-22 23:51:39,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918024720] [2020-12-22 23:51:39,175 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:39,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:51:39,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 23:51:39,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-22 23:51:39,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:39,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 23:51:39,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820193842] [2020-12-22 23:51:39,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 23:51:39,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 23:51:39,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 23:51:39,592 INFO L87 Difference]: Start difference. First operand 245 states and 290 transitions. Second operand 55 states. [2020-12-22 23:51:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:39,873 INFO L93 Difference]: Finished difference Result 388 states and 478 transitions. [2020-12-22 23:51:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 23:51:39,874 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 167 [2020-12-22 23:51:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:39,875 INFO L225 Difference]: With dead ends: 388 [2020-12-22 23:51:39,875 INFO L226 Difference]: Without dead ends: 248 [2020-12-22 23:51:39,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 23:51:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-22 23:51:39,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2020-12-22 23:51:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-22 23:51:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 292 transitions. [2020-12-22 23:51:39,885 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 292 transitions. Word has length 167 [2020-12-22 23:51:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:39,885 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 292 transitions. [2020-12-22 23:51:39,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 23:51:39,886 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 292 transitions. [2020-12-22 23:51:39,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 23:51:39,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:39,887 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:40,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-22 23:51:40,097 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1427526939, now seen corresponding path program 47 times [2020-12-22 23:51:40,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:40,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712988829] [2020-12-22 23:51:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-22 23:51:42,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712988829] [2020-12-22 23:51:42,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755837793] [2020-12-22 23:51:42,345 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true