/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:48:31,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:48:31,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:48:31,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:48:31,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:48:31,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:48:31,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:48:31,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:48:31,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:48:31,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:48:31,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:48:31,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:48:31,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:48:31,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:48:31,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:48:31,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:48:31,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:48:31,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:48:31,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:48:31,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:48:31,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:48:31,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:48:31,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:48:31,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:48:31,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:48:31,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:48:31,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:48:31,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:48:31,416 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 23:48:31,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:48:31,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:48:31,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:48:31,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:48:31,475 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:48:31,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:48:31,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:48:31,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:48:31,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:48:31,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:48:31,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:48:31,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:48:31,479 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:48:31,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:48:31,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:48:31,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:48:31,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:48:31,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:48:31,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:48:31,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:48:31,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:48:31,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:48:31,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:48:31,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:48:31,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:48:31,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:48:31,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:48:31,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:48:31,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:48:31,988 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:48:31,988 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:48:31,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2020-12-22 23:48:32,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ccc7b5199/5a8ae3668fe049a1b772cd1152b9842a/FLAG4f1470f22 [2020-12-22 23:48:32,856 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:48:32,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2020-12-22 23:48:32,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ccc7b5199/5a8ae3668fe049a1b772cd1152b9842a/FLAG4f1470f22 [2020-12-22 23:48:33,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ccc7b5199/5a8ae3668fe049a1b772cd1152b9842a [2020-12-22 23:48:33,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:48:33,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:48:33,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:33,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:48:33,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:48:33,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68afd02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33, skipping insertion in model container [2020-12-22 23:48:33,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:48:33,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:48:33,400 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-2.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 23:48:33,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:33,438 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:48:33,452 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-2.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 23:48:33,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:33,482 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:48:33,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33 WrapperNode [2020-12-22 23:48:33,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:33,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:33,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:48:33,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:48:33,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:33,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:48:33,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:48:33,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:48:33,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:48:33,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:48:33,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:48:33,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:48:33,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (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 23:48:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:48:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:48:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:48:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:48:33,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:48:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:48:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:48:34,035 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:48:34,036 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-22 23:48:34,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:34 BoogieIcfgContainer [2020-12-22 23:48:34,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:48:34,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:48:34,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:48:34,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:48:34,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:48:33" (1/3) ... [2020-12-22 23:48:34,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291ac853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:34, skipping insertion in model container [2020-12-22 23:48:34,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (2/3) ... [2020-12-22 23:48:34,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291ac853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:34, skipping insertion in model container [2020-12-22 23:48:34,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:34" (3/3) ... [2020-12-22 23:48:34,051 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2020-12-22 23:48:34,064 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:48:34,076 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 23:48:34,105 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 23:48:34,138 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:48:34,139 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:48:34,139 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:48:34,139 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:48:34,139 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:48:34,139 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:48:34,140 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:48:34,140 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:48:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-22 23:48:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 23:48:34,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,166 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,174 INFO L82 PathProgramCache]: Analyzing trace with hash 305970967, now seen corresponding path program 1 times [2020-12-22 23:48:34,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385220680] [2020-12-22 23:48:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,379 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 23:48:34,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385220680] [2020-12-22 23:48:34,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:34,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 23:48:34,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706048156] [2020-12-22 23:48:34,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 23:48:34,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:34,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 23:48:34,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 23:48:34,406 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-12-22 23:48:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,431 INFO L93 Difference]: Finished difference Result 76 states and 114 transitions. [2020-12-22 23:48:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 23:48:34,433 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-22 23:48:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,444 INFO L225 Difference]: With dead ends: 76 [2020-12-22 23:48:34,445 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 23:48:34,448 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 23:48:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 23:48:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 23:48:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 23:48:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-22 23:48:34,493 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 10 [2020-12-22 23:48:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,494 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-22 23:48:34,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 23:48:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-22 23:48:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 23:48:34,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:48:34,496 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2024314673, now seen corresponding path program 1 times [2020-12-22 23:48:34,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986447507] [2020-12-22 23:48:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,552 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 23:48:34,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986447507] [2020-12-22 23:48:34,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:34,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:48:34,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847660222] [2020-12-22 23:48:34,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:34,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:34,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:34,557 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2020-12-22 23:48:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,579 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-12-22 23:48:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:34,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 23:48:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,581 INFO L225 Difference]: With dead ends: 70 [2020-12-22 23:48:34,581 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 23:48:34,586 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 23:48:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 23:48:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-22 23:48:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 23:48:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-12-22 23:48:34,599 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 10 [2020-12-22 23:48:34,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,600 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-12-22 23:48:34,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-12-22 23:48:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 23:48:34,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 23:48:34,605 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1369117107, now seen corresponding path program 1 times [2020-12-22 23:48:34,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056759530] [2020-12-22 23:48:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,704 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 23:48:34,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056759530] [2020-12-22 23:48:34,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073443758] [2020-12-22 23:48:34,705 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 23:48:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:48:34,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:34,797 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 23:48:34,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:34,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:48:34,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344998470] [2020-12-22 23:48:34,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:34,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:34,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:34,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:34,801 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 3 states. [2020-12-22 23:48:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,849 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-12-22 23:48:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:34,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 23:48:34,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,852 INFO L225 Difference]: With dead ends: 68 [2020-12-22 23:48:34,852 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 23:48:34,852 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 23:48:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 23:48:34,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2020-12-22 23:48:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 23:48:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-22 23:48:34,860 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 12 [2020-12-22 23:48:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,860 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-22 23:48:34,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-22 23:48:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 23:48:34,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:35,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 23:48:35,078 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:35,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2104069184, now seen corresponding path program 1 times [2020-12-22 23:48:35,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:35,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125199261] [2020-12-22 23:48:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,118 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 23:48:35,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125199261] [2020-12-22 23:48:35,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20646605] [2020-12-22 23:48:35,120 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 23:48:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:48:35,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,224 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 23:48:35,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:35,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:48:35,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961080162] [2020-12-22 23:48:35,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:35,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:35,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:35,228 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 5 states. [2020-12-22 23:48:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,247 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-12-22 23:48:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:35,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-22 23:48:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,249 INFO L225 Difference]: With dead ends: 74 [2020-12-22 23:48:35,249 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 23:48:35,250 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 23:48:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 23:48:35,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-22 23:48:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 23:48:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-12-22 23:48:35,257 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 14 [2020-12-22 23:48:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:35,257 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-12-22 23:48:35,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:35,258 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-12-22 23:48:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 23:48:35,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:35,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:35,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:35,473 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:35,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1270281666, now seen corresponding path program 2 times [2020-12-22 23:48:35,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:35,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972417341] [2020-12-22 23:48:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,588 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 23:48:35,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972417341] [2020-12-22 23:48:35,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:35,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 23:48:35,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421133465] [2020-12-22 23:48:35,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:35,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:35,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:35,594 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 4 states. [2020-12-22 23:48:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,696 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-12-22 23:48:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:35,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-22 23:48:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,702 INFO L225 Difference]: With dead ends: 95 [2020-12-22 23:48:35,702 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 23:48:35,703 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 23:48:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 23:48:35,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2020-12-22 23:48:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 23:48:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-12-22 23:48:35,724 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 16 [2020-12-22 23:48:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:35,726 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-12-22 23:48:35,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:35,726 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-12-22 23:48:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 23:48:35,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:35,728 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 23:48:35,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 23:48:35,728 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:35,729 INFO L82 PathProgramCache]: Analyzing trace with hash 851634768, now seen corresponding path program 1 times [2020-12-22 23:48:35,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:35,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463520348] [2020-12-22 23:48:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,843 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 23:48:35,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463520348] [2020-12-22 23:48:35,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:35,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 23:48:35,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658816408] [2020-12-22 23:48:35,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:35,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:35,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:35,853 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 4 states. [2020-12-22 23:48:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,926 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2020-12-22 23:48:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:35,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-22 23:48:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,928 INFO L225 Difference]: With dead ends: 92 [2020-12-22 23:48:35,928 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 23:48:35,929 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 23:48:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 23:48:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-12-22 23:48:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 23:48:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-12-22 23:48:35,935 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 19 [2020-12-22 23:48:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:35,936 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-12-22 23:48:35,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-12-22 23:48:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 23:48:35,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:35,937 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 23:48:35,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 23:48:35,937 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:35,938 INFO L82 PathProgramCache]: Analyzing trace with hash 629647741, now seen corresponding path program 1 times [2020-12-22 23:48:35,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:35,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160055413] [2020-12-22 23:48:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,982 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 23:48:35,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160055413] [2020-12-22 23:48:35,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169517045] [2020-12-22 23:48:35,983 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 23:48:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:36,071 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 23:48:36,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:36,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 23:48:36,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008844660] [2020-12-22 23:48:36,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 23:48:36,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:36,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 23:48:36,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:48:36,074 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 6 states. [2020-12-22 23:48:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,093 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2020-12-22 23:48:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 23:48:36,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-22 23:48:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,094 INFO L225 Difference]: With dead ends: 94 [2020-12-22 23:48:36,095 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 23:48:36,095 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 23:48:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 23:48:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-22 23:48:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 23:48:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-12-22 23:48:36,101 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2020-12-22 23:48:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,101 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-12-22 23:48:36,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 23:48:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-12-22 23:48:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 23:48:36,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,103 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 23:48:36,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,316 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1857263233, now seen corresponding path program 2 times [2020-12-22 23:48:36,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393893922] [2020-12-22 23:48:36,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,364 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 23:48:36,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393893922] [2020-12-22 23:48:36,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83327924] [2020-12-22 23:48:36,365 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 23:48:36,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 23:48:36,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:36,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:36,493 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:36,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:36,514 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 23:48:36,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:36,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-12-22 23:48:36,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530036956] [2020-12-22 23:48:36,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 23:48:36,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:36,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 23:48:36,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:48:36,517 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 6 states. [2020-12-22 23:48:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,630 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-12-22 23:48:36,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 23:48:36,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-22 23:48:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,631 INFO L225 Difference]: With dead ends: 81 [2020-12-22 23:48:36,632 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 23:48:36,632 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 23:48:36,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 23:48:36,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2020-12-22 23:48:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 23:48:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-12-22 23:48:36,639 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 22 [2020-12-22 23:48:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,639 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-12-22 23:48:36,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 23:48:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-12-22 23:48:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 23:48:36,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,641 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 23:48:36,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,857 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,858 INFO L82 PathProgramCache]: Analyzing trace with hash -487696587, now seen corresponding path program 1 times [2020-12-22 23:48:36,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030858798] [2020-12-22 23:48:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,905 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 23:48:36,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030858798] [2020-12-22 23:48:36,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799998284] [2020-12-22 23:48:36,906 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 23:48:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:37,021 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 23:48:37,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:37,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 23:48:37,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859564332] [2020-12-22 23:48:37,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:48:37,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:37,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:48:37,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:37,024 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 7 states. [2020-12-22 23:48:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:37,047 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2020-12-22 23:48:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:48:37,048 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-22 23:48:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:37,049 INFO L225 Difference]: With dead ends: 98 [2020-12-22 23:48:37,049 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 23:48:37,050 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 23:48:37,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 23:48:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-22 23:48:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 23:48:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2020-12-22 23:48:37,056 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 26 [2020-12-22 23:48:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:37,056 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2020-12-22 23:48:37,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:48:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2020-12-22 23:48:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 23:48:37,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:37,057 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 23:48:37,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:37,272 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2115007049, now seen corresponding path program 2 times [2020-12-22 23:48:37,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:37,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901676096] [2020-12-22 23:48:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,331 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 23:48:37,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901676096] [2020-12-22 23:48:37,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565823419] [2020-12-22 23:48:37,332 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 23:48:37,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:37,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:37,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:37,442 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 23:48:37,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:37,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 23:48:37,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10200789] [2020-12-22 23:48:37,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:48:37,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:37,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:48:37,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:48:37,445 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 8 states. [2020-12-22 23:48:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:37,469 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-12-22 23:48:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:48:37,470 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-22 23:48:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:37,471 INFO L225 Difference]: With dead ends: 100 [2020-12-22 23:48:37,471 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 23:48:37,472 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 23:48:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 23:48:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-22 23:48:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 23:48:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-12-22 23:48:37,478 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 28 [2020-12-22 23:48:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:37,478 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-12-22 23:48:37,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:48:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-12-22 23:48:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 23:48:37,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:37,479 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 23:48:37,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:37,694 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:37,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:37,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1702702009, now seen corresponding path program 3 times [2020-12-22 23:48:37,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:37,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448267852] [2020-12-22 23:48:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,762 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 23:48:37,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448267852] [2020-12-22 23:48:37,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439002065] [2020-12-22 23:48:37,763 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 23:48:37,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 23:48:37,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:37,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:48:37,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:37,860 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 23:48:37,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:37,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2020-12-22 23:48:37,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932296682] [2020-12-22 23:48:37,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 23:48:37,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 23:48:37,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:48:37,863 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-12-22 23:48:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:38,009 INFO L93 Difference]: Finished difference Result 132 states and 165 transitions. [2020-12-22 23:48:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:48:38,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-12-22 23:48:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:38,011 INFO L225 Difference]: With dead ends: 132 [2020-12-22 23:48:38,011 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 23:48:38,012 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 23:48:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 23:48:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-12-22 23:48:38,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 23:48:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-12-22 23:48:38,031 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 30 [2020-12-22 23:48:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:38,031 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-12-22 23:48:38,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 23:48:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-12-22 23:48:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 23:48:38,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:38,032 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 23:48:38,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:38,246 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:38,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:38,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1917971385, now seen corresponding path program 1 times [2020-12-22 23:48:38,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:38,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050410658] [2020-12-22 23:48:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:38,315 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 23:48:38,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050410658] [2020-12-22 23:48:38,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813121703] [2020-12-22 23:48:38,315 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 23:48:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:38,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:48:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:38,487 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 23:48:38,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:38,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 23:48:38,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039477656] [2020-12-22 23:48:38,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 23:48:38,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:38,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 23:48:38,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:48:38,490 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 10 states. [2020-12-22 23:48:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:38,523 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2020-12-22 23:48:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:48:38,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-22 23:48:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:38,524 INFO L225 Difference]: With dead ends: 120 [2020-12-22 23:48:38,524 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 23:48:38,527 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 23:48:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 23:48:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-22 23:48:38,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 23:48:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-12-22 23:48:38,538 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 32 [2020-12-22 23:48:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:38,538 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-12-22 23:48:38,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 23:48:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-12-22 23:48:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 23:48:38,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:38,542 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 23:48:38,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:48:38,757 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:38,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2046605499, now seen corresponding path program 2 times [2020-12-22 23:48:38,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:38,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762369067] [2020-12-22 23:48:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:38,841 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 23:48:38,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762369067] [2020-12-22 23:48:38,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040913588] [2020-12-22 23:48:38,842 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 23:48:38,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:38,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:38,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:38,933 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 23:48:38,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:38,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:48:38,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669397437] [2020-12-22 23:48:38,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:48:38,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:38,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:48:38,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:38,936 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 11 states. [2020-12-22 23:48:38,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:38,967 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2020-12-22 23:48:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:48:38,968 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-22 23:48:38,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:38,969 INFO L225 Difference]: With dead ends: 122 [2020-12-22 23:48:38,969 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 23:48:38,969 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 23:48:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 23:48:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-22 23:48:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 23:48:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2020-12-22 23:48:38,974 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 34 [2020-12-22 23:48:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:38,974 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2020-12-22 23:48:38,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:48:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2020-12-22 23:48:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 23:48:38,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:38,975 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 23:48:39,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:39,190 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1109937469, now seen corresponding path program 3 times [2020-12-22 23:48:39,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:39,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292099982] [2020-12-22 23:48:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:39,285 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 23:48:39,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292099982] [2020-12-22 23:48:39,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114463894] [2020-12-22 23:48:39,286 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 23:48:39,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 23:48:39,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:39,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:48:39,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:39,388 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 23:48:39,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:39,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2020-12-22 23:48:39,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115165313] [2020-12-22 23:48:39,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:39,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:39,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:39,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:39,391 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand 14 states. [2020-12-22 23:48:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:39,655 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2020-12-22 23:48:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:48:39,656 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-22 23:48:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:39,657 INFO L225 Difference]: With dead ends: 140 [2020-12-22 23:48:39,657 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 23:48:39,658 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 23:48:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 23:48:39,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2020-12-22 23:48:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 23:48:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2020-12-22 23:48:39,664 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 36 [2020-12-22 23:48:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:39,664 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2020-12-22 23:48:39,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:39,664 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2020-12-22 23:48:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 23:48:39,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:39,665 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 23:48:39,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:39,880 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:39,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:39,881 INFO L82 PathProgramCache]: Analyzing trace with hash 102207473, now seen corresponding path program 4 times [2020-12-22 23:48:39,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:39,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169511822] [2020-12-22 23:48:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:40,016 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 23:48:40,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169511822] [2020-12-22 23:48:40,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657778222] [2020-12-22 23:48:40,017 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 23:48:40,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:40,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:40,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:48:40,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:40,180 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 23:48:40,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:40,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 23:48:40,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223702707] [2020-12-22 23:48:40,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:48:40,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:40,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:48:40,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:48:40,183 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 13 states. [2020-12-22 23:48:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:40,235 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2020-12-22 23:48:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:48:40,235 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-12-22 23:48:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:40,237 INFO L225 Difference]: With dead ends: 136 [2020-12-22 23:48:40,237 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 23:48:40,241 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 23:48:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 23:48:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-22 23:48:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 23:48:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2020-12-22 23:48:40,247 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 41 [2020-12-22 23:48:40,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:40,247 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2020-12-22 23:48:40,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:48:40,247 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2020-12-22 23:48:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 23:48:40,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:40,252 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 23:48:40,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 23:48:40,467 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:40,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1244248785, now seen corresponding path program 5 times [2020-12-22 23:48:40,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:40,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472584214] [2020-12-22 23:48:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:40,623 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 23:48:40,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472584214] [2020-12-22 23:48:40,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298892376] [2020-12-22 23:48:40,624 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 23:48:40,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-22 23:48:40,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:40,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:48:40,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:40,787 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 23:48:40,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:40,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 23:48:40,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109172465] [2020-12-22 23:48:40,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:40,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:40,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:40,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:40,789 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 14 states. [2020-12-22 23:48:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:40,846 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2020-12-22 23:48:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:48:40,846 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-12-22 23:48:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:40,847 INFO L225 Difference]: With dead ends: 138 [2020-12-22 23:48:40,847 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 23:48:40,848 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 23:48:40,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 23:48:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-22 23:48:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 23:48:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2020-12-22 23:48:40,852 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 43 [2020-12-22 23:48:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:40,853 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2020-12-22 23:48:40,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:40,853 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2020-12-22 23:48:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 23:48:40,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:40,853 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 23:48:41,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 23:48:41,067 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:41,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1891410669, now seen corresponding path program 6 times [2020-12-22 23:48:41,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:41,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808413322] [2020-12-22 23:48:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:41,186 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 23:48:41,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808413322] [2020-12-22 23:48:41,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672619303] [2020-12-22 23:48:41,187 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 23:48:41,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 23:48:41,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:41,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:41,321 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 23:48:41,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:41,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2020-12-22 23:48:41,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598473866] [2020-12-22 23:48:41,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:48:41,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:48:41,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:41,325 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand 18 states. [2020-12-22 23:48:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:41,662 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2020-12-22 23:48:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:48:41,662 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-12-22 23:48:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:41,663 INFO L225 Difference]: With dead ends: 157 [2020-12-22 23:48:41,663 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 23:48:41,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:48:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 23:48:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2020-12-22 23:48:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 23:48:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-12-22 23:48:41,687 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 45 [2020-12-22 23:48:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:41,688 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-12-22 23:48:41,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:48:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-12-22 23:48:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 23:48:41,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:41,689 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 23:48:41,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:48:41,892 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1678460795, now seen corresponding path program 7 times [2020-12-22 23:48:41,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:41,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908904796] [2020-12-22 23:48:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,091 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 23:48:42,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908904796] [2020-12-22 23:48:42,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402894115] [2020-12-22 23:48:42,092 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 23:48:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:48:42,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:42,220 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 23:48:42,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:42,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 23:48:42,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99290417] [2020-12-22 23:48:42,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 23:48:42,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:42,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 23:48:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:48:42,223 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 16 states. [2020-12-22 23:48:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:42,277 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2020-12-22 23:48:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 23:48:42,278 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-12-22 23:48:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:42,279 INFO L225 Difference]: With dead ends: 154 [2020-12-22 23:48:42,279 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 23:48:42,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:48:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 23:48:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-22 23:48:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 23:48:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-12-22 23:48:42,286 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 50 [2020-12-22 23:48:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:42,286 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-12-22 23:48:42,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 23:48:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-12-22 23:48:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 23:48:42,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:42,287 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 23:48:42,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:42,503 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:42,505 INFO L82 PathProgramCache]: Analyzing trace with hash -658831097, now seen corresponding path program 8 times [2020-12-22 23:48:42,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:42,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671538906] [2020-12-22 23:48:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,658 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 23:48:42,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671538906] [2020-12-22 23:48:42,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580960092] [2020-12-22 23:48:42,658 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 23:48:42,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:42,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:42,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:48:42,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:42,798 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 23:48:42,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:42,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 23:48:42,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261688166] [2020-12-22 23:48:42,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:48:42,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:42,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:48:42,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:42,801 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 17 states. [2020-12-22 23:48:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:42,871 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2020-12-22 23:48:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:48:42,872 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-12-22 23:48:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:42,873 INFO L225 Difference]: With dead ends: 156 [2020-12-22 23:48:42,873 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 23:48:42,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 23:48:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-22 23:48:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 23:48:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-12-22 23:48:42,882 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 52 [2020-12-22 23:48:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:42,884 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-12-22 23:48:42,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:48:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-12-22 23:48:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 23:48:42,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:42,885 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 23:48:43,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:43,099 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:43,100 INFO L82 PathProgramCache]: Analyzing trace with hash -47234807, now seen corresponding path program 9 times [2020-12-22 23:48:43,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:43,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093399272] [2020-12-22 23:48:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:43,257 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 23:48:43,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093399272] [2020-12-22 23:48:43,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977764044] [2020-12-22 23:48:43,258 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 23:48:43,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 23:48:43,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:43,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:43,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:43,420 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 23:48:43,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:43,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-22 23:48:43,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165298227] [2020-12-22 23:48:43,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 23:48:43,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 23:48:43,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-12-22 23:48:43,423 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 22 states. [2020-12-22 23:48:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:43,914 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2020-12-22 23:48:43,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:48:43,915 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-12-22 23:48:43,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:43,916 INFO L225 Difference]: With dead ends: 175 [2020-12-22 23:48:43,916 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 23:48:43,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:48:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 23:48:43,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2020-12-22 23:48:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 23:48:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2020-12-22 23:48:43,925 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 54 [2020-12-22 23:48:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:43,925 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2020-12-22 23:48:43,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 23:48:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2020-12-22 23:48:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 23:48:43,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:43,926 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 23:48:44,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:44,141 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:44,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1523186395, now seen corresponding path program 10 times [2020-12-22 23:48:44,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:44,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127611779] [2020-12-22 23:48:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:44,343 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 23:48:44,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127611779] [2020-12-22 23:48:44,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929843488] [2020-12-22 23:48:44,343 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 23:48:44,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:44,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:44,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 23:48:44,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:44,479 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 23:48:44,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:44,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 23:48:44,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328374153] [2020-12-22 23:48:44,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 23:48:44,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 23:48:44,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:48:44,481 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand 19 states. [2020-12-22 23:48:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:44,544 INFO L93 Difference]: Finished difference Result 172 states and 214 transitions. [2020-12-22 23:48:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:48:44,549 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-12-22 23:48:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:44,551 INFO L225 Difference]: With dead ends: 172 [2020-12-22 23:48:44,552 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 23:48:44,553 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 23:48:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 23:48:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-22 23:48:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 23:48:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2020-12-22 23:48:44,564 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 59 [2020-12-22 23:48:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:44,564 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2020-12-22 23:48:44,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 23:48:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2020-12-22 23:48:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 23:48:44,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:44,565 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 23:48:44,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 23:48:44,781 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:44,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1742022371, now seen corresponding path program 11 times [2020-12-22 23:48:44,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:44,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936994025] [2020-12-22 23:48:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:45,001 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 23:48:45,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936994025] [2020-12-22 23:48:45,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376008327] [2020-12-22 23:48:45,002 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 23:48:45,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-22 23:48:45,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:48:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:45,326 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 23:48:45,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:45,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 23:48:45,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160051437] [2020-12-22 23:48:45,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:48:45,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:45,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:48:45,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:45,329 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 20 states. [2020-12-22 23:48:45,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:45,384 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2020-12-22 23:48:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:48:45,384 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-12-22 23:48:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:45,385 INFO L225 Difference]: With dead ends: 174 [2020-12-22 23:48:45,385 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 23:48:45,386 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 23:48:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 23:48:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-22 23:48:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 23:48:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2020-12-22 23:48:45,392 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 61 [2020-12-22 23:48:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:45,392 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2020-12-22 23:48:45,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:48:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2020-12-22 23:48:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 23:48:45,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:45,393 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 23:48:45,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:48:45,609 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:45,610 INFO L82 PathProgramCache]: Analyzing trace with hash -13446879, now seen corresponding path program 12 times [2020-12-22 23:48:45,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:45,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503724572] [2020-12-22 23:48:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:45,827 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 23:48:45,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503724572] [2020-12-22 23:48:45,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461254270] [2020-12-22 23:48:45,828 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 23:48:45,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 23:48:45,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:45,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:48:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:46,093 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 23:48:46,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:46,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-22 23:48:46,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348522064] [2020-12-22 23:48:46,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:48:46,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:46,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:48:46,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:46,095 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand 26 states. [2020-12-22 23:48:46,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:46,710 INFO L93 Difference]: Finished difference Result 193 states and 242 transitions. [2020-12-22 23:48:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 23:48:46,710 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-12-22 23:48:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:46,712 INFO L225 Difference]: With dead ends: 193 [2020-12-22 23:48:46,712 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 23:48:46,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=1722, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:48:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 23:48:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2020-12-22 23:48:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 23:48:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2020-12-22 23:48:46,724 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 63 [2020-12-22 23:48:46,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:46,724 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2020-12-22 23:48:46,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:48:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2020-12-22 23:48:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 23:48:46,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:46,729 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 23:48:46,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 23:48:46,944 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:46,944 INFO L82 PathProgramCache]: Analyzing trace with hash -412880559, now seen corresponding path program 13 times [2020-12-22 23:48:46,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:46,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060484306] [2020-12-22 23:48:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:47,225 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 23:48:47,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060484306] [2020-12-22 23:48:47,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938079007] [2020-12-22 23:48:47,227 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 23:48:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:47,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 23:48:47,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:47,468 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 23:48:47,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:47,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 23:48:47,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142465636] [2020-12-22 23:48:47,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 23:48:47,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:47,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 23:48:47,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 23:48:47,472 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand 22 states. [2020-12-22 23:48:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:47,541 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2020-12-22 23:48:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:48:47,541 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-12-22 23:48:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:47,542 INFO L225 Difference]: With dead ends: 190 [2020-12-22 23:48:47,543 INFO L226 Difference]: Without dead ends: 116 [2020-12-22 23:48:47,543 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 23:48:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-22 23:48:47,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-22 23:48:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 23:48:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2020-12-22 23:48:47,550 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 68 [2020-12-22 23:48:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:47,550 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2020-12-22 23:48:47,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 23:48:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2020-12-22 23:48:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 23:48:47,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:47,552 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 23:48:47,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 23:48:47,767 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:47,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1841030483, now seen corresponding path program 14 times [2020-12-22 23:48:47,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:47,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141499220] [2020-12-22 23:48:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:48,034 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 23:48:48,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141499220] [2020-12-22 23:48:48,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756781733] [2020-12-22 23:48:48,034 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 23:48:48,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:48,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:48,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 23:48:48,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:48,190 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 23:48:48,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:48,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 23:48:48,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62975457] [2020-12-22 23:48:48,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 23:48:48,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:48,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 23:48:48,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:48:48,193 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand 23 states. [2020-12-22 23:48:48,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:48,252 INFO L93 Difference]: Finished difference Result 192 states and 238 transitions. [2020-12-22 23:48:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:48:48,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 70 [2020-12-22 23:48:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:48,254 INFO L225 Difference]: With dead ends: 192 [2020-12-22 23:48:48,254 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 23:48:48,255 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 23:48:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 23:48:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-22 23:48:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 23:48:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2020-12-22 23:48:48,262 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 70 [2020-12-22 23:48:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:48,262 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2020-12-22 23:48:48,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 23:48:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2020-12-22 23:48:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 23:48:48,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:48,263 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 23:48:48,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 23:48:48,478 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:48,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:48,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1108942635, now seen corresponding path program 15 times [2020-12-22 23:48:48,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:48,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304963680] [2020-12-22 23:48:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:48,771 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 23:48:48,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304963680] [2020-12-22 23:48:48,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054242214] [2020-12-22 23:48:48,772 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 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 23:48:48,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 23:48:48,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:48,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 23:48:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 39 proven. 35 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-22 23:48:49,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:49,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 32 [2020-12-22 23:48:49,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714137777] [2020-12-22 23:48:49,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 23:48:49,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:49,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 23:48:49,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=663, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:48:49,072 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand 32 states. [2020-12-22 23:48:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:49,947 INFO L93 Difference]: Finished difference Result 212 states and 266 transitions. [2020-12-22 23:48:49,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 23:48:49,950 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-12-22 23:48:49,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:49,952 INFO L225 Difference]: With dead ends: 212 [2020-12-22 23:48:49,952 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 23:48:49,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=993, Invalid=2667, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 23:48:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 23:48:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 127. [2020-12-22 23:48:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 23:48:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2020-12-22 23:48:49,961 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 72 [2020-12-22 23:48:49,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:49,962 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2020-12-22 23:48:49,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 23:48:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2020-12-22 23:48:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 23:48:49,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:49,963 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 23:48:50,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:50,179 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:50,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1126669463, now seen corresponding path program 16 times [2020-12-22 23:48:50,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:50,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662525257] [2020-12-22 23:48:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:50,486 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 23:48:50,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662525257] [2020-12-22 23:48:50,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120179965] [2020-12-22 23:48:50,487 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 23:48:50,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:50,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:48:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:50,667 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 23:48:50,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:50,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 23:48:50,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490438293] [2020-12-22 23:48:50,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:48:50,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:48:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:50,670 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand 26 states. [2020-12-22 23:48:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:50,748 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2020-12-22 23:48:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 23:48:50,749 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2020-12-22 23:48:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:50,750 INFO L225 Difference]: With dead ends: 210 [2020-12-22 23:48:50,750 INFO L226 Difference]: Without dead ends: 130 [2020-12-22 23:48:50,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-22 23:48:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-12-22 23:48:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-22 23:48:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2020-12-22 23:48:50,759 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 79 [2020-12-22 23:48:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:50,759 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2020-12-22 23:48:50,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:48:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2020-12-22 23:48:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 23:48:50,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:50,760 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 23:48:50,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 23:48:50,976 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1854770347, now seen corresponding path program 17 times [2020-12-22 23:48:50,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:50,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918933364] [2020-12-22 23:48:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:51,307 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 23:48:51,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918933364] [2020-12-22 23:48:51,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644050584] [2020-12-22 23:48:51,308 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 23:48:52,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 23:48:52,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:52,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 23:48:52,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:52,530 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 23:48:52,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:52,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 23:48:52,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603666959] [2020-12-22 23:48:52,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 23:48:52,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:52,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 23:48:52,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:48:52,533 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 27 states. [2020-12-22 23:48:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:52,624 INFO L93 Difference]: Finished difference Result 212 states and 262 transitions. [2020-12-22 23:48:52,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 23:48:52,624 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 81 [2020-12-22 23:48:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:52,625 INFO L225 Difference]: With dead ends: 212 [2020-12-22 23:48:52,625 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 23:48:52,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:48:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 23:48:52,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-12-22 23:48:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 23:48:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2020-12-22 23:48:52,633 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 81 [2020-12-22 23:48:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:52,633 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2020-12-22 23:48:52,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 23:48:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2020-12-22 23:48:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 23:48:52,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:52,634 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:52,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:52,848 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:52,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2019725971, now seen corresponding path program 18 times [2020-12-22 23:48:52,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:52,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140583068] [2020-12-22 23:48:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 23:48:53,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140583068] [2020-12-22 23:48:53,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163681775] [2020-12-22 23:48:53,243 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 23:48:53,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 23:48:53,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:53,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:53,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-12-22 23:48:53,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:53,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2020-12-22 23:48:53,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248671184] [2020-12-22 23:48:53,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 23:48:53,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:53,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 23:48:53,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:48:53,661 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand 35 states. [2020-12-22 23:48:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:54,594 INFO L93 Difference]: Finished difference Result 231 states and 288 transitions. [2020-12-22 23:48:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 23:48:54,595 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 83 [2020-12-22 23:48:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:54,596 INFO L225 Difference]: With dead ends: 231 [2020-12-22 23:48:54,596 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 23:48:54,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1158, Invalid=3264, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 23:48:54,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 23:48:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2020-12-22 23:48:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 23:48:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2020-12-22 23:48:54,606 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 83 [2020-12-22 23:48:54,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:54,606 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2020-12-22 23:48:54,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 23:48:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2020-12-22 23:48:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 23:48:54,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:54,607 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 23:48:54,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 23:48:54,821 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:54,822 INFO L82 PathProgramCache]: Analyzing trace with hash -965538401, now seen corresponding path program 19 times [2020-12-22 23:48:54,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:54,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199795463] [2020-12-22 23:48:54,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:55,212 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 23:48:55,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199795463] [2020-12-22 23:48:55,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128284925] [2020-12-22 23:48:55,213 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 23:48:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 23:48:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:55,396 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 23:48:55,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:55,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 23:48:55,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668170499] [2020-12-22 23:48:55,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:48:55,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:55,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:48:55,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:55,398 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 29 states. [2020-12-22 23:48:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:55,483 INFO L93 Difference]: Finished difference Result 228 states and 282 transitions. [2020-12-22 23:48:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 23:48:55,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 88 [2020-12-22 23:48:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:55,485 INFO L225 Difference]: With dead ends: 228 [2020-12-22 23:48:55,485 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 23:48:55,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 23:48:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-22 23:48:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-22 23:48:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2020-12-22 23:48:55,494 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 88 [2020-12-22 23:48:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:55,494 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2020-12-22 23:48:55,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:48:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2020-12-22 23:48:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 23:48:55,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:55,495 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 23:48:55,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:55,711 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:55,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:55,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1636111199, now seen corresponding path program 20 times [2020-12-22 23:48:55,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:55,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966245471] [2020-12-22 23:48:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:56,110 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 23:48:56,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966245471] [2020-12-22 23:48:56,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825728839] [2020-12-22 23:48:56,111 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 23:48:56,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:56,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:56,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 23:48:56,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:56,300 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 23:48:56,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:56,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 23:48:56,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193505982] [2020-12-22 23:48:56,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 23:48:56,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:56,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 23:48:56,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:48:56,305 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand 30 states. [2020-12-22 23:48:56,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:56,426 INFO L93 Difference]: Finished difference Result 230 states and 284 transitions. [2020-12-22 23:48:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:48:56,426 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 90 [2020-12-22 23:48:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:56,428 INFO L225 Difference]: With dead ends: 230 [2020-12-22 23:48:56,428 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 23:48:56,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:48:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 23:48:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-12-22 23:48:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-22 23:48:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2020-12-22 23:48:56,435 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 90 [2020-12-22 23:48:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:56,435 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2020-12-22 23:48:56,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 23:48:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2020-12-22 23:48:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 23:48:56,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:56,437 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:56,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 23:48:56,652 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:56,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:56,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1811475677, now seen corresponding path program 21 times [2020-12-22 23:48:56,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:56,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897341655] [2020-12-22 23:48:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 23:48:57,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897341655] [2020-12-22 23:48:57,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694281468] [2020-12-22 23:48:57,108 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 23:48:57,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 23:48:57,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:57,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:48:57,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-12-22 23:48:57,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:57,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2020-12-22 23:48:57,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754113663] [2020-12-22 23:48:57,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 23:48:57,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 23:48:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1001, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 23:48:57,436 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand 39 states. [2020-12-22 23:48:58,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:58,594 INFO L93 Difference]: Finished difference Result 249 states and 310 transitions. [2020-12-22 23:48:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 23:48:58,594 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-12-22 23:48:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:58,595 INFO L225 Difference]: With dead ends: 249 [2020-12-22 23:48:58,595 INFO L226 Difference]: Without dead ends: 163 [2020-12-22 23:48:58,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1437, Invalid=4113, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 23:48:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-22 23:48:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2020-12-22 23:48:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 23:48:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2020-12-22 23:48:58,605 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 92 [2020-12-22 23:48:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:58,605 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2020-12-22 23:48:58,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 23:48:58,606 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2020-12-22 23:48:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 23:48:58,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:58,607 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 23:48:58,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:58,820 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:58,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1415977397, now seen corresponding path program 22 times [2020-12-22 23:48:58,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:58,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76353825] [2020-12-22 23:48:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:59,257 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 23:48:59,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76353825] [2020-12-22 23:48:59,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342805981] [2020-12-22 23:48:59,258 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 23:48:59,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:59,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:59,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 23:48:59,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:59,437 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 23:48:59,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:59,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 23:48:59,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160215082] [2020-12-22 23:48:59,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 23:48:59,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:59,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 23:48:59,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:48:59,440 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand 32 states. [2020-12-22 23:48:59,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:59,541 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2020-12-22 23:48:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 23:48:59,542 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 97 [2020-12-22 23:48:59,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:59,543 INFO L225 Difference]: With dead ends: 246 [2020-12-22 23:48:59,543 INFO L226 Difference]: Without dead ends: 154 [2020-12-22 23:48:59,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:48:59,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-22 23:48:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-22 23:48:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 23:48:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2020-12-22 23:48:59,550 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 97 [2020-12-22 23:48:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:59,550 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2020-12-22 23:48:59,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 23:48:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2020-12-22 23:48:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 23:48:59,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:59,551 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 23:48:59,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 23:48:59,764 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:59,765 INFO L82 PathProgramCache]: Analyzing trace with hash -846214775, now seen corresponding path program 23 times [2020-12-22 23:48:59,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:59,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269266493] [2020-12-22 23:48:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:00,272 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 23:49:00,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269266493] [2020-12-22 23:49:00,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788012601] [2020-12-22 23:49:00,272 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 23:49:05,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 23:49:05,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 23:49:05,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:05,635 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 23:49:05,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:05,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 23:49:05,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712568513] [2020-12-22 23:49:05,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 23:49:05,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:05,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 23:49:05,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:49:05,638 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 33 states. [2020-12-22 23:49:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:05,742 INFO L93 Difference]: Finished difference Result 248 states and 306 transitions. [2020-12-22 23:49:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 23:49:05,743 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 99 [2020-12-22 23:49:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:05,744 INFO L225 Difference]: With dead ends: 248 [2020-12-22 23:49:05,744 INFO L226 Difference]: Without dead ends: 156 [2020-12-22 23:49:05,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:49:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-22 23:49:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-12-22 23:49:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 23:49:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-12-22 23:49:05,752 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 99 [2020-12-22 23:49:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:05,752 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-12-22 23:49:05,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 23:49:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-12-22 23:49:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 23:49:05,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:05,753 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:05,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:05,968 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1234818375, now seen corresponding path program 24 times [2020-12-22 23:49:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:05,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647102645] [2020-12-22 23:49:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-22 23:49:06,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647102645] [2020-12-22 23:49:06,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073307780] [2020-12-22 23:49:06,562 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 23:49:07,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-22 23:49:07,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:07,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:49:07,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 59 proven. 92 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-12-22 23:49:07,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:07,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 14] total 45 [2020-12-22 23:49:07,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061267825] [2020-12-22 23:49:07,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 23:49:07,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:07,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 23:49:07,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1329, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 23:49:07,355 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 45 states. [2020-12-22 23:49:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:08,741 INFO L93 Difference]: Finished difference Result 268 states and 334 transitions. [2020-12-22 23:49:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 23:49:08,742 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 101 [2020-12-22 23:49:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:08,743 INFO L225 Difference]: With dead ends: 268 [2020-12-22 23:49:08,743 INFO L226 Difference]: Without dead ends: 176 [2020-12-22 23:49:08,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1965, Invalid=5517, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 23:49:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-22 23:49:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 165. [2020-12-22 23:49:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-22 23:49:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 196 transitions. [2020-12-22 23:49:08,754 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 196 transitions. Word has length 101 [2020-12-22 23:49:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:08,754 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 196 transitions. [2020-12-22 23:49:08,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 23:49:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 196 transitions. [2020-12-22 23:49:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 23:49:08,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:08,755 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 23:49:08,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 23:49:08,972 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:08,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:08,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1133978733, now seen corresponding path program 25 times [2020-12-22 23:49:08,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:08,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865895375] [2020-12-22 23:49:08,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:09,600 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 23:49:09,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865895375] [2020-12-22 23:49:09,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781717643] [2020-12-22 23:49:09,601 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 23:49:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:09,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 23:49:09,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:09,794 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 23:49:09,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:09,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 23:49:09,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004202640] [2020-12-22 23:49:09,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 23:49:09,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:09,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 23:49:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:49:09,796 INFO L87 Difference]: Start difference. First operand 165 states and 196 transitions. Second operand 36 states. [2020-12-22 23:49:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:09,905 INFO L93 Difference]: Finished difference Result 266 states and 328 transitions. [2020-12-22 23:49:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 23:49:09,905 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 108 [2020-12-22 23:49:09,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:09,906 INFO L225 Difference]: With dead ends: 266 [2020-12-22 23:49:09,907 INFO L226 Difference]: Without dead ends: 168 [2020-12-22 23:49:09,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:49:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-22 23:49:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-12-22 23:49:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 23:49:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2020-12-22 23:49:09,915 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 108 [2020-12-22 23:49:09,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:09,915 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2020-12-22 23:49:09,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 23:49:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2020-12-22 23:49:09,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 23:49:09,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:09,916 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:10,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 23:49:10,131 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:10,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:10,132 INFO L82 PathProgramCache]: Analyzing trace with hash 690712175, now seen corresponding path program 26 times [2020-12-22 23:49:10,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:10,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173890229] [2020-12-22 23:49:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-22 23:49:10,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173890229] [2020-12-22 23:49:10,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665966428] [2020-12-22 23:49:10,783 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 23:49:10,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:10,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 23:49:10,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-22 23:49:11,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:11,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 23:49:11,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423045363] [2020-12-22 23:49:11,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 23:49:11,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:11,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 23:49:11,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 23:49:11,012 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand 37 states. [2020-12-22 23:49:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:11,136 INFO L93 Difference]: Finished difference Result 268 states and 330 transitions. [2020-12-22 23:49:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 23:49:11,136 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 110 [2020-12-22 23:49:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:11,137 INFO L225 Difference]: With dead ends: 268 [2020-12-22 23:49:11,137 INFO L226 Difference]: Without dead ends: 170 [2020-12-22 23:49:11,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 23:49:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-22 23:49:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-12-22 23:49:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 23:49:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2020-12-22 23:49:11,145 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 110 [2020-12-22 23:49:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:11,145 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2020-12-22 23:49:11,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 23:49:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2020-12-22 23:49:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 23:49:11,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:11,146 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:11,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 23:49:11,360 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash -86687759, now seen corresponding path program 27 times [2020-12-22 23:49:11,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:11,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296405986] [2020-12-22 23:49:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-22 23:49:11,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296405986] [2020-12-22 23:49:11,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815180007] [2020-12-22 23:49:11,984 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 23:49:12,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 23:49:12,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:12,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:49:12,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2020-12-22 23:49:12,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:12,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 13] total 48 [2020-12-22 23:49:12,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226959925] [2020-12-22 23:49:12,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 23:49:12,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:12,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 23:49:12,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1523, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 23:49:12,466 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand 48 states. [2020-12-22 23:49:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:14,196 INFO L93 Difference]: Finished difference Result 287 states and 356 transitions. [2020-12-22 23:49:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 23:49:14,196 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 112 [2020-12-22 23:49:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:14,197 INFO L225 Difference]: With dead ends: 287 [2020-12-22 23:49:14,197 INFO L226 Difference]: Without dead ends: 189 [2020-12-22 23:49:14,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2193, Invalid=6363, Unknown=0, NotChecked=0, Total=8556 [2020-12-22 23:49:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-22 23:49:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 177. [2020-12-22 23:49:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 23:49:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2020-12-22 23:49:14,207 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 112 [2020-12-22 23:49:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:14,207 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2020-12-22 23:49:14,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 23:49:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2020-12-22 23:49:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 23:49:14,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:14,209 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 23:49:14,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 23:49:14,425 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash 958337981, now seen corresponding path program 28 times [2020-12-22 23:49:14,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:14,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977552204] [2020-12-22 23:49:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:15,096 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 23:49:15,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977552204] [2020-12-22 23:49:15,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727843387] [2020-12-22 23:49:15,097 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 23:49:15,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:15,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:15,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 23:49:15,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:15,328 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 23:49:15,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:15,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 23:49:15,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97929733] [2020-12-22 23:49:15,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 23:49:15,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:15,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 23:49:15,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 23:49:15,331 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 39 states. [2020-12-22 23:49:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:15,444 INFO L93 Difference]: Finished difference Result 284 states and 350 transitions. [2020-12-22 23:49:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 23:49:15,445 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 117 [2020-12-22 23:49:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:15,446 INFO L225 Difference]: With dead ends: 284 [2020-12-22 23:49:15,446 INFO L226 Difference]: Without dead ends: 180 [2020-12-22 23:49:15,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 23:49:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-22 23:49:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-12-22 23:49:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 23:49:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 212 transitions. [2020-12-22 23:49:15,454 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 212 transitions. Word has length 117 [2020-12-22 23:49:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:15,454 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 212 transitions. [2020-12-22 23:49:15,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 23:49:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 212 transitions. [2020-12-22 23:49:15,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 23:49:15,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:15,455 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:15,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 23:49:15,669 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2102455291, now seen corresponding path program 29 times [2020-12-22 23:49:15,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:15,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841858195] [2020-12-22 23:49:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 23:49:16,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841858195] [2020-12-22 23:49:16,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217818463] [2020-12-22 23:49:16,422 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 23:49:19,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-22 23:49:19,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:19,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 23:49:19,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 23:49:19,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:19,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 23:49:19,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223491586] [2020-12-22 23:49:19,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 23:49:19,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:19,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 23:49:19,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:49:19,563 INFO L87 Difference]: Start difference. First operand 179 states and 212 transitions. Second operand 40 states. [2020-12-22 23:49:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:19,676 INFO L93 Difference]: Finished difference Result 286 states and 352 transitions. [2020-12-22 23:49:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 23:49:19,677 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 119 [2020-12-22 23:49:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:19,678 INFO L225 Difference]: With dead ends: 286 [2020-12-22 23:49:19,678 INFO L226 Difference]: Without dead ends: 182 [2020-12-22 23:49:19,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:49:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-22 23:49:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-12-22 23:49:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-22 23:49:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 214 transitions. [2020-12-22 23:49:19,686 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 214 transitions. Word has length 119 [2020-12-22 23:49:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:19,687 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 214 transitions. [2020-12-22 23:49:19,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 23:49:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 214 transitions. [2020-12-22 23:49:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 23:49:19,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:19,688 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:19,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 23:49:19,903 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:19,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash 2087562425, now seen corresponding path program 30 times [2020-12-22 23:49:19,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:19,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429437456] [2020-12-22 23:49:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 23:49:20,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429437456] [2020-12-22 23:49:20,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824932678] [2020-12-22 23:49:20,676 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 23:49:21,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-22 23:49:21,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:21,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:49:21,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 73 proven. 145 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2020-12-22 23:49:22,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:22,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 16] total 54 [2020-12-22 23:49:22,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461563756] [2020-12-22 23:49:22,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 23:49:22,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:22,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 23:49:22,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=940, Invalid=1922, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 23:49:22,255 INFO L87 Difference]: Start difference. First operand 181 states and 214 transitions. Second operand 54 states. [2020-12-22 23:49:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:24,244 INFO L93 Difference]: Finished difference Result 306 states and 380 transitions. [2020-12-22 23:49:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 23:49:24,245 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 121 [2020-12-22 23:49:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:24,249 INFO L225 Difference]: With dead ends: 306 [2020-12-22 23:49:24,249 INFO L226 Difference]: Without dead ends: 202 [2020-12-22 23:49:24,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2836, Invalid=8084, Unknown=0, NotChecked=0, Total=10920 [2020-12-22 23:49:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-22 23:49:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 191. [2020-12-22 23:49:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-22 23:49:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 226 transitions. [2020-12-22 23:49:24,260 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 226 transitions. Word has length 121 [2020-12-22 23:49:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:24,260 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 226 transitions. [2020-12-22 23:49:24,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 23:49:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 226 transitions. [2020-12-22 23:49:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 23:49:24,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:24,261 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:24,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 23:49:24,462 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:24,463 INFO L82 PathProgramCache]: Analyzing trace with hash 210884027, now seen corresponding path program 31 times [2020-12-22 23:49:24,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:24,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777665905] [2020-12-22 23:49:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 23:49:25,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777665905] [2020-12-22 23:49:25,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759997698] [2020-12-22 23:49:25,354 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 23:49:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:25,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 23:49:25,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 23:49:25,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:25,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 23:49:25,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282440358] [2020-12-22 23:49:25,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 23:49:25,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:25,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 23:49:25,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 23:49:25,598 INFO L87 Difference]: Start difference. First operand 191 states and 226 transitions. Second operand 43 states. [2020-12-22 23:49:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:25,749 INFO L93 Difference]: Finished difference Result 304 states and 374 transitions. [2020-12-22 23:49:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 23:49:25,750 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 128 [2020-12-22 23:49:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:25,751 INFO L225 Difference]: With dead ends: 304 [2020-12-22 23:49:25,752 INFO L226 Difference]: Without dead ends: 194 [2020-12-22 23:49:25,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 23:49:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-22 23:49:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2020-12-22 23:49:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-22 23:49:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 228 transitions. [2020-12-22 23:49:25,760 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 228 transitions. Word has length 128 [2020-12-22 23:49:25,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:25,760 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 228 transitions. [2020-12-22 23:49:25,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 23:49:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 228 transitions. [2020-12-22 23:49:25,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 23:49:25,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:25,761 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:25,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:25,975 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:25,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:25,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1336997187, now seen corresponding path program 32 times [2020-12-22 23:49:25,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:25,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686300235] [2020-12-22 23:49:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 23:49:26,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686300235] [2020-12-22 23:49:26,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704618412] [2020-12-22 23:49:26,918 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 23:49:27,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:27,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:27,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 23:49:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 23:49:27,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:27,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 23:49:27,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977579215] [2020-12-22 23:49:27,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 23:49:27,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:27,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 23:49:27,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:49:27,148 INFO L87 Difference]: Start difference. First operand 193 states and 228 transitions. Second operand 44 states. [2020-12-22 23:49:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:27,278 INFO L93 Difference]: Finished difference Result 306 states and 376 transitions. [2020-12-22 23:49:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 23:49:27,278 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 130 [2020-12-22 23:49:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:27,280 INFO L225 Difference]: With dead ends: 306 [2020-12-22 23:49:27,280 INFO L226 Difference]: Without dead ends: 196 [2020-12-22 23:49:27,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:49:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-22 23:49:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-12-22 23:49:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 23:49:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 230 transitions. [2020-12-22 23:49:27,288 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 230 transitions. Word has length 130 [2020-12-22 23:49:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:27,288 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 230 transitions. [2020-12-22 23:49:27,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 23:49:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 230 transitions. [2020-12-22 23:49:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 23:49:27,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:27,290 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:27,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:27,504 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1502807871, now seen corresponding path program 33 times [2020-12-22 23:49:27,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:27,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823011118] [2020-12-22 23:49:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 23:49:28,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823011118] [2020-12-22 23:49:28,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098457767] [2020-12-22 23:49:28,495 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 23:49:28,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 23:49:28,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:28,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 23:49:28,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 81 proven. 176 refuted. 0 times theorem prover too weak. 1602 trivial. 0 not checked. [2020-12-22 23:49:29,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:29,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 17] total 59 [2020-12-22 23:49:29,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713698225] [2020-12-22 23:49:29,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 23:49:29,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:29,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 23:49:29,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=2295, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 23:49:29,299 INFO L87 Difference]: Start difference. First operand 195 states and 230 transitions. Second operand 59 states. [2020-12-22 23:49:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:31,830 INFO L93 Difference]: Finished difference Result 326 states and 404 transitions. [2020-12-22 23:49:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 23:49:31,831 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2020-12-22 23:49:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:31,832 INFO L225 Difference]: With dead ends: 326 [2020-12-22 23:49:31,832 INFO L226 Difference]: Without dead ends: 216 [2020-12-22 23:49:31,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3399, Invalid=9711, Unknown=0, NotChecked=0, Total=13110 [2020-12-22 23:49:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-22 23:49:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 205. [2020-12-22 23:49:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-22 23:49:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 242 transitions. [2020-12-22 23:49:31,842 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 242 transitions. Word has length 132 [2020-12-22 23:49:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:31,842 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 242 transitions. [2020-12-22 23:49:31,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 23:49:31,843 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 242 transitions. [2020-12-22 23:49:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 23:49:31,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:31,844 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:32,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:32,058 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:32,059 INFO L82 PathProgramCache]: Analyzing trace with hash -154835987, now seen corresponding path program 34 times [2020-12-22 23:49:32,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:32,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929564725] [2020-12-22 23:49:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 23:49:33,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929564725] [2020-12-22 23:49:33,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710189862] [2020-12-22 23:49:33,015 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 23:49:33,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:33,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:33,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 23:49:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 23:49:33,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:33,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 23:49:33,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608504048] [2020-12-22 23:49:33,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 23:49:33,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:33,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 23:49:33,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:49:33,286 INFO L87 Difference]: Start difference. First operand 205 states and 242 transitions. Second operand 47 states. [2020-12-22 23:49:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:33,455 INFO L93 Difference]: Finished difference Result 324 states and 398 transitions. [2020-12-22 23:49:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 23:49:33,456 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-12-22 23:49:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:33,457 INFO L225 Difference]: With dead ends: 324 [2020-12-22 23:49:33,457 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 23:49:33,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:49:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 23:49:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-12-22 23:49:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-22 23:49:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 244 transitions. [2020-12-22 23:49:33,467 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 244 transitions. Word has length 139 [2020-12-22 23:49:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:33,468 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 244 transitions. [2020-12-22 23:49:33,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 23:49:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 244 transitions. [2020-12-22 23:49:33,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 23:49:33,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:33,469 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:33,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 23:49:33,684 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:33,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:33,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1636325803, now seen corresponding path program 35 times [2020-12-22 23:49:33,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:33,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064209343] [2020-12-22 23:49:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 23:49:34,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064209343] [2020-12-22 23:49:34,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238151462] [2020-12-22 23:49:34,870 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 23:50:15,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 45 check-sat command(s) [2020-12-22 23:50:15,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:15,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 23:50:15,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 23:50:15,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:15,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 23:50:15,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174695276] [2020-12-22 23:50:15,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 23:50:15,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:15,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 23:50:15,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 23:50:15,466 INFO L87 Difference]: Start difference. First operand 207 states and 244 transitions. Second operand 48 states. [2020-12-22 23:50:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:15,656 INFO L93 Difference]: Finished difference Result 326 states and 400 transitions. [2020-12-22 23:50:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 23:50:15,657 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 141 [2020-12-22 23:50:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:15,659 INFO L225 Difference]: With dead ends: 326 [2020-12-22 23:50:15,659 INFO L226 Difference]: Without dead ends: 210 [2020-12-22 23:50:15,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 23:50:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-22 23:50:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-12-22 23:50:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-22 23:50:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2020-12-22 23:50:15,668 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 141 [2020-12-22 23:50:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:15,668 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2020-12-22 23:50:15,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 23:50:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2020-12-22 23:50:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 23:50:15,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:15,669 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:15,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:15,883 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:15,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:15,883 INFO L82 PathProgramCache]: Analyzing trace with hash 660920297, now seen corresponding path program 36 times [2020-12-22 23:50:15,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:15,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552903909] [2020-12-22 23:50:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 23:50:17,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552903909] [2020-12-22 23:50:17,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81838736] [2020-12-22 23:50:17,118 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 23:50:18,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 23:50:18,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:18,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 23:50:18,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 89 proven. 210 refuted. 0 times theorem prover too weak. 1938 trivial. 0 not checked. [2020-12-22 23:50:19,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:19,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 18] total 64 [2020-12-22 23:50:19,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651149028] [2020-12-22 23:50:19,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 23:50:19,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:19,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 23:50:19,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=2701, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 23:50:19,064 INFO L87 Difference]: Start difference. First operand 209 states and 246 transitions. Second operand 64 states. [2020-12-22 23:50:22,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:22,215 INFO L93 Difference]: Finished difference Result 346 states and 428 transitions. [2020-12-22 23:50:22,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 23:50:22,215 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 143 [2020-12-22 23:50:22,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:22,217 INFO L225 Difference]: With dead ends: 346 [2020-12-22 23:50:22,217 INFO L226 Difference]: Without dead ends: 230 [2020-12-22 23:50:22,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4013, Invalid=11487, Unknown=0, NotChecked=0, Total=15500 [2020-12-22 23:50:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-22 23:50:22,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 219. [2020-12-22 23:50:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-22 23:50:22,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 258 transitions. [2020-12-22 23:50:22,228 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 258 transitions. Word has length 143 [2020-12-22 23:50:22,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:22,228 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 258 transitions. [2020-12-22 23:50:22,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 23:50:22,228 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 258 transitions. [2020-12-22 23:50:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 23:50:22,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:22,230 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:22,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:22,443 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:22,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1745919605, now seen corresponding path program 37 times [2020-12-22 23:50:22,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:22,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093079241] [2020-12-22 23:50:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-22 23:50:23,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093079241] [2020-12-22 23:50:23,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024443073] [2020-12-22 23:50:23,777 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 23:50:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 23:50:23,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-22 23:50:24,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:24,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 23:50:24,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746281865] [2020-12-22 23:50:24,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 23:50:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:24,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 23:50:24,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 23:50:24,025 INFO L87 Difference]: Start difference. First operand 219 states and 258 transitions. Second operand 51 states. [2020-12-22 23:50:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:24,233 INFO L93 Difference]: Finished difference Result 344 states and 422 transitions. [2020-12-22 23:50:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 23:50:24,233 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 150 [2020-12-22 23:50:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:24,234 INFO L225 Difference]: With dead ends: 344 [2020-12-22 23:50:24,234 INFO L226 Difference]: Without dead ends: 222 [2020-12-22 23:50:24,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 23:50:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-22 23:50:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2020-12-22 23:50:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-22 23:50:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 260 transitions. [2020-12-22 23:50:24,244 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 260 transitions. Word has length 150 [2020-12-22 23:50:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:24,245 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 260 transitions. [2020-12-22 23:50:24,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 23:50:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 260 transitions. [2020-12-22 23:50:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 23:50:24,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:24,246 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:24,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 23:50:24,460 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash -116782835, now seen corresponding path program 38 times [2020-12-22 23:50:24,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:24,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435942790] [2020-12-22 23:50:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-22 23:50:25,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435942790] [2020-12-22 23:50:25,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47761885] [2020-12-22 23:50:25,814 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 23:50:25,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:50:25,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:25,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 23:50:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-22 23:50:26,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:26,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 23:50:26,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479608692] [2020-12-22 23:50:26,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 23:50:26,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:26,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 23:50:26,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 23:50:26,065 INFO L87 Difference]: Start difference. First operand 221 states and 260 transitions. Second operand 52 states. [2020-12-22 23:50:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:26,255 INFO L93 Difference]: Finished difference Result 346 states and 424 transitions. [2020-12-22 23:50:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 23:50:26,256 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2020-12-22 23:50:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:26,257 INFO L225 Difference]: With dead ends: 346 [2020-12-22 23:50:26,258 INFO L226 Difference]: Without dead ends: 224 [2020-12-22 23:50:26,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 23:50:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-22 23:50:26,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2020-12-22 23:50:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-22 23:50:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 262 transitions. [2020-12-22 23:50:26,267 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 262 transitions. Word has length 152 [2020-12-22 23:50:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:26,268 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 262 transitions. [2020-12-22 23:50:26,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 23:50:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 262 transitions. [2020-12-22 23:50:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 23:50:26,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:26,269 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:26,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 23:50:26,484 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2115557391, now seen corresponding path program 39 times [2020-12-22 23:50:26,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:26,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623198591] [2020-12-22 23:50:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2650 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-22 23:50:27,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623198591] [2020-12-22 23:50:27,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807974517] [2020-12-22 23:50:27,884 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 23:50:28,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 23:50:28,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:28,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:50:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2650 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2020-12-22 23:50:28,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:28,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 17] total 67 [2020-12-22 23:50:28,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551497504] [2020-12-22 23:50:28,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 23:50:28,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:28,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 23:50:28,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=2975, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 23:50:28,803 INFO L87 Difference]: Start difference. First operand 223 states and 262 transitions. Second operand 67 states. [2020-12-22 23:50:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:31,886 INFO L93 Difference]: Finished difference Result 365 states and 450 transitions. [2020-12-22 23:50:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 23:50:31,887 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 154 [2020-12-22 23:50:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:31,888 INFO L225 Difference]: With dead ends: 365 [2020-12-22 23:50:31,888 INFO L226 Difference]: Without dead ends: 243 [2020-12-22 23:50:31,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4335, Invalid=12695, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 23:50:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-22 23:50:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 231. [2020-12-22 23:50:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-22 23:50:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 272 transitions. [2020-12-22 23:50:31,899 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 272 transitions. Word has length 154 [2020-12-22 23:50:31,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:31,899 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 272 transitions. [2020-12-22 23:50:31,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 23:50:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 272 transitions. [2020-12-22 23:50:31,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 23:50:31,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:31,900 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:32,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 23:50:32,115 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:32,116 INFO L82 PathProgramCache]: Analyzing trace with hash -272658081, now seen corresponding path program 40 times [2020-12-22 23:50:32,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:32,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192996973] [2020-12-22 23:50:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2789 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:50:33,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192996973] [2020-12-22 23:50:33,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079523243] [2020-12-22 23:50:33,513 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 23:50:33,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:50:33,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:33,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 23:50:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2789 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:50:33,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:33,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 23:50:33,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86767565] [2020-12-22 23:50:33,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 23:50:33,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:33,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 23:50:33,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 23:50:33,791 INFO L87 Difference]: Start difference. First operand 231 states and 272 transitions. Second operand 54 states. [2020-12-22 23:50:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:33,971 INFO L93 Difference]: Finished difference Result 362 states and 444 transitions. [2020-12-22 23:50:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 23:50:33,972 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 159 [2020-12-22 23:50:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:33,973 INFO L225 Difference]: With dead ends: 362 [2020-12-22 23:50:33,973 INFO L226 Difference]: Without dead ends: 234 [2020-12-22 23:50:33,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 23:50:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-22 23:50:33,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2020-12-22 23:50:33,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-22 23:50:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 274 transitions. [2020-12-22 23:50:33,982 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 274 transitions. Word has length 159 [2020-12-22 23:50:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:33,983 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 274 transitions. [2020-12-22 23:50:33,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 23:50:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 274 transitions. [2020-12-22 23:50:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 23:50:33,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:33,984 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:34,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:34,198 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:34,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:34,199 INFO L82 PathProgramCache]: Analyzing trace with hash 570178589, now seen corresponding path program 41 times [2020-12-22 23:50:34,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:34,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280563190] [2020-12-22 23:50:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2890 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:50:35,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280563190] [2020-12-22 23:50:35,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531808152] [2020-12-22 23:50:35,674 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 23:52:33,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2020-12-22 23:52:33,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:33,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 23:52:33,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2890 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:52:33,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:33,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 23:52:33,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99281064] [2020-12-22 23:52:33,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 23:52:33,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:33,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 23:52:33,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 23:52:33,480 INFO L87 Difference]: Start difference. First operand 233 states and 274 transitions. Second operand 55 states. [2020-12-22 23:52:33,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:33,699 INFO L93 Difference]: Finished difference Result 364 states and 446 transitions. [2020-12-22 23:52:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 23:52:33,700 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2020-12-22 23:52:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:33,701 INFO L225 Difference]: With dead ends: 364 [2020-12-22 23:52:33,701 INFO L226 Difference]: Without dead ends: 236 [2020-12-22 23:52:33,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 23:52:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-22 23:52:33,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2020-12-22 23:52:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-22 23:52:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 276 transitions. [2020-12-22 23:52:33,710 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 276 transitions. Word has length 161 [2020-12-22 23:52:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:33,710 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 276 transitions. [2020-12-22 23:52:33,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 23:52:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 276 transitions. [2020-12-22 23:52:33,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 23:52:33,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:33,712 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:33,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:33,926 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:33,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1212600485, now seen corresponding path program 42 times [2020-12-22 23:52:33,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:33,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650376144] [2020-12-22 23:52:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:52:35,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650376144] [2020-12-22 23:52:35,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281662615] [2020-12-22 23:52:35,537 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 23:52:40,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-22 23:52:40,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:40,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:52:40,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 103 proven. 287 refuted. 0 times theorem prover too weak. 2603 trivial. 0 not checked. [2020-12-22 23:52:41,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:41,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 20] total 73 [2020-12-22 23:52:41,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345240956] [2020-12-22 23:52:41,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-22 23:52:41,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:41,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-22 23:52:41,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1733, Invalid=3523, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 23:52:41,053 INFO L87 Difference]: Start difference. First operand 235 states and 276 transitions. Second operand 73 states. [2020-12-22 23:52:45,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:45,043 INFO L93 Difference]: Finished difference Result 384 states and 474 transitions. [2020-12-22 23:52:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-22 23:52:45,044 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 163 [2020-12-22 23:52:45,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:45,046 INFO L225 Difference]: With dead ends: 384 [2020-12-22 23:52:45,046 INFO L226 Difference]: Without dead ends: 256 [2020-12-22 23:52:45,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3264 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5223, Invalid=15083, Unknown=0, NotChecked=0, Total=20306 [2020-12-22 23:52:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-22 23:52:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 245. [2020-12-22 23:52:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-12-22 23:52:45,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 288 transitions. [2020-12-22 23:52:45,057 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 288 transitions. Word has length 163 [2020-12-22 23:52:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:45,057 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 288 transitions. [2020-12-22 23:52:45,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-22 23:52:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 288 transitions. [2020-12-22 23:52:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 23:52:45,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:45,059 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:45,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 23:52:45,273 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:45,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:45,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1617030439, now seen corresponding path program 43 times [2020-12-22 23:52:45,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:45,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697125775] [2020-12-22 23:52:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3248 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-22 23:52:47,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697125775] [2020-12-22 23:52:47,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711630206] [2020-12-22 23:52:47,076 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 23:52:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 23:52:47,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3248 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-22 23:52:47,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:47,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-22 23:52:47,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980639207] [2020-12-22 23:52:47,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 23:52:47,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:47,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 23:52:47,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 23:52:47,379 INFO L87 Difference]: Start difference. First operand 245 states and 288 transitions. Second operand 58 states. [2020-12-22 23:52:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:47,643 INFO L93 Difference]: Finished difference Result 382 states and 468 transitions. [2020-12-22 23:52:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 23:52:47,644 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2020-12-22 23:52:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:47,645 INFO L225 Difference]: With dead ends: 382 [2020-12-22 23:52:47,646 INFO L226 Difference]: Without dead ends: 248 [2020-12-22 23:52:47,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 23:52:47,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-22 23:52:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2020-12-22 23:52:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-22 23:52:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 290 transitions. [2020-12-22 23:52:47,656 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 290 transitions. Word has length 170 [2020-12-22 23:52:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:47,656 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 290 transitions. [2020-12-22 23:52:47,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 23:52:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 290 transitions. [2020-12-22 23:52:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 23:52:47,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:47,658 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:47,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:47,873 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:47,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1651776165, now seen corresponding path program 44 times [2020-12-22 23:52:47,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:47,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726106621] [2020-12-22 23:52:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3357 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-22 23:52:49,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726106621] [2020-12-22 23:52:49,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558791721] [2020-12-22 23:52:49,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:52:49,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:52:49,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:49,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 23:52:49,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3357 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-22 23:52:50,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:50,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-22 23:52:50,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952582817] [2020-12-22 23:52:50,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 23:52:50,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:50,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 23:52:50,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 23:52:50,107 INFO L87 Difference]: Start difference. First operand 247 states and 290 transitions. Second operand 59 states. [2020-12-22 23:52:50,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:50,369 INFO L93 Difference]: Finished difference Result 384 states and 470 transitions. [2020-12-22 23:52:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 23:52:50,371 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 172 [2020-12-22 23:52:50,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:50,382 INFO L225 Difference]: With dead ends: 384 [2020-12-22 23:52:50,382 INFO L226 Difference]: Without dead ends: 250 [2020-12-22 23:52:50,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 23:52:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-22 23:52:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2020-12-22 23:52:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-22 23:52:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 292 transitions. [2020-12-22 23:52:50,393 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 292 transitions. Word has length 172 [2020-12-22 23:52:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:50,393 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 292 transitions. [2020-12-22 23:52:50,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 23:52:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 292 transitions. [2020-12-22 23:52:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-22 23:52:50,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:50,395 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:50,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 23:52:50,609 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:50,610 INFO L82 PathProgramCache]: Analyzing trace with hash -682680483, now seen corresponding path program 45 times [2020-12-22 23:52:50,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:50,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372107250] [2020-12-22 23:52:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat