/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_bubblesort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:48:25,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:48:25,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:48:25,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:48:25,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:48:25,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:48:25,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:48:25,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:48:25,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:48:25,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:48:25,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:48:25,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:48:25,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:48:25,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:48:25,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:48:25,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:48:25,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:48:25,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:48:25,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:48:25,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:48:25,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:48:25,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:48:25,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:48:25,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:48:25,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 23:48:25,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 23:48:25,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 23:48:25,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 23:48:25,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 23:48:25,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 23:48:25,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 23:48:25,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 23:48:25,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 23:48:25,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 23:48:25,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 23:48:25,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 23:48:25,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 23:48:25,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 23:48:25,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:48:25,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:48:25,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:48:25,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:48:25,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:48:25,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:48:25,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:48:25,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:48:25,593 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:48:25,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:48:25,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:48:25,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:48:25,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:48:25,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:48:25,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:48:25,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:48:25,595 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:48:25,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:48:25,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:48:25,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:48:25,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:48:25,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:48:25,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:48:25,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:48:25,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:48:25,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:48:25,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:48:25,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:48:25,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:48:25,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:48:26,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:48:26,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:48:26,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:48:26,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:48:26,091 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:48:26,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2020-12-22 23:48:26,192 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c57667eb2/6b8d5bb8907349a98dab8f10dcc7cbf3/FLAG39dd09510 [2020-12-22 23:48:26,792 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:48:26,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2020-12-22 23:48:26,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c57667eb2/6b8d5bb8907349a98dab8f10dcc7cbf3/FLAG39dd09510 [2020-12-22 23:48:27,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c57667eb2/6b8d5bb8907349a98dab8f10dcc7cbf3 [2020-12-22 23:48:27,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:48:27,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:48:27,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:27,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:48:27,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:48:27,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32cc801f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27, skipping insertion in model container [2020-12-22 23:48:27,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:48:27,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:48:27,412 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_bubblesort_2_ground.i[820,833] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[BinaryExpression[ARITHMINUS,IdentifierExpression[~i~0,],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-22 23:48:27,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,448 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:48:27,463 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_bubblesort_2_ground.i[820,833] 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[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,IdentifierExpression[~i~0,],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-22 23:48:27,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,492 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:48:27,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27 WrapperNode [2020-12-22 23:48:27,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:27,495 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:48:27,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:48:27,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:48:27,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:48:27,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:48:27,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:48:27,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:48:27,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:48:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:48:27,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:48:27,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:48:27,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:48:27,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:48:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:48:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:48:28,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:48:28,012 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 23:48:28,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:28 BoogieIcfgContainer [2020-12-22 23:48:28,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:48:28,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:48:28,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:48:28,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:48:28,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:48:27" (1/3) ... [2020-12-22 23:48:28,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3250f322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:28, skipping insertion in model container [2020-12-22 23:48:28,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (2/3) ... [2020-12-22 23:48:28,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3250f322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:28, skipping insertion in model container [2020-12-22 23:48:28,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:28" (3/3) ... [2020-12-22 23:48:28,052 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2020-12-22 23:48:28,071 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:48:28,084 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:48:28,120 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:48:28,155 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:48:28,155 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:48:28,155 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:48:28,155 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:48:28,156 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:48:28,156 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:48:28,156 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:48:28,156 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:48:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-22 23:48:28,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 23:48:28,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,184 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2020-12-22 23:48:28,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288044655] [2020-12-22 23:48:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:28,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288044655] [2020-12-22 23:48:28,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:28,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:48:28,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512192833] [2020-12-22 23:48:28,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:28,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:28,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:28,507 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-12-22 23:48:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,542 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2020-12-22 23:48:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:28,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 23:48:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,555 INFO L225 Difference]: With dead ends: 42 [2020-12-22 23:48:28,555 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 23:48:28,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 23:48:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 23:48:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 23:48:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-22 23:48:28,600 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-12-22 23:48:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,600 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-22 23:48:28,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-22 23:48:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 23:48:28,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:48:28,602 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2020-12-22 23:48:28,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062200097] [2020-12-22 23:48:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:28,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062200097] [2020-12-22 23:48:28,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313875709] [2020-12-22 23:48:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:48:28,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:28,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:28,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:48:28,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351635678] [2020-12-22 23:48:28,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:28,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:28,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:28,763 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2020-12-22 23:48:28,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,777 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2020-12-22 23:48:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:28,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 23:48:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,779 INFO L225 Difference]: With dead ends: 32 [2020-12-22 23:48:28,779 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 23:48:28,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 23:48:28,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 23:48:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 23:48:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2020-12-22 23:48:28,787 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2020-12-22 23:48:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,787 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-12-22 23:48:28,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2020-12-22 23:48:28,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 23:48:28,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:48:29,004 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2020-12-22 23:48:29,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673543679] [2020-12-22 23:48:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:29,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673543679] [2020-12-22 23:48:29,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039938254] [2020-12-22 23:48:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:48:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:29,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:29,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:48:29,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150835801] [2020-12-22 23:48:29,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:29,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:29,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:29,195 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 3 states. [2020-12-22 23:48:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,236 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2020-12-22 23:48:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:29,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-22 23:48:29,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,238 INFO L225 Difference]: With dead ends: 44 [2020-12-22 23:48:29,239 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 23:48:29,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 23:48:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-22 23:48:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 23:48:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-12-22 23:48:29,247 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2020-12-22 23:48:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,248 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-12-22 23:48:29,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-12-22 23:48:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 23:48:29,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:29,468 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2020-12-22 23:48:29,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238874072] [2020-12-22 23:48:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:48:29,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238874072] [2020-12-22 23:48:29,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436317055] [2020-12-22 23:48:29,512 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 23:48:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:48:29,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:48:29,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:29,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:48:29,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928527392] [2020-12-22 23:48:29,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:29,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:29,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:29,650 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2020-12-22 23:48:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,678 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-12-22 23:48:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:29,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-22 23:48:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,680 INFO L225 Difference]: With dead ends: 46 [2020-12-22 23:48:29,680 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 23:48:29,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 23:48:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-22 23:48:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 23:48:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-12-22 23:48:29,687 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2020-12-22 23:48:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,688 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-12-22 23:48:29,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-22 23:48:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 23:48:29,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:29,904 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,906 INFO L82 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2020-12-22 23:48:29,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900106181] [2020-12-22 23:48:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:48:29,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900106181] [2020-12-22 23:48:29,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851850888] [2020-12-22 23:48:29,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:30,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:30,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:30,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:48:30,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:48:30,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:30,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 23:48:30,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231549966] [2020-12-22 23:48:30,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:48:30,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:48:30,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:30,087 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2020-12-22 23:48:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,133 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2020-12-22 23:48:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:48:30,133 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 23:48:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,134 INFO L225 Difference]: With dead ends: 57 [2020-12-22 23:48:30,135 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 23:48:30,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:30,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 23:48:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-12-22 23:48:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 23:48:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-12-22 23:48:30,142 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 19 [2020-12-22 23:48:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,142 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-12-22 23:48:30,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:48:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-12-22 23:48:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 23:48:30,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,144 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:30,359 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,360 INFO L82 PathProgramCache]: Analyzing trace with hash -201702437, now seen corresponding path program 3 times [2020-12-22 23:48:30,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477511012] [2020-12-22 23:48:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:48:30,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477511012] [2020-12-22 23:48:30,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240585240] [2020-12-22 23:48:30,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:30,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 23:48:30,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:30,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:30,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 23:48:30,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:30,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2020-12-22 23:48:30,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156379919] [2020-12-22 23:48:30,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:48:30,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:48:30,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:30,593 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 9 states. [2020-12-22 23:48:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,648 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2020-12-22 23:48:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:48:30,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-12-22 23:48:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,649 INFO L225 Difference]: With dead ends: 70 [2020-12-22 23:48:30,650 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 23:48:30,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 23:48:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-12-22 23:48:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 23:48:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-12-22 23:48:30,657 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2020-12-22 23:48:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,657 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-12-22 23:48:30,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:48:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-12-22 23:48:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 23:48:30,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,659 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 23:48:30,873 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1255714277, now seen corresponding path program 4 times [2020-12-22 23:48:30,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043109219] [2020-12-22 23:48:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:48:30,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043109219] [2020-12-22 23:48:30,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644091017] [2020-12-22 23:48:30,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:31,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:31,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:31,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:48:31,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:31,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 23:48:31,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129041483] [2020-12-22 23:48:31,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:48:31,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:48:31,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:48:31,112 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 8 states. [2020-12-22 23:48:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,135 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-12-22 23:48:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:48:31,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-12-22 23:48:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,136 INFO L225 Difference]: With dead ends: 74 [2020-12-22 23:48:31,137 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 23:48:31,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:48:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 23:48:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-22 23:48:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 23:48:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-12-22 23:48:31,143 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 29 [2020-12-22 23:48:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,143 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-12-22 23:48:31,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:48:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-12-22 23:48:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 23:48:31,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,144 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:31,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,359 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,360 INFO L82 PathProgramCache]: Analyzing trace with hash -654389213, now seen corresponding path program 5 times [2020-12-22 23:48:31,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123576989] [2020-12-22 23:48:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:48:31,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123576989] [2020-12-22 23:48:31,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205760221] [2020-12-22 23:48:31,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 23:48:31,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:31,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:31,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 23:48:31,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:31,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-22 23:48:31,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573638431] [2020-12-22 23:48:31,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:48:31,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:48:31,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:31,581 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 12 states. [2020-12-22 23:48:31,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,655 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-12-22 23:48:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:48:31,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-12-22 23:48:31,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,660 INFO L225 Difference]: With dead ends: 86 [2020-12-22 23:48:31,660 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 23:48:31,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 23:48:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-12-22 23:48:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 23:48:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-12-22 23:48:31,682 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 31 [2020-12-22 23:48:31,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,683 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-12-22 23:48:31,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:48:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-12-22 23:48:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 23:48:31,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,688 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:31,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,890 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,892 INFO L82 PathProgramCache]: Analyzing trace with hash -568371359, now seen corresponding path program 6 times [2020-12-22 23:48:31,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818884663] [2020-12-22 23:48:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-22 23:48:31,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818884663] [2020-12-22 23:48:31,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202313275] [2020-12-22 23:48:31,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:32,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 23:48:32,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:32,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:32,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:32,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:32,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-22 23:48:32,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329850885] [2020-12-22 23:48:32,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:32,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:32,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:32,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:32,129 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 14 states. [2020-12-22 23:48:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:32,193 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2020-12-22 23:48:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:48:32,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-22 23:48:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:32,195 INFO L225 Difference]: With dead ends: 100 [2020-12-22 23:48:32,195 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 23:48:32,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 23:48:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-12-22 23:48:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 23:48:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-12-22 23:48:32,202 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 36 [2020-12-22 23:48:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:32,202 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-12-22 23:48:32,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-12-22 23:48:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 23:48:32,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:32,204 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:32,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 23:48:32,418 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1072367713, now seen corresponding path program 7 times [2020-12-22 23:48:32,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:32,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910609150] [2020-12-22 23:48:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:32,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910609150] [2020-12-22 23:48:32,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936833776] [2020-12-22 23:48:32,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:32,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:32,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:32,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:48:32,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682918713] [2020-12-22 23:48:32,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:48:32,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:32,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:48:32,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:32,669 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 11 states. [2020-12-22 23:48:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:32,711 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-12-22 23:48:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:48:32,712 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-22 23:48:32,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:32,713 INFO L225 Difference]: With dead ends: 104 [2020-12-22 23:48:32,713 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 23:48:32,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 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 23:48:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 23:48:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 23:48:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 23:48:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-12-22 23:48:32,729 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 41 [2020-12-22 23:48:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:32,729 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-12-22 23:48:32,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:48:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-12-22 23:48:32,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 23:48:32,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:32,734 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:32,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:32,949 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1876143325, now seen corresponding path program 8 times [2020-12-22 23:48:32,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:32,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602279367] [2020-12-22 23:48:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:33,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602279367] [2020-12-22 23:48:33,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626223987] [2020-12-22 23:48:33,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:33,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:33,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:33,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:48:33,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:33,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:33,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:48:33,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286436053] [2020-12-22 23:48:33,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:48:33,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:33,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:48:33,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:33,150 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 12 states. [2020-12-22 23:48:33,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:33,182 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-12-22 23:48:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:48:33,183 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-12-22 23:48:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:33,184 INFO L225 Difference]: With dead ends: 106 [2020-12-22 23:48:33,184 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 23:48:33,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:33,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 23:48:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-22 23:48:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 23:48:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-12-22 23:48:33,190 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 43 [2020-12-22 23:48:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:33,190 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-12-22 23:48:33,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:48:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-12-22 23:48:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 23:48:33,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:33,191 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:33,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:33,406 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:33,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:33,407 INFO L82 PathProgramCache]: Analyzing trace with hash 716835483, now seen corresponding path program 9 times [2020-12-22 23:48:33,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:33,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492896385] [2020-12-22 23:48:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:33,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492896385] [2020-12-22 23:48:33,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728996782] [2020-12-22 23:48:33,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:33,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 23:48:33,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:33,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:48:33,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 23:48:33,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:33,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-22 23:48:33,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471435547] [2020-12-22 23:48:33,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:48:33,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:33,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:48:33,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:33,721 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 18 states. [2020-12-22 23:48:33,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:33,805 INFO L93 Difference]: Finished difference Result 118 states and 152 transitions. [2020-12-22 23:48:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:48:33,805 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-12-22 23:48:33,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:33,806 INFO L225 Difference]: With dead ends: 118 [2020-12-22 23:48:33,807 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 23:48:33,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:33,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 23:48:33,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-12-22 23:48:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 23:48:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-12-22 23:48:33,813 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 45 [2020-12-22 23:48:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:33,813 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-12-22 23:48:33,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:48:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-12-22 23:48:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 23:48:33,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:33,814 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:48:34,030 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 10 times [2020-12-22 23:48:34,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790400974] [2020-12-22 23:48:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-22 23:48:34,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790400974] [2020-12-22 23:48:34,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501637836] [2020-12-22 23:48:34,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:34,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:34,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:34,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:48:34,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-22 23:48:34,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:34,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 23:48:34,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71431967] [2020-12-22 23:48:34,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:34,286 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 14 states. [2020-12-22 23:48:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,329 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2020-12-22 23:48:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:48:34,330 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-12-22 23:48:34,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,331 INFO L225 Difference]: With dead ends: 122 [2020-12-22 23:48:34,331 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 23:48:34,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 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 23:48:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 23:48:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-22 23:48:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 23:48:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-12-22 23:48:34,336 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 50 [2020-12-22 23:48:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,337 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-12-22 23:48:34,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-12-22 23:48:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 23:48:34,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,338 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 23:48:34,554 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1720209685, now seen corresponding path program 11 times [2020-12-22 23:48:34,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459997090] [2020-12-22 23:48:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-22 23:48:34,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459997090] [2020-12-22 23:48:34,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431155353] [2020-12-22 23:48:34,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:34,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-22 23:48:34,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:34,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:48:34,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 23:48:35,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:35,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2020-12-22 23:48:35,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067900731] [2020-12-22 23:48:35,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:48:35,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:48:35,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:48:35,014 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 21 states. [2020-12-22 23:48:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,120 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-12-22 23:48:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:48:35,121 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-12-22 23:48:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,122 INFO L225 Difference]: With dead ends: 134 [2020-12-22 23:48:35,122 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 23:48:35,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:48:35,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 23:48:35,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2020-12-22 23:48:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 23:48:35,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2020-12-22 23:48:35,128 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 52 [2020-12-22 23:48:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:35,129 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2020-12-22 23:48:35,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:48:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2020-12-22 23:48:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 23:48:35,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:35,130 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:35,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 23:48:35,344 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:35,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:35,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2017640405, now seen corresponding path program 12 times [2020-12-22 23:48:35,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:35,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664539269] [2020-12-22 23:48:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-22 23:48:35,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664539269] [2020-12-22 23:48:35,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292586906] [2020-12-22 23:48:35,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:35,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 23:48:35,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:35,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:48:35,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-22 23:48:35,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:35,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 23:48:35,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743813774] [2020-12-22 23:48:35,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 23:48:35,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 23:48:35,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:48:35,811 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand 16 states. [2020-12-22 23:48:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,862 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2020-12-22 23:48:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 23:48:35,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-12-22 23:48:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,863 INFO L225 Difference]: With dead ends: 138 [2020-12-22 23:48:35,864 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 23:48:35,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 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 23:48:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 23:48:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-22 23:48:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 23:48:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-12-22 23:48:35,874 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 57 [2020-12-22 23:48:35,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:35,876 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-12-22 23:48:35,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 23:48:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-12-22 23:48:35,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 23:48:35,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:35,877 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:36,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,092 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1894041325, now seen corresponding path program 13 times [2020-12-22 23:48:36,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82573628] [2020-12-22 23:48:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-22 23:48:36,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82573628] [2020-12-22 23:48:36,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129475237] [2020-12-22 23:48:36,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-22 23:48:36,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:36,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 23:48:36,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689036503] [2020-12-22 23:48:36,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:48:36,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:36,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:48:36,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:36,378 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 17 states. [2020-12-22 23:48:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,423 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2020-12-22 23:48:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:48:36,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-12-22 23:48:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,424 INFO L225 Difference]: With dead ends: 140 [2020-12-22 23:48:36,425 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 23:48:36,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:36,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 23:48:36,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-22 23:48:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 23:48:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2020-12-22 23:48:36,429 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 59 [2020-12-22 23:48:36,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,430 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2020-12-22 23:48:36,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:48:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2020-12-22 23:48:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 23:48:36,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,431 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:36,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 23:48:36,647 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1371167441, now seen corresponding path program 14 times [2020-12-22 23:48:36,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373847456] [2020-12-22 23:48:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-22 23:48:36,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373847456] [2020-12-22 23:48:36,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527421897] [2020-12-22 23:48:36,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:36,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:36,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-22 23:48:36,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:36,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 23:48:36,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128607807] [2020-12-22 23:48:36,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:48:36,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:36,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:48:36,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:36,987 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 18 states. [2020-12-22 23:48:37,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:37,035 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2020-12-22 23:48:37,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:48:37,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-12-22 23:48:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:37,037 INFO L225 Difference]: With dead ends: 142 [2020-12-22 23:48:37,037 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 23:48:37,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 23:48:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-22 23:48:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 23:48:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2020-12-22 23:48:37,042 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 61 [2020-12-22 23:48:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:37,042 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2020-12-22 23:48:37,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:48:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2020-12-22 23:48:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 23:48:37,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:37,043 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:37,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:48:37,258 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:37,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash -384301809, now seen corresponding path program 15 times [2020-12-22 23:48:37,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:37,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999632706] [2020-12-22 23:48:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-22 23:48:37,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999632706] [2020-12-22 23:48:37,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069395328] [2020-12-22 23:48:37,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:37,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 23:48:37,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:37,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:37,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-22 23:48:37,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:37,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2020-12-22 23:48:37,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848422157] [2020-12-22 23:48:37,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:48:37,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:37,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:48:37,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:37,712 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand 26 states. [2020-12-22 23:48:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:37,833 INFO L93 Difference]: Finished difference Result 154 states and 196 transitions. [2020-12-22 23:48:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 23:48:37,834 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-12-22 23:48:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:37,835 INFO L225 Difference]: With dead ends: 154 [2020-12-22 23:48:37,835 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 23:48:37,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 23:48:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2020-12-22 23:48:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 23:48:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2020-12-22 23:48:37,841 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 63 [2020-12-22 23:48:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:37,841 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2020-12-22 23:48:37,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:48:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2020-12-22 23:48:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 23:48:37,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:37,842 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:38,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 23:48:38,056 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2008179445, now seen corresponding path program 16 times [2020-12-22 23:48:38,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:38,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483368974] [2020-12-22 23:48:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-22 23:48:38,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483368974] [2020-12-22 23:48:38,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868983842] [2020-12-22 23:48:38,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:38,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:38,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:38,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:48:38,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-22 23:48:38,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:38,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 23:48:38,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792501254] [2020-12-22 23:48:38,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:48:38,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:38,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:48:38,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:38,406 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 20 states. [2020-12-22 23:48:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:38,467 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2020-12-22 23:48:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:48:38,468 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2020-12-22 23:48:38,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:38,468 INFO L225 Difference]: With dead ends: 158 [2020-12-22 23:48:38,469 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 23:48:38,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 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 23:48:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 23:48:38,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-22 23:48:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 23:48:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-12-22 23:48:38,473 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 68 [2020-12-22 23:48:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:38,473 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-12-22 23:48:38,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:48:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2020-12-22 23:48:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 23:48:38,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:38,474 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:38,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:38,688 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:38,689 INFO L82 PathProgramCache]: Analyzing trace with hash -32876809, now seen corresponding path program 17 times [2020-12-22 23:48:38,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:38,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088384069] [2020-12-22 23:48:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-22 23:48:38,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088384069] [2020-12-22 23:48:38,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387847708] [2020-12-22 23:48:38,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:39,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-22 23:48:39,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:48:39,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-22 23:48:39,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:39,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2020-12-22 23:48:39,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733336883] [2020-12-22 23:48:39,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:48:39,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:39,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:48:39,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:39,259 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 29 states. [2020-12-22 23:48:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:39,406 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2020-12-22 23:48:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:48:39,406 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2020-12-22 23:48:39,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:39,407 INFO L225 Difference]: With dead ends: 170 [2020-12-22 23:48:39,407 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 23:48:39,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 23:48:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2020-12-22 23:48:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 23:48:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2020-12-22 23:48:39,412 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 70 [2020-12-22 23:48:39,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:39,412 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2020-12-22 23:48:39,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:48:39,412 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2020-12-22 23:48:39,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 23:48:39,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:39,413 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:39,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:39,627 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:39,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1211963593, now seen corresponding path program 18 times [2020-12-22 23:48:39,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:39,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218476171] [2020-12-22 23:48:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-12-22 23:48:39,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218476171] [2020-12-22 23:48:39,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104314353] [2020-12-22 23:48:39,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:40,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 23:48:40,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:40,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:48:40,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-22 23:48:40,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:40,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2020-12-22 23:48:40,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179409093] [2020-12-22 23:48:40,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 23:48:40,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:40,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 23:48:40,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:48:40,693 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 31 states. [2020-12-22 23:48:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:40,881 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2020-12-22 23:48:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 23:48:40,882 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2020-12-22 23:48:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:40,883 INFO L225 Difference]: With dead ends: 184 [2020-12-22 23:48:40,883 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 23:48:40,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:48:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 23:48:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-12-22 23:48:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 23:48:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2020-12-22 23:48:40,890 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 75 [2020-12-22 23:48:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:40,891 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2020-12-22 23:48:40,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 23:48:40,891 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2020-12-22 23:48:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 23:48:40,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:40,892 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:41,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 23:48:41,100 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:41,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2135143941, now seen corresponding path program 19 times [2020-12-22 23:48:41,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:41,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851939846] [2020-12-22 23:48:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-22 23:48:41,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851939846] [2020-12-22 23:48:41,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578775942] [2020-12-22 23:48:41,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:41,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 23:48:41,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-22 23:48:41,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:41,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 23:48:41,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281402826] [2020-12-22 23:48:41,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 23:48:41,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:41,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 23:48:41,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:48:41,534 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand 23 states. [2020-12-22 23:48:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:41,608 INFO L93 Difference]: Finished difference Result 188 states and 236 transitions. [2020-12-22 23:48:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:48:41,608 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 80 [2020-12-22 23:48:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:41,609 INFO L225 Difference]: With dead ends: 188 [2020-12-22 23:48:41,609 INFO L226 Difference]: Without dead ends: 116 [2020-12-22 23:48:41,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:48:41,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-22 23:48:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-22 23:48:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 23:48:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2020-12-22 23:48:41,617 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 80 [2020-12-22 23:48:41,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:41,617 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2020-12-22 23:48:41,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 23:48:41,617 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2020-12-22 23:48:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 23:48:41,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:41,619 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:41,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:48:41,832 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:41,833 INFO L82 PathProgramCache]: Analyzing trace with hash -70497539, now seen corresponding path program 20 times [2020-12-22 23:48:41,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:41,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104794350] [2020-12-22 23:48:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-22 23:48:42,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104794350] [2020-12-22 23:48:42,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954068972] [2020-12-22 23:48:42,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:42,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:42,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:42,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 23:48:42,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-22 23:48:42,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:42,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 23:48:42,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298077725] [2020-12-22 23:48:42,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:48:42,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:48:42,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:48:42,280 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand 24 states. [2020-12-22 23:48:42,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:42,344 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2020-12-22 23:48:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:48:42,345 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-12-22 23:48:42,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:42,346 INFO L225 Difference]: With dead ends: 190 [2020-12-22 23:48:42,346 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 23:48:42,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:48:42,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 23:48:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-22 23:48:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 23:48:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2020-12-22 23:48:42,351 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 82 [2020-12-22 23:48:42,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:42,352 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2020-12-22 23:48:42,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:48:42,352 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2020-12-22 23:48:42,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 23:48:42,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:42,354 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:42,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:42,568 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash -220195969, now seen corresponding path program 21 times [2020-12-22 23:48:42,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:42,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243968739] [2020-12-22 23:48:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-22 23:48:42,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243968739] [2020-12-22 23:48:42,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752242334] [2020-12-22 23:48:42,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:43,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 23:48:43,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:43,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:48:43,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-22 23:48:43,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:43,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2020-12-22 23:48:43,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350990520] [2020-12-22 23:48:43,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 23:48:43,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:43,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 23:48:43,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:48:43,417 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 35 states. [2020-12-22 23:48:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:43,560 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2020-12-22 23:48:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 23:48:43,560 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-12-22 23:48:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:43,562 INFO L225 Difference]: With dead ends: 202 [2020-12-22 23:48:43,562 INFO L226 Difference]: Without dead ends: 130 [2020-12-22 23:48:43,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:48:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-22 23:48:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2020-12-22 23:48:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 23:48:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2020-12-22 23:48:43,568 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 84 [2020-12-22 23:48:43,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:43,569 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2020-12-22 23:48:43,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 23:48:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2020-12-22 23:48:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 23:48:43,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:43,570 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:43,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 23:48:43,784 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:43,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:43,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1727048385, now seen corresponding path program 22 times [2020-12-22 23:48:43,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:43,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939744149] [2020-12-22 23:48:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-22 23:48:44,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939744149] [2020-12-22 23:48:44,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066106638] [2020-12-22 23:48:44,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:44,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:44,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:44,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:48:44,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-22 23:48:44,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:44,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 23:48:44,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799452978] [2020-12-22 23:48:44,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:48:44,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:44,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:48:44,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:44,250 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand 26 states. [2020-12-22 23:48:44,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:44,315 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2020-12-22 23:48:44,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 23:48:44,316 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 89 [2020-12-22 23:48:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:44,317 INFO L225 Difference]: With dead ends: 206 [2020-12-22 23:48:44,317 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 23:48:44,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 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 23:48:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 23:48:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-22 23:48:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 23:48:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2020-12-22 23:48:44,323 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 89 [2020-12-22 23:48:44,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:44,323 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2020-12-22 23:48:44,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:48:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2020-12-22 23:48:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 23:48:44,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:44,325 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:44,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:44,539 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1880839169, now seen corresponding path program 23 times [2020-12-22 23:48:44,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:44,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445282052] [2020-12-22 23:48:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-22 23:48:44,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445282052] [2020-12-22 23:48:44,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628566963] [2020-12-22 23:48:44,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:45,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-22 23:48:45,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:45,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 23:48:45,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-22 23:48:45,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:45,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2020-12-22 23:48:45,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676663747] [2020-12-22 23:48:45,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 23:48:45,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:45,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 23:48:45,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:48:45,777 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand 38 states. [2020-12-22 23:48:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:45,958 INFO L93 Difference]: Finished difference Result 218 states and 276 transitions. [2020-12-22 23:48:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 23:48:45,958 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 91 [2020-12-22 23:48:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:45,960 INFO L225 Difference]: With dead ends: 218 [2020-12-22 23:48:45,960 INFO L226 Difference]: Without dead ends: 140 [2020-12-22 23:48:45,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:48:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-22 23:48:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2020-12-22 23:48:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 23:48:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2020-12-22 23:48:45,966 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 91 [2020-12-22 23:48:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:45,966 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2020-12-22 23:48:45,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 23:48:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2020-12-22 23:48:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 23:48:45,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:45,968 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:46,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 23:48:46,183 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:46,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1961812219, now seen corresponding path program 24 times [2020-12-22 23:48:46,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:46,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438988935] [2020-12-22 23:48:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-12-22 23:48:46,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438988935] [2020-12-22 23:48:46,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372158317] [2020-12-22 23:48:46,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:48,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 23:48:48,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:48,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:48:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-22 23:48:48,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:48,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 40 [2020-12-22 23:48:48,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879276982] [2020-12-22 23:48:48,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 23:48:48,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:48,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 23:48:48,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:48:48,442 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand 40 states. [2020-12-22 23:48:48,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:48,656 INFO L93 Difference]: Finished difference Result 232 states and 294 transitions. [2020-12-22 23:48:48,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 23:48:48,656 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 96 [2020-12-22 23:48:48,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:48,657 INFO L225 Difference]: With dead ends: 232 [2020-12-22 23:48:48,657 INFO L226 Difference]: Without dead ends: 148 [2020-12-22 23:48:48,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:48:48,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-22 23:48:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2020-12-22 23:48:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-22 23:48:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2020-12-22 23:48:48,664 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 96 [2020-12-22 23:48:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:48,664 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2020-12-22 23:48:48,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 23:48:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2020-12-22 23:48:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 23:48:48,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:48,666 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:48,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 23:48:48,879 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash -226001797, now seen corresponding path program 25 times [2020-12-22 23:48:48,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:48,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048814945] [2020-12-22 23:48:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-22 23:48:49,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048814945] [2020-12-22 23:48:49,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402206127] [2020-12-22 23:48:49,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:49,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 23:48:49,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-22 23:48:49,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:49,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 23:48:49,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091834947] [2020-12-22 23:48:49,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:48:49,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:49,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:48:49,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:49,398 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 29 states. [2020-12-22 23:48:49,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:49,469 INFO L93 Difference]: Finished difference Result 236 states and 296 transitions. [2020-12-22 23:48:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 23:48:49,469 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 101 [2020-12-22 23:48:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:49,470 INFO L225 Difference]: With dead ends: 236 [2020-12-22 23:48:49,470 INFO L226 Difference]: Without dead ends: 146 [2020-12-22 23:48:49,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-22 23:48:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-12-22 23:48:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-22 23:48:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2020-12-22 23:48:49,476 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 101 [2020-12-22 23:48:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:49,477 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2020-12-22 23:48:49,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:48:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2020-12-22 23:48:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 23:48:49,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:49,478 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:49,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 23:48:49,690 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:49,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1807904583, now seen corresponding path program 26 times [2020-12-22 23:48:49,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:49,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743727490] [2020-12-22 23:48:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-22 23:48:50,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743727490] [2020-12-22 23:48:50,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056577128] [2020-12-22 23:48:50,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:50,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:50,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:50,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 23:48:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-22 23:48:50,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:50,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 23:48:50,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404394606] [2020-12-22 23:48:50,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 23:48:50,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:50,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 23:48:50,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:48:50,366 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand 30 states. [2020-12-22 23:48:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:50,449 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2020-12-22 23:48:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:48:50,449 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 103 [2020-12-22 23:48:50,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:50,451 INFO L225 Difference]: With dead ends: 238 [2020-12-22 23:48:50,451 INFO L226 Difference]: Without dead ends: 148 [2020-12-22 23:48:50,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 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 23:48:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-22 23:48:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-12-22 23:48:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-22 23:48:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2020-12-22 23:48:50,459 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 103 [2020-12-22 23:48:50,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:50,460 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2020-12-22 23:48:50,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 23:48:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2020-12-22 23:48:50,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 23:48:50,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:50,461 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:50,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 23:48:50,675 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:50,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1598059145, now seen corresponding path program 27 times [2020-12-22 23:48:50,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:50,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427409763] [2020-12-22 23:48:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-22 23:48:51,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427409763] [2020-12-22 23:48:51,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874101632] [2020-12-22 23:48:51,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:51,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 23:48:51,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:48:51,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-12-22 23:48:51,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:51,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16] total 44 [2020-12-22 23:48:51,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397631467] [2020-12-22 23:48:51,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 23:48:51,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:51,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 23:48:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:48:51,724 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 44 states. [2020-12-22 23:48:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:51,880 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2020-12-22 23:48:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 23:48:51,881 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 105 [2020-12-22 23:48:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:51,882 INFO L225 Difference]: With dead ends: 250 [2020-12-22 23:48:51,882 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 23:48:51,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:48:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 23:48:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2020-12-22 23:48:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 23:48:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2020-12-22 23:48:51,889 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 105 [2020-12-22 23:48:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:51,889 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2020-12-22 23:48:51,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 23:48:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2020-12-22 23:48:51,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 23:48:51,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:51,891 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:52,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:52,106 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:52,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:52,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1910005517, now seen corresponding path program 28 times [2020-12-22 23:48:52,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:52,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415923469] [2020-12-22 23:48:52,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-22 23:48:52,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415923469] [2020-12-22 23:48:52,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166197508] [2020-12-22 23:48:52,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:52,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:52,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:52,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 23:48:52,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-22 23:48:52,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:52,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 23:48:52,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26749828] [2020-12-22 23:48:52,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 23:48:52,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:52,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 23:48:52,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:48:52,802 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand 32 states. [2020-12-22 23:48:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:52,895 INFO L93 Difference]: Finished difference Result 254 states and 318 transitions. [2020-12-22 23:48:52,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 23:48:52,896 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 110 [2020-12-22 23:48:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:52,897 INFO L225 Difference]: With dead ends: 254 [2020-12-22 23:48:52,897 INFO L226 Difference]: Without dead ends: 158 [2020-12-22 23:48:52,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:48:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-22 23:48:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-12-22 23:48:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 23:48:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 189 transitions. [2020-12-22 23:48:52,904 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 189 transitions. Word has length 110 [2020-12-22 23:48:52,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:52,904 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 189 transitions. [2020-12-22 23:48:52,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 23:48:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 189 transitions. [2020-12-22 23:48:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 23:48:52,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:52,906 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:53,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:53,120 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1132605583, now seen corresponding path program 29 times [2020-12-22 23:48:53,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:53,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999204431] [2020-12-22 23:48:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-22 23:48:53,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999204431] [2020-12-22 23:48:53,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810444030] [2020-12-22 23:48:53,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:57,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-22 23:48:57,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:57,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:48:57,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-12-22 23:48:58,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:58,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 17] total 47 [2020-12-22 23:48:58,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085288406] [2020-12-22 23:48:58,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 23:48:58,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 23:48:58,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:48:58,288 INFO L87 Difference]: Start difference. First operand 157 states and 189 transitions. Second operand 47 states. [2020-12-22 23:48:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:58,530 INFO L93 Difference]: Finished difference Result 266 states and 336 transitions. [2020-12-22 23:48:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 23:48:58,530 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 112 [2020-12-22 23:48:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:58,532 INFO L225 Difference]: With dead ends: 266 [2020-12-22 23:48:58,532 INFO L226 Difference]: Without dead ends: 170 [2020-12-22 23:48:58,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:48:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-22 23:48:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-22 23:48:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-22 23:48:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2020-12-22 23:48:58,539 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 112 [2020-12-22 23:48:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:58,539 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2020-12-22 23:48:58,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 23:48:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2020-12-22 23:48:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 23:48:58,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:58,541 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:58,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:58,755 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:58,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1997294257, now seen corresponding path program 30 times [2020-12-22 23:48:58,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:58,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308007256] [2020-12-22 23:48:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-12-22 23:48:59,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308007256] [2020-12-22 23:48:59,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25541581] [2020-12-22 23:48:59,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:03,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 23:49:03,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:03,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 23:49:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-12-22 23:49:04,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:04,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 18] total 49 [2020-12-22 23:49:04,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656863732] [2020-12-22 23:49:04,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 23:49:04,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:04,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 23:49:04,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:49:04,413 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand 49 states. [2020-12-22 23:49:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:04,623 INFO L93 Difference]: Finished difference Result 280 states and 354 transitions. [2020-12-22 23:49:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 23:49:04,624 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 117 [2020-12-22 23:49:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:04,625 INFO L225 Difference]: With dead ends: 280 [2020-12-22 23:49:04,625 INFO L226 Difference]: Without dead ends: 178 [2020-12-22 23:49:04,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:49:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-22 23:49:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2020-12-22 23:49:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-22 23:49:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2020-12-22 23:49:04,632 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 117 [2020-12-22 23:49:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:04,632 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2020-12-22 23:49:04,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 23:49:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2020-12-22 23:49:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 23:49:04,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:04,634 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:04,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 23:49:04,849 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:04,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1124602733, now seen corresponding path program 31 times [2020-12-22 23:49:04,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:04,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956788371] [2020-12-22 23:49:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-22 23:49:05,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956788371] [2020-12-22 23:49:05,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978170817] [2020-12-22 23:49:05,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:05,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 23:49:05,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-22 23:49:05,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:05,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 23:49:05,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047446179] [2020-12-22 23:49:05,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 23:49:05,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:05,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 23:49:05,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:49:05,639 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand 35 states. [2020-12-22 23:49:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:05,747 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2020-12-22 23:49:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 23:49:05,754 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 122 [2020-12-22 23:49:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:05,755 INFO L225 Difference]: With dead ends: 284 [2020-12-22 23:49:05,755 INFO L226 Difference]: Without dead ends: 176 [2020-12-22 23:49:05,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:49:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-22 23:49:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-12-22 23:49:05,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 23:49:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2020-12-22 23:49:05,761 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 122 [2020-12-22 23:49:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:05,762 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2020-12-22 23:49:05,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 23:49:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2020-12-22 23:49:05,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 23:49:05,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:05,763 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:05,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:05,978 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:05,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1878625045, now seen corresponding path program 32 times [2020-12-22 23:49:05,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:05,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615414257] [2020-12-22 23:49:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-22 23:49:06,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615414257] [2020-12-22 23:49:06,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772673818] [2020-12-22 23:49:06,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:06,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:06,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:06,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 23:49:06,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-22 23:49:06,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:06,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 23:49:06,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759639818] [2020-12-22 23:49:06,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 23:49:06,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:06,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 23:49:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:49:06,838 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand 36 states. [2020-12-22 23:49:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:06,933 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2020-12-22 23:49:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 23:49:06,933 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2020-12-22 23:49:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:06,934 INFO L225 Difference]: With dead ends: 286 [2020-12-22 23:49:06,935 INFO L226 Difference]: Without dead ends: 178 [2020-12-22 23:49:06,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 124 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 23:49:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-22 23:49:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-12-22 23:49:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 23:49:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2020-12-22 23:49:06,942 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 124 [2020-12-22 23:49:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:06,942 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2020-12-22 23:49:06,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 23:49:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2020-12-22 23:49:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 23:49:06,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:06,944 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:07,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 23:49:07,159 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:07,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1762496791, now seen corresponding path program 33 times [2020-12-22 23:49:07,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:07,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122421023] [2020-12-22 23:49:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-22 23:49:07,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122421023] [2020-12-22 23:49:07,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987431998] [2020-12-22 23:49:07,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:08,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 23:49:08,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:08,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:49:08,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-12-22 23:49:08,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:08,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19] total 53 [2020-12-22 23:49:08,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509092626] [2020-12-22 23:49:08,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 23:49:08,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:08,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 23:49:08,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 23:49:08,634 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand 53 states. [2020-12-22 23:49:08,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:08,901 INFO L93 Difference]: Finished difference Result 298 states and 376 transitions. [2020-12-22 23:49:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 23:49:08,902 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 126 [2020-12-22 23:49:08,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:08,904 INFO L225 Difference]: With dead ends: 298 [2020-12-22 23:49:08,904 INFO L226 Difference]: Without dead ends: 190 [2020-12-22 23:49:08,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 23:49:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-22 23:49:08,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2020-12-22 23:49:08,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-22 23:49:08,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 223 transitions. [2020-12-22 23:49:08,915 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 223 transitions. Word has length 126 [2020-12-22 23:49:08,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:08,916 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 223 transitions. [2020-12-22 23:49:08,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 23:49:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 223 transitions. [2020-12-22 23:49:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 23:49:08,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:08,917 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:09,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:09,133 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:09,134 INFO L82 PathProgramCache]: Analyzing trace with hash 247814313, now seen corresponding path program 34 times [2020-12-22 23:49:09,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:09,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960019596] [2020-12-22 23:49:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-12-22 23:49:09,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960019596] [2020-12-22 23:49:09,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348878375] [2020-12-22 23:49:09,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:09,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:09,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:09,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 23:49:09,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-12-22 23:49:10,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:10,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 23:49:10,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428969161] [2020-12-22 23:49:10,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 23:49:10,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:10,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 23:49:10,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:49:10,061 INFO L87 Difference]: Start difference. First operand 185 states and 223 transitions. Second operand 38 states. [2020-12-22 23:49:10,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:10,199 INFO L93 Difference]: Finished difference Result 302 states and 378 transitions. [2020-12-22 23:49:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 23:49:10,204 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 131 [2020-12-22 23:49:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:10,207 INFO L225 Difference]: With dead ends: 302 [2020-12-22 23:49:10,208 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 23:49:10,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:49:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 23:49:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-12-22 23:49:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 23:49:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2020-12-22 23:49:10,222 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 131 [2020-12-22 23:49:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:10,222 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2020-12-22 23:49:10,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 23:49:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2020-12-22 23:49:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 23:49:10,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:10,223 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:10,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 23:49:10,437 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:10,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1912542105, now seen corresponding path program 35 times [2020-12-22 23:49:10,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:10,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017404311] [2020-12-22 23:49:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-12-22 23:49:11,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017404311] [2020-12-22 23:49:11,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499485660] [2020-12-22 23:49:11,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:17,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-22 23:49:17,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:17,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 23:49:17,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-12-22 23:49:17,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:17,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20] total 56 [2020-12-22 23:49:17,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225320083] [2020-12-22 23:49:17,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 23:49:17,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:17,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 23:49:17,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 23:49:17,947 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand 56 states. [2020-12-22 23:49:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:18,168 INFO L93 Difference]: Finished difference Result 314 states and 396 transitions. [2020-12-22 23:49:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 23:49:18,169 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2020-12-22 23:49:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:18,170 INFO L225 Difference]: With dead ends: 314 [2020-12-22 23:49:18,170 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 23:49:18,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 23:49:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 23:49:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2020-12-22 23:49:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 23:49:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 235 transitions. [2020-12-22 23:49:18,178 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 235 transitions. Word has length 133 [2020-12-22 23:49:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:18,178 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 235 transitions. [2020-12-22 23:49:18,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 23:49:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 235 transitions. [2020-12-22 23:49:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 23:49:18,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:18,179 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:18,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 23:49:18,380 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:18,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:18,381 INFO L82 PathProgramCache]: Analyzing trace with hash 550249245, now seen corresponding path program 36 times [2020-12-22 23:49:18,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:18,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529721569] [2020-12-22 23:49:18,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2020-12-22 23:49:19,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529721569] [2020-12-22 23:49:19,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991771615] [2020-12-22 23:49:19,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:29,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 23:49:29,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:29,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 23:49:29,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 72 proven. 477 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-12-22 23:49:30,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:30,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 23] total 60 [2020-12-22 23:49:30,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412790635] [2020-12-22 23:49:30,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 23:49:30,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:30,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 23:49:30,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=2511, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 23:49:30,292 INFO L87 Difference]: Start difference. First operand 195 states and 235 transitions. Second operand 60 states. [2020-12-22 23:49:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:31,222 INFO L93 Difference]: Finished difference Result 329 states and 416 transitions. [2020-12-22 23:49:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 23:49:31,222 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 138 [2020-12-22 23:49:31,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:31,224 INFO L225 Difference]: With dead ends: 329 [2020-12-22 23:49:31,224 INFO L226 Difference]: Without dead ends: 209 [2020-12-22 23:49:31,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1447, Invalid=4715, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 23:49:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-22 23:49:31,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2020-12-22 23:49:31,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-22 23:49:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2020-12-22 23:49:31,234 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 138 [2020-12-22 23:49:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:31,234 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2020-12-22 23:49:31,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 23:49:31,234 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2020-12-22 23:49:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 23:49:31,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:31,236 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:31,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 23:49:31,452 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:31,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1263614625, now seen corresponding path program 37 times [2020-12-22 23:49:31,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:31,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439714950] [2020-12-22 23:49:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-22 23:49:32,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439714950] [2020-12-22 23:49:32,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211381112] [2020-12-22 23:49:32,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 23:49:32,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-22 23:49:32,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:32,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 23:49:32,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044665153] [2020-12-22 23:49:32,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 23:49:32,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:32,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 23:49:32,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 23:49:32,572 INFO L87 Difference]: Start difference. First operand 205 states and 247 transitions. Second operand 42 states. [2020-12-22 23:49:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:32,724 INFO L93 Difference]: Finished difference Result 334 states and 418 transitions. [2020-12-22 23:49:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 23:49:32,724 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 145 [2020-12-22 23:49:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:32,726 INFO L225 Difference]: With dead ends: 334 [2020-12-22 23:49:32,726 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 23:49:32,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 23:49:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 23:49:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-12-22 23:49:32,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-22 23:49:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2020-12-22 23:49:32,734 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 145 [2020-12-22 23:49:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:32,734 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2020-12-22 23:49:32,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 23:49:32,735 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2020-12-22 23:49:32,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 23:49:32,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:32,736 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:32,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 23:49:32,949 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1238865441, now seen corresponding path program 38 times [2020-12-22 23:49:32,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:32,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393582048] [2020-12-22 23:49:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-22 23:49:33,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393582048] [2020-12-22 23:49:33,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491495342] [2020-12-22 23:49:33,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:33,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:33,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 23:49:33,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-22 23:49:34,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:34,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 23:49:34,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409962184] [2020-12-22 23:49:34,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 23:49:34,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:34,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 23:49:34,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 23:49:34,137 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand 43 states. [2020-12-22 23:49:34,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:34,272 INFO L93 Difference]: Finished difference Result 336 states and 420 transitions. [2020-12-22 23:49:34,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 23:49:34,272 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 147 [2020-12-22 23:49:34,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:34,273 INFO L225 Difference]: With dead ends: 336 [2020-12-22 23:49:34,273 INFO L226 Difference]: Without dead ends: 210 [2020-12-22 23:49:34,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 23:49:34,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-22 23:49:34,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-12-22 23:49:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-22 23:49:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 251 transitions. [2020-12-22 23:49:34,281 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 251 transitions. Word has length 147 [2020-12-22 23:49:34,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:34,281 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 251 transitions. [2020-12-22 23:49:34,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 23:49:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 251 transitions. [2020-12-22 23:49:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 23:49:34,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:34,282 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:34,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:34,494 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash -940523107, now seen corresponding path program 39 times [2020-12-22 23:49:34,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:34,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327365293] [2020-12-22 23:49:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-22 23:49:35,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327365293] [2020-12-22 23:49:35,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006021772] [2020-12-22 23:49:35,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:35,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-22 23:49:35,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:35,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 23:49:35,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 80 proven. 532 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-12-22 23:49:36,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:36,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 24] total 65 [2020-12-22 23:49:36,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169277186] [2020-12-22 23:49:36,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 23:49:36,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:36,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 23:49:36,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 23:49:36,778 INFO L87 Difference]: Start difference. First operand 209 states and 251 transitions. Second operand 65 states. [2020-12-22 23:49:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:37,905 INFO L93 Difference]: Finished difference Result 349 states and 440 transitions. [2020-12-22 23:49:37,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 23:49:37,906 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 149 [2020-12-22 23:49:37,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:37,907 INFO L225 Difference]: With dead ends: 349 [2020-12-22 23:49:37,907 INFO L226 Difference]: Without dead ends: 223 [2020-12-22 23:49:37,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1680, Invalid=5460, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 23:49:37,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-22 23:49:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2020-12-22 23:49:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-22 23:49:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 263 transitions. [2020-12-22 23:49:37,915 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 263 transitions. Word has length 149 [2020-12-22 23:49:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:37,915 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 263 transitions. [2020-12-22 23:49:37,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 23:49:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 263 transitions. [2020-12-22 23:49:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 23:49:37,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:37,916 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:38,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 23:49:38,117 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:38,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1691192489, now seen corresponding path program 40 times [2020-12-22 23:49:38,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:38,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019487927] [2020-12-22 23:49:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-12-22 23:49:39,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019487927] [2020-12-22 23:49:39,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257295899] [2020-12-22 23:49:39,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:39,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:39,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:39,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 23:49:39,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 1 proven. 590 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-12-22 23:49:40,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:40,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 23] total 66 [2020-12-22 23:49:40,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799374797] [2020-12-22 23:49:40,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 23:49:40,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:40,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 23:49:40,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 23:49:40,162 INFO L87 Difference]: Start difference. First operand 219 states and 263 transitions. Second operand 66 states. [2020-12-22 23:49:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:40,521 INFO L93 Difference]: Finished difference Result 364 states and 458 transitions. [2020-12-22 23:49:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 23:49:40,522 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 156 [2020-12-22 23:49:40,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:40,523 INFO L225 Difference]: With dead ends: 364 [2020-12-22 23:49:40,523 INFO L226 Difference]: Without dead ends: 232 [2020-12-22 23:49:40,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 23:49:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-22 23:49:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 227. [2020-12-22 23:49:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-22 23:49:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 273 transitions. [2020-12-22 23:49:40,534 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 273 transitions. Word has length 156 [2020-12-22 23:49:40,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:40,536 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 273 transitions. [2020-12-22 23:49:40,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 23:49:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 273 transitions. [2020-12-22 23:49:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 23:49:40,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:40,538 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:40,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:40,751 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:40,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:40,752 INFO L82 PathProgramCache]: Analyzing trace with hash -682288297, now seen corresponding path program 41 times [2020-12-22 23:49:40,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:40,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177903779] [2020-12-22 23:49:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2020-12-22 23:49:41,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177903779] [2020-12-22 23:49:41,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632517634] [2020-12-22 23:49:41,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:46,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-22 23:50:46,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 23:50:46,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 1 proven. 651 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2020-12-22 23:50:47,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:47,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 24] total 68 [2020-12-22 23:50:47,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573996725] [2020-12-22 23:50:47,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 23:50:47,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:47,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 23:50:47,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1310, Invalid=3246, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 23:50:47,497 INFO L87 Difference]: Start difference. First operand 227 states and 273 transitions. Second operand 68 states. [2020-12-22 23:50:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:47,862 INFO L93 Difference]: Finished difference Result 378 states and 476 transitions. [2020-12-22 23:50:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 23:50:47,863 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 161 [2020-12-22 23:50:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:47,866 INFO L225 Difference]: With dead ends: 378 [2020-12-22 23:50:47,866 INFO L226 Difference]: Without dead ends: 240 [2020-12-22 23:50:47,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1310, Invalid=3246, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 23:50:47,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-22 23:50:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2020-12-22 23:50:47,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-22 23:50:47,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2020-12-22 23:50:47,875 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 161 [2020-12-22 23:50:47,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:47,875 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2020-12-22 23:50:47,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 23:50:47,876 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2020-12-22 23:50:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 23:50:47,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:47,877 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:48,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:48,078 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:48,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:48,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1050437843, now seen corresponding path program 42 times [2020-12-22 23:50:48,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:48,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116586595] [2020-12-22 23:50:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-12-22 23:50:49,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116586595] [2020-12-22 23:50:49,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202110597] [2020-12-22 23:50:49,295 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 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 23:51:16,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2020-12-22 23:51:16,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:16,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:51:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2020-12-22 23:51:17,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:17,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 25] total 70 [2020-12-22 23:51:17,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379058556] [2020-12-22 23:51:17,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 23:51:17,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 23:51:17,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 23:51:17,907 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand 70 states. [2020-12-22 23:51:18,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:18,276 INFO L93 Difference]: Finished difference Result 392 states and 494 transitions. [2020-12-22 23:51:18,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 23:51:18,276 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 166 [2020-12-22 23:51:18,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:18,278 INFO L225 Difference]: With dead ends: 392 [2020-12-22 23:51:18,279 INFO L226 Difference]: Without dead ends: 248 [2020-12-22 23:51:18,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 23:51:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-22 23:51:18,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 243. [2020-12-22 23:51:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-22 23:51:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 293 transitions. [2020-12-22 23:51:18,288 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 293 transitions. Word has length 166 [2020-12-22 23:51:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:18,288 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 293 transitions. [2020-12-22 23:51:18,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 23:51:18,288 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 293 transitions. [2020-12-22 23:51:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 23:51:18,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:18,290 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:18,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 23:51:18,491 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:18,492 INFO L82 PathProgramCache]: Analyzing trace with hash -180945709, now seen corresponding path program 43 times [2020-12-22 23:51:18,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:18,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784407875] [2020-12-22 23:51:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-22 23:51:19,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784407875] [2020-12-22 23:51:19,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077761134] [2020-12-22 23:51:19,658 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 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 23:51:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:19,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 23:51:19,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-22 23:51:20,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:20,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 23:51:20,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542330556] [2020-12-22 23:51:20,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 23:51:20,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:20,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 23:51:20,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:51:20,011 INFO L87 Difference]: Start difference. First operand 243 states and 293 transitions. Second operand 49 states. [2020-12-22 23:51:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:20,190 INFO L93 Difference]: Finished difference Result 396 states and 496 transitions. [2020-12-22 23:51:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 23:51:20,191 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2020-12-22 23:51:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:20,193 INFO L225 Difference]: With dead ends: 396 [2020-12-22 23:51:20,193 INFO L226 Difference]: Without dead ends: 246 [2020-12-22 23:51:20,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:51:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-22 23:51:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2020-12-22 23:51:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-12-22 23:51:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 295 transitions. [2020-12-22 23:51:20,202 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 295 transitions. Word has length 171 [2020-12-22 23:51:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:20,202 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 295 transitions. [2020-12-22 23:51:20,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 23:51:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 295 transitions. [2020-12-22 23:51:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 23:51:20,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:20,204 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:20,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 23:51:20,419 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:20,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1258063215, now seen corresponding path program 44 times [2020-12-22 23:51:20,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:20,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870635472] [2020-12-22 23:51:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-22 23:51:21,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870635472] [2020-12-22 23:51:21,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250740412] [2020-12-22 23:51:21,720 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 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 23:51:21,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:51:21,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 23:51:21,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-22 23:51:22,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:22,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 23:51:22,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931510568] [2020-12-22 23:51:22,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 23:51:22,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:22,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 23:51:22,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 23:51:22,074 INFO L87 Difference]: Start difference. First operand 245 states and 295 transitions. Second operand 50 states. [2020-12-22 23:51:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:22,246 INFO L93 Difference]: Finished difference Result 398 states and 498 transitions. [2020-12-22 23:51:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 23:51:22,249 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 173 [2020-12-22 23:51:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:22,251 INFO L225 Difference]: With dead ends: 398 [2020-12-22 23:51:22,251 INFO L226 Difference]: Without dead ends: 248 [2020-12-22 23:51:22,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 23:51:22,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-22 23:51:22,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2020-12-22 23:51:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-22 23:51:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2020-12-22 23:51:22,262 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 173 [2020-12-22 23:51:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:22,262 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2020-12-22 23:51:22,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 23:51:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2020-12-22 23:51:22,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-22 23:51:22,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:22,264 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:22,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 23:51:22,479 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:22,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1280868145, now seen corresponding path program 45 times [2020-12-22 23:51:22,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:22,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163446027] [2020-12-22 23:51:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-22 23:51:23,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163446027] [2020-12-22 23:51:23,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777452408] [2020-12-22 23:51:23,799 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 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 23:51:25,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2020-12-22 23:51:25,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:26,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 23:51:26,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 94 proven. 782 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2020-12-22 23:51:27,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:27,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 28] total 76 [2020-12-22 23:51:27,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725995361] [2020-12-22 23:51:27,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-22 23:51:27,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:27,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-22 23:51:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1650, Invalid=4050, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 23:51:27,231 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand 76 states. [2020-12-22 23:51:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:28,758 INFO L93 Difference]: Finished difference Result 411 states and 518 transitions. [2020-12-22 23:51:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-22 23:51:28,759 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 175 [2020-12-22 23:51:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:28,761 INFO L225 Difference]: With dead ends: 411 [2020-12-22 23:51:28,761 INFO L226 Difference]: Without dead ends: 261 [2020-12-22 23:51:28,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2298, Invalid=7602, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 23:51:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-22 23:51:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2020-12-22 23:51:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-22 23:51:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 309 transitions. [2020-12-22 23:51:28,770 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 309 transitions. Word has length 175 [2020-12-22 23:51:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:28,770 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 309 transitions. [2020-12-22 23:51:28,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-22 23:51:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 309 transitions. [2020-12-22 23:51:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-22 23:51:28,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:28,772 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:28,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:28,979 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:28,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1237945143, now seen corresponding path program 46 times [2020-12-22 23:51:28,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:28,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179637309] [2020-12-22 23:51:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2020-12-22 23:51:30,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179637309] [2020-12-22 23:51:30,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716856696] [2020-12-22 23:51:30,413 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:30,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:51:30,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:30,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 23:51:30,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2020-12-22 23:51:30,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:30,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 23:51:30,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860142653] [2020-12-22 23:51:30,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 23:51:30,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:30,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 23:51:30,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 23:51:30,772 INFO L87 Difference]: Start difference. First operand 257 states and 309 transitions. Second operand 53 states. [2020-12-22 23:51:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:30,995 INFO L93 Difference]: Finished difference Result 416 states and 520 transitions. [2020-12-22 23:51:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 23:51:30,996 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 182 [2020-12-22 23:51:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:30,999 INFO L225 Difference]: With dead ends: 416 [2020-12-22 23:51:30,999 INFO L226 Difference]: Without dead ends: 260 [2020-12-22 23:51:31,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 23:51:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-22 23:51:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2020-12-22 23:51:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-22 23:51:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 311 transitions. [2020-12-22 23:51:31,011 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 311 transitions. Word has length 182 [2020-12-22 23:51:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:31,011 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 311 transitions. [2020-12-22 23:51:31,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 23:51:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 311 transitions. [2020-12-22 23:51:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-22 23:51:31,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:31,014 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:31,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 23:51:31,229 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:31,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1712695993, now seen corresponding path program 47 times [2020-12-22 23:51:31,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:31,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31405470] [2020-12-22 23:51:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2020-12-22 23:51:32,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31405470] [2020-12-22 23:51:32,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180239791] [2020-12-22 23:51:32,725 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 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 23:52:06,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2020-12-22 23:52:06,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:06,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 23:52:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1 proven. 852 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2020-12-22 23:52:08,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:08,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 27] total 78 [2020-12-22 23:52:08,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927214660] [2020-12-22 23:52:08,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-22 23:52:08,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:08,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-22 23:52:08,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 23:52:08,191 INFO L87 Difference]: Start difference. First operand 259 states and 311 transitions. Second operand 78 states. [2020-12-22 23:52:08,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:08,675 INFO L93 Difference]: Finished difference Result 428 states and 538 transitions. [2020-12-22 23:52:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 23:52:08,675 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 184 [2020-12-22 23:52:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:08,677 INFO L225 Difference]: With dead ends: 428 [2020-12-22 23:52:08,677 INFO L226 Difference]: Without dead ends: 272 [2020-12-22 23:52:08,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 23:52:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-22 23:52:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 267. [2020-12-22 23:52:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 23:52:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 321 transitions. [2020-12-22 23:52:08,687 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 321 transitions. Word has length 184 [2020-12-22 23:52:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:08,687 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 321 transitions. [2020-12-22 23:52:08,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-22 23:52:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 321 transitions. [2020-12-22 23:52:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-22 23:52:08,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:08,689 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:08,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 23:52:08,904 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1136663111, now seen corresponding path program 48 times [2020-12-22 23:52:08,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:08,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813191299] [2020-12-22 23:52:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2020-12-22 23:52:10,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813191299] [2020-12-22 23:52:10,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443194152] [2020-12-22 23:52:10,621 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 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