/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/standard_seq_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:00:56,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:00:56,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:00:56,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:00:56,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:00:56,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:00:56,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:00:56,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:00:56,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:00:56,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:00:56,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:00:56,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:00:56,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:00:56,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:00:56,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:00:56,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:00:56,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:00:56,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:00:56,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:00:56,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:00:56,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:00:56,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:00:56,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:00:56,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:00:56,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 10:00:56,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 10:00:56,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 10:00:56,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 10:00:56,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 10:00:56,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 10:00:56,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:00:56,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:00:56,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:00:56,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:00:56,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:00:56,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:00:56,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:00:56,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:00:56,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:00:56,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:00:56,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:00:56,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:00:56,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:00:56,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:00:56,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:00:56,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:00:56,743 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:00:56,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:00:56,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:00:56,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:00:56,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:00:56,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:00:56,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:00:56,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:00:56,746 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:00:56,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:00:56,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:00:56,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:00:56,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:00:56,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:00:56,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:00:56,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:00:56,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:00:56,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:00:56,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:00:56,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:00:56,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:00:56,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:00:57,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:00:57,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:00:57,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:00:57,227 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:00:57,228 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:00:57,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_seq_init_ground.i [2021-01-06 10:00:57,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4a3511f68/da2ab6100de74cf8b39b8e7a320528ff/FLAGd457fe354 [2021-01-06 10:00:58,012 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:00:58,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_seq_init_ground.i [2021-01-06 10:00:58,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4a3511f68/da2ab6100de74cf8b39b8e7a320528ff/FLAGd457fe354 [2021-01-06 10:00:58,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4a3511f68/da2ab6100de74cf8b39b8e7a320528ff [2021-01-06 10:00:58,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:00:58,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:00:58,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:00:58,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:00:58,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:00:58,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:00:58" (1/1) ... [2021-01-06 10:00:58,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a7bd0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58, skipping insertion in model container [2021-01-06 10:00:58,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:00:58" (1/1) ... [2021-01-06 10:00:58,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:00:58,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:00:58,566 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/standard_seq_init_ground.i[817,830] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 10:00:58,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:00:58,602 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:00:58,620 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/standard_seq_init_ground.i[817,830] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],StructAccessExpression[IdentifierExpression[~#a~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 10:00:58,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:00:58,662 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:00:58,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58 WrapperNode [2021-01-06 10:00:58,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:00:58,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:00:58,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:00:58,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:00:58,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58" (1/1) ... [2021-01-06 10:00:58,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58" (1/1) ... [2021-01-06 10:00:58,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:00:58,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:00:58,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:00:58,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:00:58,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58" (1/1) ... [2021-01-06 10:00:58,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58" (1/1) ... [2021-01-06 10:00:58,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58" (1/1) ... [2021-01-06 10:00:58,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58" (1/1) ... [2021-01-06 10:00:58,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58" (1/1) ... [2021-01-06 10:00:58,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58" (1/1) ... [2021-01-06 10:00:58,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58" (1/1) ... [2021-01-06 10:00:58,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:00:58,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:00:58,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:00:58,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:00:58,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:00:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:00:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:00:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:00:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:00:58,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:00:58,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:00:58,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:00:59,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:00:59,212 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:00:59,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:00:59 BoogieIcfgContainer [2021-01-06 10:00:59,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:00:59,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:00:59,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:00:59,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:00:59,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:00:58" (1/3) ... [2021-01-06 10:00:59,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4256123c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:00:59, skipping insertion in model container [2021-01-06 10:00:59,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:00:58" (2/3) ... [2021-01-06 10:00:59,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4256123c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:00:59, skipping insertion in model container [2021-01-06 10:00:59,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:00:59" (3/3) ... [2021-01-06 10:00:59,226 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_seq_init_ground.i [2021-01-06 10:00:59,236 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:00:59,244 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:00:59,271 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:00:59,308 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:00:59,309 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:00:59,309 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:00:59,309 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:00:59,309 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:00:59,310 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:00:59,310 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:00:59,310 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:00:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-01-06 10:00:59,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 10:00:59,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:00:59,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:00:59,350 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:00:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:00:59,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1808850128, now seen corresponding path program 1 times [2021-01-06 10:00:59,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:00:59,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840074209] [2021-01-06 10:00:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:00:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:00:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:00:59,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840074209] [2021-01-06 10:00:59,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:00:59,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:00:59,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060110940] [2021-01-06 10:00:59,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:00:59,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:00:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:00:59,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:00:59,879 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2021-01-06 10:00:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:00:59,962 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2021-01-06 10:00:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:00:59,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-01-06 10:00:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:00:59,982 INFO L225 Difference]: With dead ends: 26 [2021-01-06 10:00:59,982 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 10:00:59,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:01:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 10:01:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 10:01:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 10:01:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-01-06 10:01:00,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2021-01-06 10:01:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:00,035 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-01-06 10:01:00,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:01:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-01-06 10:01:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 10:01:00,036 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:00,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:00,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:01:00,037 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:00,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash 291255051, now seen corresponding path program 1 times [2021-01-06 10:01:00,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:00,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39259501] [2021-01-06 10:01:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:00,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39259501] [2021-01-06 10:01:00,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980398931] [2021-01-06 10:01:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:00,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:01:00,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:00,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:00,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:01:00,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46910201] [2021-01-06 10:01:00,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:01:00,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:00,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:01:00,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:01:00,295 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2021-01-06 10:01:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:00,325 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-01-06 10:01:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:01:00,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 10:01:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:00,328 INFO L225 Difference]: With dead ends: 19 [2021-01-06 10:01:00,328 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 10:01:00,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:01:00,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 10:01:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 10:01:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 10:01:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 10:01:00,335 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-01-06 10:01:00,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:00,335 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 10:01:00,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:01:00,336 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 10:01:00,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:01:00,336 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:00,336 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:00,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:01:00,551 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:00,554 INFO L82 PathProgramCache]: Analyzing trace with hash 490447920, now seen corresponding path program 2 times [2021-01-06 10:01:00,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:00,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964370468] [2021-01-06 10:01:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:00,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964370468] [2021-01-06 10:01:00,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164464966] [2021-01-06 10:01:00,694 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:00,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:00,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:01:00,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:00,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:00,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:01:00,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427287249] [2021-01-06 10:01:00,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:01:00,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:00,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:01:00,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:01:00,952 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2021-01-06 10:01:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:00,986 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-01-06 10:01:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:01:00,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-06 10:01:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:00,990 INFO L225 Difference]: With dead ends: 20 [2021-01-06 10:01:00,990 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 10:01:00,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:01:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 10:01:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 10:01:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 10:01:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 10:01:00,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-01-06 10:01:00,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:00,996 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 10:01:00,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:01:00,996 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 10:01:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:01:00,997 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:00,997 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:01,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:01,212 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:01,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1924507733, now seen corresponding path program 3 times [2021-01-06 10:01:01,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:01,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660164723] [2021-01-06 10:01:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:01,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660164723] [2021-01-06 10:01:01,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874561536] [2021-01-06 10:01:01,301 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:01,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:01:01,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:01:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:01,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:01,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:01:01,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943355647] [2021-01-06 10:01:01,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:01:01,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:01,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:01:01,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:01:01,470 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2021-01-06 10:01:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:01,508 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-01-06 10:01:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:01:01,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2021-01-06 10:01:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:01,516 INFO L225 Difference]: With dead ends: 21 [2021-01-06 10:01:01,516 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 10:01:01,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:01:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 10:01:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 10:01:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 10:01:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 10:01:01,526 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-01-06 10:01:01,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:01,526 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 10:01:01,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:01:01,527 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 10:01:01,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:01:01,527 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:01,528 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:01,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:01,730 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:01,731 INFO L82 PathProgramCache]: Analyzing trace with hash 521278352, now seen corresponding path program 4 times [2021-01-06 10:01:01,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:01,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341574835] [2021-01-06 10:01:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:01,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341574835] [2021-01-06 10:01:01,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315432489] [2021-01-06 10:01:01,812 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:01,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:01,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:01,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:01:01,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:01,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:01,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 10:01:01,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466557272] [2021-01-06 10:01:01,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:01:01,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:01,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:01:01,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:01:01,938 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2021-01-06 10:01:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:01,965 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-01-06 10:01:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:01:01,965 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-01-06 10:01:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:01,966 INFO L225 Difference]: With dead ends: 22 [2021-01-06 10:01:01,967 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 10:01:01,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:01:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 10:01:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 10:01:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 10:01:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 10:01:01,973 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-01-06 10:01:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:01,973 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 10:01:01,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:01:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 10:01:01,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:01:01,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:01,975 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:02,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:02,190 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:02,191 INFO L82 PathProgramCache]: Analyzing trace with hash -968764341, now seen corresponding path program 5 times [2021-01-06 10:01:02,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:02,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827850457] [2021-01-06 10:01:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:02,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827850457] [2021-01-06 10:01:02,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462186741] [2021-01-06 10:01:02,332 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:02,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 10:01:02,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:02,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:01:02,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:02,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:02,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:01:02,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076902646] [2021-01-06 10:01:02,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:01:02,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:02,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:01:02,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:01:02,531 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2021-01-06 10:01:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:02,554 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-01-06 10:01:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:01:02,555 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2021-01-06 10:01:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:02,556 INFO L225 Difference]: With dead ends: 23 [2021-01-06 10:01:02,556 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 10:01:02,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:01:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 10:01:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 10:01:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 10:01:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-01-06 10:01:02,562 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-01-06 10:01:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:02,563 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-01-06 10:01:02,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:01:02,563 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-01-06 10:01:02,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:01:02,564 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:02,564 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:02,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:01:02,779 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:02,780 INFO L82 PathProgramCache]: Analyzing trace with hash 84552432, now seen corresponding path program 6 times [2021-01-06 10:01:02,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:02,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623804611] [2021-01-06 10:01:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:02,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623804611] [2021-01-06 10:01:02,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064170204] [2021-01-06 10:01:02,908 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:02,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 10:01:02,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:02,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:01:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:03,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:03,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:01:03,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810708855] [2021-01-06 10:01:03,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:01:03,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:03,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:01:03,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:01:03,048 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2021-01-06 10:01:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:03,078 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 10:01:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:01:03,079 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2021-01-06 10:01:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:03,082 INFO L225 Difference]: With dead ends: 24 [2021-01-06 10:01:03,082 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 10:01:03,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:01:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 10:01:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 10:01:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:01:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 10:01:03,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-01-06 10:01:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:03,096 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 10:01:03,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:01:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 10:01:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:01:03,101 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:03,101 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:03,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:03,303 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1622365973, now seen corresponding path program 7 times [2021-01-06 10:01:03,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:03,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015929546] [2021-01-06 10:01:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:03,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015929546] [2021-01-06 10:01:03,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133153471] [2021-01-06 10:01:03,447 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 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 [2021-01-06 10:01:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:03,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:01:03,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:03,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:03,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:01:03,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885086421] [2021-01-06 10:01:03,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:01:03,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:03,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:01:03,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:01:03,564 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2021-01-06 10:01:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:03,590 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-01-06 10:01:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:01:03,591 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2021-01-06 10:01:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:03,592 INFO L225 Difference]: With dead ends: 25 [2021-01-06 10:01:03,592 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 10:01:03,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:01:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 10:01:03,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 10:01:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:01:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 10:01:03,597 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2021-01-06 10:01:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:03,597 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 10:01:03,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:01:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 10:01:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:01:03,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:03,598 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:03,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:03,813 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:03,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1297738320, now seen corresponding path program 8 times [2021-01-06 10:01:03,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:03,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82944980] [2021-01-06 10:01:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:03,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82944980] [2021-01-06 10:01:03,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475800812] [2021-01-06 10:01:03,930 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 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 [2021-01-06 10:01:03,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:03,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:03,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:01:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:04,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:04,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:01:04,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801536859] [2021-01-06 10:01:04,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:01:04,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:04,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:01:04,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:01:04,047 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2021-01-06 10:01:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:04,071 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-01-06 10:01:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:01:04,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2021-01-06 10:01:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:04,073 INFO L225 Difference]: With dead ends: 26 [2021-01-06 10:01:04,073 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 10:01:04,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:01:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 10:01:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 10:01:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:01:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-01-06 10:01:04,078 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-01-06 10:01:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:04,079 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-01-06 10:01:04,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:01:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-01-06 10:01:04,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:01:04,080 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:04,080 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:04,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:01:04,295 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:04,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1626658187, now seen corresponding path program 9 times [2021-01-06 10:01:04,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:04,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129086700] [2021-01-06 10:01:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:04,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129086700] [2021-01-06 10:01:04,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290718227] [2021-01-06 10:01:04,483 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 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 [2021-01-06 10:01:04,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:01:04,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:04,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:01:04,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:04,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:04,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:01:04,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008543865] [2021-01-06 10:01:04,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:01:04,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:04,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:01:04,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:01:04,658 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 13 states. [2021-01-06 10:01:04,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:04,686 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-01-06 10:01:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:01:04,687 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2021-01-06 10:01:04,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:04,688 INFO L225 Difference]: With dead ends: 27 [2021-01-06 10:01:04,688 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 10:01:04,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:01:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 10:01:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 10:01:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 10:01:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-01-06 10:01:04,692 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2021-01-06 10:01:04,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:04,693 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-01-06 10:01:04,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:01:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-01-06 10:01:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:01:04,694 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:04,694 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:04,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:04,910 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:04,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:04,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1061727824, now seen corresponding path program 10 times [2021-01-06 10:01:04,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:04,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401700872] [2021-01-06 10:01:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:05,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401700872] [2021-01-06 10:01:05,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576205299] [2021-01-06 10:01:05,044 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 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 [2021-01-06 10:01:05,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:01:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:05,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:05,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:01:05,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345395989] [2021-01-06 10:01:05,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:01:05,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:05,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:01:05,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:01:05,149 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2021-01-06 10:01:05,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:05,176 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-01-06 10:01:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:01:05,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 10:01:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:05,177 INFO L225 Difference]: With dead ends: 28 [2021-01-06 10:01:05,177 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 10:01:05,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:01:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 10:01:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 10:01:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 10:01:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 10:01:05,182 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2021-01-06 10:01:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:05,183 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 10:01:05,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:01:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 10:01:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 10:01:05,184 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:05,184 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:05,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:05,398 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:05,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1497651755, now seen corresponding path program 11 times [2021-01-06 10:01:05,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:05,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158528929] [2021-01-06 10:01:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:05,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158528929] [2021-01-06 10:01:05,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16374198] [2021-01-06 10:01:05,567 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 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 [2021-01-06 10:01:05,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 10:01:05,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:05,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:01:05,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:05,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:05,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:01:05,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78803560] [2021-01-06 10:01:05,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:01:05,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:05,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:01:05,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:01:05,792 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 15 states. [2021-01-06 10:01:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:05,847 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-01-06 10:01:05,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:01:05,848 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 10:01:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:05,849 INFO L225 Difference]: With dead ends: 29 [2021-01-06 10:01:05,849 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 10:01:05,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:01:05,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 10:01:05,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 10:01:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 10:01:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-01-06 10:01:05,854 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-01-06 10:01:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:05,854 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-01-06 10:01:05,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:01:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-01-06 10:01:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:01:05,855 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:05,855 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:06,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:01:06,069 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:06,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:06,070 INFO L82 PathProgramCache]: Analyzing trace with hash -765959920, now seen corresponding path program 12 times [2021-01-06 10:01:06,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:06,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740938741] [2021-01-06 10:01:06,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:06,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740938741] [2021-01-06 10:01:06,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800654189] [2021-01-06 10:01:06,299 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 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 [2021-01-06 10:01:06,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:01:06,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:06,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:01:06,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:06,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:06,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:01:06,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044782765] [2021-01-06 10:01:06,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:01:06,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:06,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:01:06,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:01:06,639 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 16 states. [2021-01-06 10:01:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:06,671 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-01-06 10:01:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:01:06,671 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2021-01-06 10:01:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:06,672 INFO L225 Difference]: With dead ends: 30 [2021-01-06 10:01:06,672 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 10:01:06,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:01:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 10:01:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 10:01:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:01:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-01-06 10:01:06,678 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2021-01-06 10:01:06,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:06,678 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-01-06 10:01:06,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:01:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-01-06 10:01:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:01:06,679 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:06,679 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:06,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:01:06,886 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:06,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2076522187, now seen corresponding path program 13 times [2021-01-06 10:01:06,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:06,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176835277] [2021-01-06 10:01:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:07,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176835277] [2021-01-06 10:01:07,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93003216] [2021-01-06 10:01:07,064 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 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 [2021-01-06 10:01:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:01:07,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:07,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:07,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:01:07,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382919986] [2021-01-06 10:01:07,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:01:07,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:07,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:01:07,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:01:07,213 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2021-01-06 10:01:07,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:07,255 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-01-06 10:01:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:01:07,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2021-01-06 10:01:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:07,256 INFO L225 Difference]: With dead ends: 31 [2021-01-06 10:01:07,256 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 10:01:07,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:01:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 10:01:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 10:01:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:01:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-01-06 10:01:07,262 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2021-01-06 10:01:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:07,262 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-01-06 10:01:07,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:01:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-01-06 10:01:07,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:01:07,263 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:07,263 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:07,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:01:07,480 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:07,482 INFO L82 PathProgramCache]: Analyzing trace with hash -845712, now seen corresponding path program 14 times [2021-01-06 10:01:07,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:07,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304778704] [2021-01-06 10:01:07,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:07,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304778704] [2021-01-06 10:01:07,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786323952] [2021-01-06 10:01:07,724 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 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 [2021-01-06 10:01:07,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:07,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:07,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:01:07,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:07,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:07,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 10:01:07,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960410391] [2021-01-06 10:01:07,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:01:07,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:01:07,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:01:07,865 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 18 states. [2021-01-06 10:01:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:07,909 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-01-06 10:01:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:01:07,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2021-01-06 10:01:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:07,911 INFO L225 Difference]: With dead ends: 32 [2021-01-06 10:01:07,911 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 10:01:07,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:01:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 10:01:07,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 10:01:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 10:01:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-01-06 10:01:07,916 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2021-01-06 10:01:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:07,916 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-01-06 10:01:07,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:01:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-01-06 10:01:07,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:01:07,918 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:07,918 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:08,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:08,133 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:08,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:08,135 INFO L82 PathProgramCache]: Analyzing trace with hash 25258859, now seen corresponding path program 15 times [2021-01-06 10:01:08,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:08,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217307328] [2021-01-06 10:01:08,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:08,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217307328] [2021-01-06 10:01:08,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572492434] [2021-01-06 10:01:08,382 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 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 [2021-01-06 10:01:08,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 10:01:08,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:08,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:01:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:08,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:08,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:01:08,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271475928] [2021-01-06 10:01:08,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:01:08,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:08,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:01:08,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:01:08,847 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 19 states. [2021-01-06 10:01:08,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:08,879 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-01-06 10:01:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:01:08,879 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 10:01:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:08,881 INFO L225 Difference]: With dead ends: 33 [2021-01-06 10:01:08,881 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:01:08,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:01:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:01:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 10:01:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:01:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-01-06 10:01:08,890 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2021-01-06 10:01:08,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:08,891 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-01-06 10:01:08,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:01:08,891 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-01-06 10:01:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 10:01:08,897 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:08,897 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:09,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:01:09,111 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:09,112 INFO L82 PathProgramCache]: Analyzing trace with hash 834500560, now seen corresponding path program 16 times [2021-01-06 10:01:09,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:09,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242871770] [2021-01-06 10:01:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:09,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242871770] [2021-01-06 10:01:09,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932024797] [2021-01-06 10:01:09,459 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 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 [2021-01-06 10:01:09,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:09,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:09,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:01:09,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:09,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:09,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:01:09,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759403180] [2021-01-06 10:01:09,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:01:09,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:09,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:01:09,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:01:09,683 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2021-01-06 10:01:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:09,723 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-01-06 10:01:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:01:09,724 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 10:01:09,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:09,727 INFO L225 Difference]: With dead ends: 34 [2021-01-06 10:01:09,727 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:01:09,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:01:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:01:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 10:01:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:01:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 10:01:09,736 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2021-01-06 10:01:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:09,737 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 10:01:09,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:01:09,737 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 10:01:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 10:01:09,741 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:09,741 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:09,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:01:09,957 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:09,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:09,958 INFO L82 PathProgramCache]: Analyzing trace with hash 151189515, now seen corresponding path program 17 times [2021-01-06 10:01:09,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:09,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971382876] [2021-01-06 10:01:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:10,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971382876] [2021-01-06 10:01:10,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333680123] [2021-01-06 10:01:10,223 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 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 [2021-01-06 10:01:10,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 10:01:10,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:10,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:01:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:10,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:10,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 10:01:10,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993666130] [2021-01-06 10:01:10,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:01:10,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:10,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:01:10,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:01:10,809 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 21 states. [2021-01-06 10:01:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:10,856 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-01-06 10:01:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:01:10,857 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 10:01:10,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:10,858 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:01:10,858 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:01:10,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:01:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:01:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 10:01:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:01:10,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 10:01:10,863 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2021-01-06 10:01:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:10,863 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 10:01:10,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:01:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 10:01:10,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:01:10,864 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:10,864 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:11,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:01:11,080 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:11,081 INFO L82 PathProgramCache]: Analyzing trace with hash 443383600, now seen corresponding path program 18 times [2021-01-06 10:01:11,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:11,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662665060] [2021-01-06 10:01:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:11,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662665060] [2021-01-06 10:01:11,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640160464] [2021-01-06 10:01:11,380 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 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 [2021-01-06 10:01:12,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 10:01:12,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:12,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:01:12,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:12,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:12,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:01:12,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841261918] [2021-01-06 10:01:12,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:01:12,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:12,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:01:12,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:01:12,164 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 22 states. [2021-01-06 10:01:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:12,208 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-01-06 10:01:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:01:12,209 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2021-01-06 10:01:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:12,209 INFO L225 Difference]: With dead ends: 36 [2021-01-06 10:01:12,209 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:01:12,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:01:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:01:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 10:01:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:01:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-01-06 10:01:12,215 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2021-01-06 10:01:12,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:12,215 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-01-06 10:01:12,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:01:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-01-06 10:01:12,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:01:12,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:12,216 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:12,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:12,427 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:12,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:12,428 INFO L82 PathProgramCache]: Analyzing trace with hash 911465643, now seen corresponding path program 19 times [2021-01-06 10:01:12,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:12,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527591725] [2021-01-06 10:01:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:12,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527591725] [2021-01-06 10:01:12,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893749641] [2021-01-06 10:01:12,722 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 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 [2021-01-06 10:01:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:01:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:12,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:12,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 10:01:12,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804042891] [2021-01-06 10:01:12,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:01:12,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:01:12,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:01:12,859 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 23 states. [2021-01-06 10:01:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:12,891 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-01-06 10:01:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:01:12,892 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 10:01:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:12,892 INFO L225 Difference]: With dead ends: 37 [2021-01-06 10:01:12,893 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:01:12,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:01:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:01:12,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 10:01:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:01:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 10:01:12,898 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2021-01-06 10:01:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:12,898 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 10:01:12,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:01:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 10:01:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:01:12,899 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:12,899 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:13,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:13,108 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:13,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:13,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1757860208, now seen corresponding path program 20 times [2021-01-06 10:01:13,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:13,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942610923] [2021-01-06 10:01:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:13,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942610923] [2021-01-06 10:01:13,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386867591] [2021-01-06 10:01:13,455 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 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 [2021-01-06 10:01:13,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:13,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:13,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:01:13,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:13,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:13,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 10:01:13,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774876384] [2021-01-06 10:01:13,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:01:13,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:13,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:01:13,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:01:13,596 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 24 states. [2021-01-06 10:01:13,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:13,644 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-01-06 10:01:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 10:01:13,644 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2021-01-06 10:01:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:13,645 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:01:13,645 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:01:13,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:01:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:01:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 10:01:13,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:01:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-01-06 10:01:13,651 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2021-01-06 10:01:13,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:13,651 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-01-06 10:01:13,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:01:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-01-06 10:01:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:01:13,652 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:13,652 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:13,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:01:13,867 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:13,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1392384331, now seen corresponding path program 21 times [2021-01-06 10:01:13,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:13,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600136429] [2021-01-06 10:01:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:14,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600136429] [2021-01-06 10:01:14,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331910355] [2021-01-06 10:01:14,271 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 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 [2021-01-06 10:01:15,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 10:01:15,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:15,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:01:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:15,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:15,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 10:01:15,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533998102] [2021-01-06 10:01:15,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:01:15,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:15,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:01:15,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:01:15,490 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 25 states. [2021-01-06 10:01:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:15,544 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-01-06 10:01:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:01:15,545 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2021-01-06 10:01:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:15,545 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:01:15,545 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 10:01:15,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:01:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 10:01:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 10:01:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:01:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-01-06 10:01:15,553 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2021-01-06 10:01:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:15,553 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-01-06 10:01:15,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:01:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-01-06 10:01:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:01:15,554 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:15,554 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:15,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:01:15,769 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:15,770 INFO L82 PathProgramCache]: Analyzing trace with hash 265717232, now seen corresponding path program 22 times [2021-01-06 10:01:15,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:15,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810255756] [2021-01-06 10:01:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:16,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810255756] [2021-01-06 10:01:16,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265604253] [2021-01-06 10:01:16,152 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 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 [2021-01-06 10:01:16,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:16,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:16,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:01:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:16,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:16,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 10:01:16,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451264480] [2021-01-06 10:01:16,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:01:16,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:01:16,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:01:16,305 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 26 states. [2021-01-06 10:01:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:16,353 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-01-06 10:01:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:01:16,354 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2021-01-06 10:01:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:16,354 INFO L225 Difference]: With dead ends: 40 [2021-01-06 10:01:16,354 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:01:16,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:01:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:01:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 10:01:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:01:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 10:01:16,360 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2021-01-06 10:01:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:16,362 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 10:01:16,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:01:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 10:01:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:01:16,363 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:16,363 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:16,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:16,565 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:16,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:16,566 INFO L82 PathProgramCache]: Analyzing trace with hash -301224469, now seen corresponding path program 23 times [2021-01-06 10:01:16,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:16,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875849795] [2021-01-06 10:01:16,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:17,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875849795] [2021-01-06 10:01:17,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211574895] [2021-01-06 10:01:17,013 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 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 [2021-01-06 10:01:18,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 10:01:18,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:18,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:01:18,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:18,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:18,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 10:01:18,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925769313] [2021-01-06 10:01:18,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:01:18,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:18,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:01:18,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:01:18,189 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 27 states. [2021-01-06 10:01:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:18,236 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-01-06 10:01:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:01:18,237 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2021-01-06 10:01:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:18,238 INFO L225 Difference]: With dead ends: 41 [2021-01-06 10:01:18,238 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 10:01:18,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:01:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 10:01:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-01-06 10:01:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:01:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-01-06 10:01:18,243 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2021-01-06 10:01:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:18,243 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-01-06 10:01:18,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:01:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-01-06 10:01:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:01:18,244 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:18,244 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:18,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:01:18,458 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:18,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:18,458 INFO L82 PathProgramCache]: Analyzing trace with hash -696548016, now seen corresponding path program 24 times [2021-01-06 10:01:18,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:18,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091363895] [2021-01-06 10:01:18,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:18,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091363895] [2021-01-06 10:01:18,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374319496] [2021-01-06 10:01:18,967 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 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 [2021-01-06 10:01:20,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:01:20,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:01:20,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:20,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:20,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:01:20,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753541074] [2021-01-06 10:01:20,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:01:20,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:20,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:01:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:01:20,143 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 28 states. [2021-01-06 10:01:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:20,201 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-01-06 10:01:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:01:20,201 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2021-01-06 10:01:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:20,202 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:01:20,202 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 10:01:20,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:01:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 10:01:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 10:01:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 10:01:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-01-06 10:01:20,206 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2021-01-06 10:01:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:20,206 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-01-06 10:01:20,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:01:20,207 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-01-06 10:01:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:01:20,207 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:20,207 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:20,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:20,417 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:20,418 INFO L82 PathProgramCache]: Analyzing trace with hash -66676085, now seen corresponding path program 25 times [2021-01-06 10:01:20,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:20,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052443536] [2021-01-06 10:01:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:20,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052443536] [2021-01-06 10:01:20,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141356048] [2021-01-06 10:01:20,935 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 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 [2021-01-06 10:01:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:20,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:01:21,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:21,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:21,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:01:21,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389348493] [2021-01-06 10:01:21,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:01:21,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:21,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:01:21,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:01:21,090 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 29 states. [2021-01-06 10:01:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:21,138 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-01-06 10:01:21,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:01:21,139 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2021-01-06 10:01:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:21,139 INFO L225 Difference]: With dead ends: 43 [2021-01-06 10:01:21,139 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 10:01:21,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:01:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 10:01:21,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 10:01:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:01:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 10:01:21,143 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2021-01-06 10:01:21,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:21,143 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 10:01:21,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:01:21,144 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 10:01:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:01:21,144 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:21,144 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:21,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:01:21,345 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2015482704, now seen corresponding path program 26 times [2021-01-06 10:01:21,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:21,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862980154] [2021-01-06 10:01:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:21,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862980154] [2021-01-06 10:01:21,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511447862] [2021-01-06 10:01:21,886 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 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 [2021-01-06 10:01:21,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:21,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:21,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:01:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:22,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:22,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 10:01:22,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663931735] [2021-01-06 10:01:22,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:01:22,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:22,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:01:22,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:01:22,033 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 30 states. [2021-01-06 10:01:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:22,095 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-01-06 10:01:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:01:22,096 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2021-01-06 10:01:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:22,097 INFO L225 Difference]: With dead ends: 44 [2021-01-06 10:01:22,097 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 10:01:22,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:01:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 10:01:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-01-06 10:01:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 10:01:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-01-06 10:01:22,102 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2021-01-06 10:01:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:22,102 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-01-06 10:01:22,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:01:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-01-06 10:01:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 10:01:22,103 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:22,103 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:22,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:01:22,319 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:22,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1996021547, now seen corresponding path program 27 times [2021-01-06 10:01:22,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:22,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661069685] [2021-01-06 10:01:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:22,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661069685] [2021-01-06 10:01:22,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562870304] [2021-01-06 10:01:22,876 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 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 [2021-01-06 10:01:25,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 10:01:25,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:25,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:01:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:25,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:25,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 10:01:25,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953568574] [2021-01-06 10:01:25,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:01:25,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:25,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:01:25,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:01:25,495 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 31 states. [2021-01-06 10:01:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:25,550 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-01-06 10:01:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:01:25,551 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2021-01-06 10:01:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:25,551 INFO L225 Difference]: With dead ends: 45 [2021-01-06 10:01:25,551 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 10:01:25,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:01:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 10:01:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 10:01:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:01:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-01-06 10:01:25,555 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2021-01-06 10:01:25,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:25,556 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-01-06 10:01:25,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:01:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-01-06 10:01:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:01:25,556 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:25,557 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:25,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:01:25,773 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:25,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1798601744, now seen corresponding path program 28 times [2021-01-06 10:01:25,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:25,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337481771] [2021-01-06 10:01:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:26,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337481771] [2021-01-06 10:01:26,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626611092] [2021-01-06 10:01:26,453 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 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 [2021-01-06 10:01:26,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:26,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:26,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 10:01:26,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:26,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:26,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 10:01:26,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692872141] [2021-01-06 10:01:26,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:01:26,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:01:26,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:01:26,592 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 32 states. [2021-01-06 10:01:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:26,640 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-01-06 10:01:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 10:01:26,640 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2021-01-06 10:01:26,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:26,641 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:01:26,641 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 10:01:26,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:01:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 10:01:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 10:01:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:01:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 10:01:26,645 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2021-01-06 10:01:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:26,646 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 10:01:26,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:01:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 10:01:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:01:26,646 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:26,646 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:26,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:01:26,860 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:26,860 INFO L82 PathProgramCache]: Analyzing trace with hash -26444853, now seen corresponding path program 29 times [2021-01-06 10:01:26,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:26,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592428285] [2021-01-06 10:01:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:27,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592428285] [2021-01-06 10:01:27,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411926289] [2021-01-06 10:01:27,539 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 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 [2021-01-06 10:01:29,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-01-06 10:01:29,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:01:29,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:29,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:29,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 10:01:29,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26775783] [2021-01-06 10:01:29,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:01:29,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:29,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:01:29,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:01:29,799 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 33 states. [2021-01-06 10:01:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:29,858 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-01-06 10:01:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:01:29,858 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2021-01-06 10:01:29,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:29,859 INFO L225 Difference]: With dead ends: 47 [2021-01-06 10:01:29,859 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 10:01:29,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:01:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 10:01:29,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 10:01:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 10:01:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-01-06 10:01:29,867 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2021-01-06 10:01:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:29,867 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-01-06 10:01:29,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:01:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-01-06 10:01:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 10:01:29,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:29,869 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:30,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:30,084 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:30,085 INFO L82 PathProgramCache]: Analyzing trace with hash -768314512, now seen corresponding path program 30 times [2021-01-06 10:01:30,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:30,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475157156] [2021-01-06 10:01:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:30,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475157156] [2021-01-06 10:01:30,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052924895] [2021-01-06 10:01:30,834 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 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 [2021-01-06 10:01:35,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-01-06 10:01:35,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:35,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:01:35,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:35,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:35,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 10:01:35,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583920076] [2021-01-06 10:01:35,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:01:35,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:01:35,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:01:35,583 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 34 states. [2021-01-06 10:01:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:35,632 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-01-06 10:01:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:01:35,632 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2021-01-06 10:01:35,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:35,633 INFO L225 Difference]: With dead ends: 48 [2021-01-06 10:01:35,633 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:01:35,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:01:35,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:01:35,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 10:01:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 10:01:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-01-06 10:01:35,638 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2021-01-06 10:01:35,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:35,638 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-01-06 10:01:35,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:01:35,639 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-01-06 10:01:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 10:01:35,639 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:35,639 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:35,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:35,854 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:35,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:35,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2003529835, now seen corresponding path program 31 times [2021-01-06 10:01:35,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:35,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616777067] [2021-01-06 10:01:35,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:36,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616777067] [2021-01-06 10:01:36,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948276915] [2021-01-06 10:01:36,564 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 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 [2021-01-06 10:01:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:36,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:01:36,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:36,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:36,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 10:01:36,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750432507] [2021-01-06 10:01:36,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:01:36,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:01:36,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:01:36,735 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 35 states. [2021-01-06 10:01:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:36,802 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-01-06 10:01:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:01:36,803 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2021-01-06 10:01:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:36,804 INFO L225 Difference]: With dead ends: 49 [2021-01-06 10:01:36,804 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 10:01:36,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:01:36,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 10:01:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 10:01:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 10:01:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-01-06 10:01:36,813 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2021-01-06 10:01:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:36,813 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-01-06 10:01:36,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:01:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-01-06 10:01:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 10:01:36,814 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:36,814 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:37,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:37,029 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:37,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2031358672, now seen corresponding path program 32 times [2021-01-06 10:01:37,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:37,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630631900] [2021-01-06 10:01:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:37,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630631900] [2021-01-06 10:01:37,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556299220] [2021-01-06 10:01:37,810 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 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 [2021-01-06 10:01:37,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:37,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:37,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 10:01:37,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:37,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:37,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 10:01:37,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709888524] [2021-01-06 10:01:37,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:01:37,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:37,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:01:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:01:37,992 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2021-01-06 10:01:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:38,069 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-01-06 10:01:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 10:01:38,070 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2021-01-06 10:01:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:38,070 INFO L225 Difference]: With dead ends: 50 [2021-01-06 10:01:38,071 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 10:01:38,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:01:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 10:01:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 10:01:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 10:01:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-01-06 10:01:38,075 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2021-01-06 10:01:38,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:38,075 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-01-06 10:01:38,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:01:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-01-06 10:01:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 10:01:38,075 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:38,076 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:38,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:01:38,290 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:38,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:38,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1400914677, now seen corresponding path program 33 times [2021-01-06 10:01:38,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:38,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425832091] [2021-01-06 10:01:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:39,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425832091] [2021-01-06 10:01:39,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507656269] [2021-01-06 10:01:39,120 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 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 [2021-01-06 10:01:46,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 10:01:46,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:46,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 10:01:46,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:46,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:46,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 10:01:46,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77957001] [2021-01-06 10:01:46,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:01:46,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:46,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:01:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:01:46,921 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 37 states. [2021-01-06 10:01:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:46,983 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-01-06 10:01:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:01:46,984 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2021-01-06 10:01:46,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:46,984 INFO L225 Difference]: With dead ends: 51 [2021-01-06 10:01:46,985 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 10:01:46,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:01:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 10:01:46,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 10:01:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:01:46,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-01-06 10:01:46,997 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2021-01-06 10:01:46,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:46,997 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-01-06 10:01:46,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:01:46,997 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-01-06 10:01:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:01:46,997 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:46,998 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:47,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:47,207 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:47,208 INFO L82 PathProgramCache]: Analyzing trace with hash -427206096, now seen corresponding path program 34 times [2021-01-06 10:01:47,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:47,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800225680] [2021-01-06 10:01:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:47,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800225680] [2021-01-06 10:01:47,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775970497] [2021-01-06 10:01:47,993 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 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 [2021-01-06 10:01:48,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:48,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:48,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:01:48,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:48,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:48,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 10:01:48,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38895191] [2021-01-06 10:01:48,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 10:01:48,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:48,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 10:01:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:01:48,129 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 38 states. [2021-01-06 10:01:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:48,196 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-01-06 10:01:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:01:48,201 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2021-01-06 10:01:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:48,201 INFO L225 Difference]: With dead ends: 52 [2021-01-06 10:01:48,201 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 10:01:48,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:01:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 10:01:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 10:01:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 10:01:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-01-06 10:01:48,205 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2021-01-06 10:01:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:48,205 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-01-06 10:01:48,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 10:01:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-01-06 10:01:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:01:48,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:48,206 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:48,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:01:48,419 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash -307011157, now seen corresponding path program 35 times [2021-01-06 10:01:48,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:48,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597711473] [2021-01-06 10:01:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:49,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597711473] [2021-01-06 10:01:49,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184494963] [2021-01-06 10:01:49,265 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 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 [2021-01-06 10:01:55,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-06 10:01:55,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:55,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 10:01:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:55,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:55,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 10:01:55,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554269066] [2021-01-06 10:01:55,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 10:01:55,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:55,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 10:01:55,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:01:55,312 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 39 states. [2021-01-06 10:01:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:55,376 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-01-06 10:01:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 10:01:55,378 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2021-01-06 10:01:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:55,379 INFO L225 Difference]: With dead ends: 53 [2021-01-06 10:01:55,379 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 10:01:55,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:01:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 10:01:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 10:01:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:01:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-01-06 10:01:55,383 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2021-01-06 10:01:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:55,383 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-01-06 10:01:55,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 10:01:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-01-06 10:01:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 10:01:55,384 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:55,384 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:55,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:55,598 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:55,598 INFO L82 PathProgramCache]: Analyzing trace with hash -875935344, now seen corresponding path program 36 times [2021-01-06 10:01:55,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:55,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288617154] [2021-01-06 10:01:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:56,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288617154] [2021-01-06 10:01:56,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605404064] [2021-01-06 10:01:56,463 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 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 [2021-01-06 10:02:04,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:02:04,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:04,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:02:04,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:04,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:04,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 10:02:04,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495059525] [2021-01-06 10:02:04,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:02:04,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:04,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:02:04,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:02:04,898 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 40 states. [2021-01-06 10:02:04,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:04,950 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-01-06 10:02:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:02:04,950 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2021-01-06 10:02:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:04,951 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:02:04,951 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 10:02:04,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:02:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 10:02:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 10:02:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 10:02:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-01-06 10:02:04,955 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2021-01-06 10:02:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:04,955 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-01-06 10:02:04,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:02:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-01-06 10:02:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 10:02:04,956 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:04,956 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:05,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:02:05,170 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:05,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:05,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1332715957, now seen corresponding path program 37 times [2021-01-06 10:02:05,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:05,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256788797] [2021-01-06 10:02:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:06,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256788797] [2021-01-06 10:02:06,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707874344] [2021-01-06 10:02:06,194 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 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 [2021-01-06 10:02:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:06,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:02:06,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:06,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:06,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 10:02:06,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433665662] [2021-01-06 10:02:06,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:02:06,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:02:06,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:02:06,340 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 41 states. [2021-01-06 10:02:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:06,413 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-01-06 10:02:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:02:06,413 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2021-01-06 10:02:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:06,414 INFO L225 Difference]: With dead ends: 55 [2021-01-06 10:02:06,414 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 10:02:06,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:02:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 10:02:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 10:02:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:02:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-06 10:02:06,418 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-01-06 10:02:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:06,418 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-06 10:02:06,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:02:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-06 10:02:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:02:06,419 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:06,419 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:06,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:02:06,633 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:06,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1686954224, now seen corresponding path program 38 times [2021-01-06 10:02:06,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:06,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234503912] [2021-01-06 10:02:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:07,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234503912] [2021-01-06 10:02:07,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619029170] [2021-01-06 10:02:07,717 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 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 [2021-01-06 10:02:07,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:02:07,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:07,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 10:02:07,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:07,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:07,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 10:02:07,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258667177] [2021-01-06 10:02:07,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:02:07,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:07,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:02:07,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:02:07,876 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 42 states. [2021-01-06 10:02:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:07,928 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-01-06 10:02:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:02:07,929 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2021-01-06 10:02:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:07,929 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:02:07,929 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:02:07,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:02:07,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:02:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-01-06 10:02:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 10:02:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-01-06 10:02:07,934 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2021-01-06 10:02:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:07,934 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-01-06 10:02:07,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:02:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-01-06 10:02:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:02:07,935 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:07,935 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:08,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:02:08,151 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:08,152 INFO L82 PathProgramCache]: Analyzing trace with hash 807449323, now seen corresponding path program 39 times [2021-01-06 10:02:08,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:08,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543626091] [2021-01-06 10:02:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:09,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543626091] [2021-01-06 10:02:09,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901066884] [2021-01-06 10:02:09,187 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 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 [2021-01-06 10:02:27,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-01-06 10:02:27,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:27,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:02:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:27,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:27,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 10:02:27,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132050978] [2021-01-06 10:02:27,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 10:02:27,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:27,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 10:02:27,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:02:27,457 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 43 states. [2021-01-06 10:02:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:27,538 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-01-06 10:02:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:02:27,542 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2021-01-06 10:02:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:27,542 INFO L225 Difference]: With dead ends: 57 [2021-01-06 10:02:27,542 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 10:02:27,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:02:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 10:02:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 10:02:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 10:02:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-01-06 10:02:27,548 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2021-01-06 10:02:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:27,548 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-01-06 10:02:27,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 10:02:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-01-06 10:02:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:02:27,553 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:27,553 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:27,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:02:27,769 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:27,770 INFO L82 PathProgramCache]: Analyzing trace with hash -687398832, now seen corresponding path program 40 times [2021-01-06 10:02:27,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:27,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872307567] [2021-01-06 10:02:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:28,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872307567] [2021-01-06 10:02:28,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628847233] [2021-01-06 10:02:28,872 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 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 [2021-01-06 10:02:28,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:02:28,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:28,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 10:02:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:29,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:29,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 10:02:29,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630579856] [2021-01-06 10:02:29,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:02:29,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:29,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:02:29,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:02:29,027 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 44 states. [2021-01-06 10:02:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:29,101 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-01-06 10:02:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 10:02:29,102 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2021-01-06 10:02:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:29,103 INFO L225 Difference]: With dead ends: 58 [2021-01-06 10:02:29,103 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:02:29,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:02:29,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:02:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 10:02:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 10:02:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-01-06 10:02:29,107 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2021-01-06 10:02:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:29,107 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-01-06 10:02:29,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:02:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-01-06 10:02:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 10:02:29,108 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:29,108 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:29,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:02:29,322 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:29,322 INFO L82 PathProgramCache]: Analyzing trace with hash 216948619, now seen corresponding path program 41 times [2021-01-06 10:02:29,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:29,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990261106] [2021-01-06 10:02:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:30,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990261106] [2021-01-06 10:02:30,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968202320] [2021-01-06 10:02:30,435 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 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 [2021-01-06 10:02:42,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-01-06 10:02:42,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:42,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 10:02:42,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:42,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:42,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 10:02:42,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110217923] [2021-01-06 10:02:42,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 10:02:42,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:42,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 10:02:42,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:02:42,231 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 45 states. [2021-01-06 10:02:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:42,312 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-01-06 10:02:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:02:42,312 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2021-01-06 10:02:42,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:42,313 INFO L225 Difference]: With dead ends: 59 [2021-01-06 10:02:42,313 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 10:02:42,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:02:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 10:02:42,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-06 10:02:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:02:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-01-06 10:02:42,317 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2021-01-06 10:02:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:42,317 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-01-06 10:02:42,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 10:02:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-01-06 10:02:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:02:42,318 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:42,318 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:42,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 10:02:42,533 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:42,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1813051472, now seen corresponding path program 42 times [2021-01-06 10:02:42,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:42,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930239959] [2021-01-06 10:02:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:43,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930239959] [2021-01-06 10:02:43,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156235797] [2021-01-06 10:02:43,658 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 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 [2021-01-06 10:02:58,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-01-06 10:02:58,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:58,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 10:02:58,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:02:58,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:58,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 10:02:58,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676261844] [2021-01-06 10:02:58,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 10:02:58,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:58,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 10:02:58,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 10:02:58,842 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 46 states. [2021-01-06 10:02:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:58,924 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-01-06 10:02:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 10:02:58,924 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2021-01-06 10:02:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:58,925 INFO L225 Difference]: With dead ends: 60 [2021-01-06 10:02:58,925 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 10:02:58,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 10:02:58,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 10:02:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-01-06 10:02:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 10:02:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-01-06 10:02:58,929 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2021-01-06 10:02:58,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:58,930 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-01-06 10:02:58,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 10:02:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-01-06 10:02:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 10:02:58,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:58,931 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:59,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:02:59,146 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:59,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:59,146 INFO L82 PathProgramCache]: Analyzing trace with hash -318544853, now seen corresponding path program 43 times [2021-01-06 10:02:59,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:59,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183443429] [2021-01-06 10:02:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:03:00,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183443429] [2021-01-06 10:03:00,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877403858] [2021-01-06 10:03:00,436 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 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 [2021-01-06 10:03:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:00,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 10:03:00,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:03:00,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:00,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 10:03:00,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226313415] [2021-01-06 10:03:00,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:03:00,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:00,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:03:00,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:03:00,609 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 47 states. [2021-01-06 10:03:00,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:00,707 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-01-06 10:03:00,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 10:03:00,710 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2021-01-06 10:03:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:00,710 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:03:00,710 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 10:03:00,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:03:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 10:03:00,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-01-06 10:03:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:03:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-01-06 10:03:00,713 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2021-01-06 10:03:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:00,713 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-01-06 10:03:00,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:03:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-01-06 10:03:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:03:00,714 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:00,714 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:00,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:00,928 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:00,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1233479920, now seen corresponding path program 44 times [2021-01-06 10:03:00,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:00,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329254278] [2021-01-06 10:03:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:03:02,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329254278] [2021-01-06 10:03:02,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131372313] [2021-01-06 10:03:02,364 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 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 [2021-01-06 10:03:02,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:03:02,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:02,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 10:03:02,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:03:02,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:02,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 10:03:02,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803924496] [2021-01-06 10:03:02,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 10:03:02,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:02,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 10:03:02,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:03:02,538 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 48 states. [2021-01-06 10:03:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:02,625 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-01-06 10:03:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:03:02,626 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2021-01-06 10:03:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:02,627 INFO L225 Difference]: With dead ends: 62 [2021-01-06 10:03:02,627 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 10:03:02,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:03:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 10:03:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-01-06 10:03:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 10:03:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-01-06 10:03:02,630 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2021-01-06 10:03:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:02,630 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-01-06 10:03:02,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 10:03:02,630 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-01-06 10:03:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 10:03:02,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:02,631 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:02,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 10:03:02,832 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:02,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:02,832 INFO L82 PathProgramCache]: Analyzing trace with hash 468304075, now seen corresponding path program 45 times [2021-01-06 10:03:02,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:02,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783361863] [2021-01-06 10:03:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:03:04,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783361863] [2021-01-06 10:03:04,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758168371] [2021-01-06 10:03:04,287 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 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 [2021-01-06 10:03:36,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-01-06 10:03:36,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 10:03:36,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:03:36,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:36,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 10:03:36,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838391631] [2021-01-06 10:03:36,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 10:03:36,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:36,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 10:03:36,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:03:36,583 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 49 states. [2021-01-06 10:03:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:36,663 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-01-06 10:03:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 10:03:36,664 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 52 [2021-01-06 10:03:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:36,664 INFO L225 Difference]: With dead ends: 63 [2021-01-06 10:03:36,664 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 10:03:36,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:03:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 10:03:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-06 10:03:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:03:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-01-06 10:03:36,667 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2021-01-06 10:03:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:36,667 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-01-06 10:03:36,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 10:03:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-01-06 10:03:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 10:03:36,668 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:36,668 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:36,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 10:03:36,869 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:36,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:36,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1684000368, now seen corresponding path program 46 times [2021-01-06 10:03:36,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:36,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806762130] [2021-01-06 10:03:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:03:38,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806762130] [2021-01-06 10:03:38,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934850097] [2021-01-06 10:03:38,334 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 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 [2021-01-06 10:03:38,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:03:38,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:38,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 10:03:38,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:03:38,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:38,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 10:03:38,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674367012] [2021-01-06 10:03:38,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 10:03:38,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:38,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 10:03:38,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 10:03:38,506 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 50 states. [2021-01-06 10:03:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:38,604 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-01-06 10:03:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 10:03:38,605 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2021-01-06 10:03:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:38,606 INFO L225 Difference]: With dead ends: 64 [2021-01-06 10:03:38,606 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 10:03:38,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 10:03:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 10:03:38,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 10:03:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 10:03:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-01-06 10:03:38,609 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2021-01-06 10:03:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:38,609 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-01-06 10:03:38,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 10:03:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-01-06 10:03:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 10:03:38,610 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:38,610 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:38,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 10:03:38,818 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:38,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash 715879787, now seen corresponding path program 47 times [2021-01-06 10:03:38,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:38,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758819512] [2021-01-06 10:03:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:03:40,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758819512] [2021-01-06 10:03:40,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595501195] [2021-01-06 10:03:40,434 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 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 [2021-01-06 10:04:02,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-01-06 10:04:02,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:04:03,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 10:04:03,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:04:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:04:03,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:04:03,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 10:04:03,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825147876] [2021-01-06 10:04:03,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 10:04:03,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:04:03,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 10:04:03,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:04:03,106 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 51 states. [2021-01-06 10:04:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:04:03,217 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-01-06 10:04:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 10:04:03,217 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 54 [2021-01-06 10:04:03,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:04:03,218 INFO L225 Difference]: With dead ends: 65 [2021-01-06 10:04:03,218 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 10:04:03,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:04:03,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 10:04:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-01-06 10:04:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 10:04:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-01-06 10:04:03,222 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 54 [2021-01-06 10:04:03,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:04:03,226 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-01-06 10:04:03,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 10:04:03,227 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-01-06 10:04:03,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:04:03,227 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:04:03,227 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:04:03,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:04:03,428 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:04:03,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:04:03,429 INFO L82 PathProgramCache]: Analyzing trace with hash 768912848, now seen corresponding path program 48 times [2021-01-06 10:04:03,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:04:03,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292974551] [2021-01-06 10:04:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:04:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:04:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:04:05,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292974551] [2021-01-06 10:04:05,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800121930] [2021-01-06 10:04:05,130 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 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 [2021-01-06 10:04:39,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 10:04:39,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:04:39,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 10:04:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:04:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:04:39,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:04:39,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 10:04:39,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817654783] [2021-01-06 10:04:39,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 10:04:39,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:04:39,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 10:04:39,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:04:39,329 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 52 states. [2021-01-06 10:04:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:04:39,434 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-01-06 10:04:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 10:04:39,435 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2021-01-06 10:04:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:04:39,435 INFO L225 Difference]: With dead ends: 66 [2021-01-06 10:04:39,435 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 10:04:39,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:04:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 10:04:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-06 10:04:39,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:04:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-01-06 10:04:39,438 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 55 [2021-01-06 10:04:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:04:39,439 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-01-06 10:04:39,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 10:04:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-01-06 10:04:39,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:04:39,439 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:04:39,439 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:04:39,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 10:04:39,640 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:04:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:04:39,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1882029557, now seen corresponding path program 49 times [2021-01-06 10:04:39,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:04:39,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874736514] [2021-01-06 10:04:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:04:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:04:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:04:41,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874736514] [2021-01-06 10:04:41,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263643023] [2021-01-06 10:04:41,392 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 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 [2021-01-06 10:04:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:04:41,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 10:04:41,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:04:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:04:41,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:04:41,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 10:04:41,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784208025] [2021-01-06 10:04:41,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 10:04:41,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:04:41,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 10:04:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:04:41,572 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 53 states. [2021-01-06 10:04:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:04:41,663 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-01-06 10:04:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 10:04:41,664 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 56 [2021-01-06 10:04:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:04:41,665 INFO L225 Difference]: With dead ends: 67 [2021-01-06 10:04:41,665 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 10:04:41,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:04:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 10:04:41,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 10:04:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 10:04:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-01-06 10:04:41,667 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2021-01-06 10:04:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:04:41,667 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-01-06 10:04:41,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 10:04:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-01-06 10:04:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 10:04:41,668 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:04:41,668 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:04:41,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 10:04:41,882 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:04:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:04:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1838101808, now seen corresponding path program 50 times [2021-01-06 10:04:41,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:04:41,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540101597] [2021-01-06 10:04:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:04:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:04:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:04:43,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540101597] [2021-01-06 10:04:43,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953970609] [2021-01-06 10:04:43,631 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 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 [2021-01-06 10:04:43,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:04:43,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:04:43,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 10:04:43,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:04:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:04:43,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:04:43,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 10:04:43,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126988581] [2021-01-06 10:04:43,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 10:04:43,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:04:43,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 10:04:43,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:04:43,819 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 54 states. [2021-01-06 10:04:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:04:43,934 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-01-06 10:04:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 10:04:43,935 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 57 [2021-01-06 10:04:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:04:43,936 INFO L225 Difference]: With dead ends: 68 [2021-01-06 10:04:43,936 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 10:04:43,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:04:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 10:04:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-01-06 10:04:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 10:04:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-01-06 10:04:43,939 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2021-01-06 10:04:43,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:04:43,940 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-01-06 10:04:43,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 10:04:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-01-06 10:04:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:04:43,940 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:04:43,941 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:04:44,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:04:44,158 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:04:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:04:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1198057131, now seen corresponding path program 51 times [2021-01-06 10:04:44,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:04:44,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20946821] [2021-01-06 10:04:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:04:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:04:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:04:46,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20946821] [2021-01-06 10:04:46,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135218352] [2021-01-06 10:04:46,021 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true