/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/reducercommutativity/sum60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:19:21,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:19:21,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:19:21,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:19:21,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:19:21,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:19:21,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:19:21,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:19:21,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:19:21,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:19:21,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:19:21,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:19:21,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:19:21,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:19:21,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:19:21,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:19:21,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:19:21,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:19:21,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:19:21,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:19:21,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:19:21,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:19:21,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:19:21,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:19:21,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:19:21,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:19:21,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:19:21,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:19:21,885 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 10:19:21,914 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:19:21,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:19:21,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:19:21,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:19:21,916 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:19:21,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:19:21,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:19:21,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:19:21,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:19:21,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:19:21,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:19:21,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:19:21,918 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:19:21,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:19:21,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:19:21,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:19:21,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:19:21,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:19:21,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:19:21,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:19:21,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:19:21,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:19:21,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:19:21,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:19:21,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:19:21,921 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:19:22,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:19:22,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:19:22,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:19:22,338 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:19:22,338 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:19:22,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sum60-2.i [2021-01-06 10:19:22,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c39c741ad/b40444b8ffe640878fc6b2a6049470de/FLAGc3dbaf693 [2021-01-06 10:19:23,117 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:19:23,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum60-2.i [2021-01-06 10:19:23,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c39c741ad/b40444b8ffe640878fc6b2a6049470de/FLAGc3dbaf693 [2021-01-06 10:19:23,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c39c741ad/b40444b8ffe640878fc6b2a6049470de [2021-01-06 10:19:23,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:19:23,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:19:23,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:19:23,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:19:23,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:19:23,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:19:23" (1/1) ... [2021-01-06 10:19:23,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131ab49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23, skipping insertion in model container [2021-01-06 10:19:23,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:19:23" (1/1) ... [2021-01-06 10:19:23,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:19:23,533 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[59]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:19:23,711 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/reducercommutativity/sum60-2.i[1277,1290] [2021-01-06 10:19:23,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:19:23,723 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[236],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:19:23,747 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/reducercommutativity/sum60-2.i[1277,1290] [2021-01-06 10:19:23,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:19:23,766 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:19:23,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23 WrapperNode [2021-01-06 10:19:23,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:19:23,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:19:23,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:19:23,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:19:23,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23" (1/1) ... [2021-01-06 10:19:23,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23" (1/1) ... [2021-01-06 10:19:23,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:19:23,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:19:23,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:19:23,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:19:23,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23" (1/1) ... [2021-01-06 10:19:23,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23" (1/1) ... [2021-01-06 10:19:23,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23" (1/1) ... [2021-01-06 10:19:23,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23" (1/1) ... [2021-01-06 10:19:23,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23" (1/1) ... [2021-01-06 10:19:23,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23" (1/1) ... [2021-01-06 10:19:23,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23" (1/1) ... [2021-01-06 10:19:23,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:19:23,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:19:23,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:19:23,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:19:23,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23" (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 10:19:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:19:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:19:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:19:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:19:23,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:19:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:19:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:19:24,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:19:24,351 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 10:19:24,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:19:24 BoogieIcfgContainer [2021-01-06 10:19:24,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:19:24,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:19:24,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:19:24,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:19:24,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:19:23" (1/3) ... [2021-01-06 10:19:24,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5cebd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:19:24, skipping insertion in model container [2021-01-06 10:19:24,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:19:23" (2/3) ... [2021-01-06 10:19:24,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5cebd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:19:24, skipping insertion in model container [2021-01-06 10:19:24,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:19:24" (3/3) ... [2021-01-06 10:19:24,377 INFO L111 eAbstractionObserver]: Analyzing ICFG sum60-2.i [2021-01-06 10:19:24,388 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:19:24,394 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:19:24,419 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:19:24,466 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:19:24,468 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:19:24,468 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:19:24,469 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:19:24,469 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:19:24,469 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:19:24,469 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:19:24,469 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:19:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-01-06 10:19:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:19:24,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:24,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:24,499 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:24,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-01-06 10:19:24,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:24,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549502837] [2021-01-06 10:19:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:24,821 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 10:19:24,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549502837] [2021-01-06 10:19:24,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:19:24,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:19:24,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402784301] [2021-01-06 10:19:24,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:19:24,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:24,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:19:24,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:19:24,859 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2021-01-06 10:19:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:24,934 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 10:19:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:19:24,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:19:24,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:24,954 INFO L225 Difference]: With dead ends: 52 [2021-01-06 10:19:24,955 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 10:19:24,958 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 10:19:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 10:19:24,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 10:19:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:19:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 10:19:25,001 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-01-06 10:19:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:25,002 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 10:19:25,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:19:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 10:19:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:19:25,004 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:25,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:25,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:19:25,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:25,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:25,008 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-01-06 10:19:25,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:25,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056003299] [2021-01-06 10:19:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:25,114 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 10:19:25,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056003299] [2021-01-06 10:19:25,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679902240] [2021-01-06 10:19:25,115 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 10:19:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:25,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:19:25,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:19:25,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:19:25,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:19:25,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637992762] [2021-01-06 10:19:25,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:19:25,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:25,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:19:25,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:19:25,272 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2021-01-06 10:19:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:25,336 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 10:19:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:19:25,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:19:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:25,338 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:19:25,338 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:19:25,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:19:25,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:19:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-01-06 10:19:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:19:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-01-06 10:19:25,354 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-01-06 10:19:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:25,359 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-01-06 10:19:25,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:19:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-01-06 10:19:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:19:25,360 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:25,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:25,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:19:25,579 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-01-06 10:19:25,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:25,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350399538] [2021-01-06 10:19:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:19:25,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350399538] [2021-01-06 10:19:25,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872436061] [2021-01-06 10:19:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:25,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:19:25,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:19:25,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:19:25,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:19:25,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422410575] [2021-01-06 10:19:25,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:19:25,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:25,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:19:25,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:19:25,756 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2021-01-06 10:19:25,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:25,770 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-01-06 10:19:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:19:25,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-01-06 10:19:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:25,772 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:19:25,772 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:19:25,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:19:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:19:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-01-06 10:19:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:19:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-06 10:19:25,779 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-01-06 10:19:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:25,779 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-06 10:19:25,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:19:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-06 10:19:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:19:25,781 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:25,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:25,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:25,996 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:25,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-01-06 10:19:25,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:25,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573687163] [2021-01-06 10:19:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:19:26,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573687163] [2021-01-06 10:19:26,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307188049] [2021-01-06 10:19:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:26,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:19:26,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:19:26,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:26,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:19:26,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796327085] [2021-01-06 10:19:26,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:19:26,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:26,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:19:26,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:19:26,234 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2021-01-06 10:19:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:26,258 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-01-06 10:19:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:19:26,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2021-01-06 10:19:26,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:26,260 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:19:26,260 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:19:26,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 10:19:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:19:26,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 10:19:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:19:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 10:19:26,267 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2021-01-06 10:19:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:26,267 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 10:19:26,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:19:26,267 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 10:19:26,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:19:26,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:26,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:26,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:26,484 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:26,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2021-01-06 10:19:26,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:26,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345579467] [2021-01-06 10:19:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:19:26,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345579467] [2021-01-06 10:19:26,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026551872] [2021-01-06 10:19:26,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:26,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:19:26,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:26,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:19:26,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:19:26,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:26,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:19:26,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136241747] [2021-01-06 10:19:26,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:19:26,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:26,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:19:26,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:19:26,661 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2021-01-06 10:19:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:26,724 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-01-06 10:19:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:19:26,725 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-01-06 10:19:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:26,725 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:19:26,726 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 10:19:26,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:19:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 10:19:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-01-06 10:19:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:19:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 10:19:26,733 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-01-06 10:19:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:26,733 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 10:19:26,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:19:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 10:19:26,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 10:19:26,735 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:26,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:26,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:26,949 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:26,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:26,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2021-01-06 10:19:26,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:26,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004512448] [2021-01-06 10:19:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:19:27,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004512448] [2021-01-06 10:19:27,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758632563] [2021-01-06 10:19:27,021 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 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 10:19:27,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:19:27,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:27,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:19:27,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:19:27,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:27,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 10:19:27,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801378426] [2021-01-06 10:19:27,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:19:27,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:27,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:19:27,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:19:27,162 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2021-01-06 10:19:27,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:27,244 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-01-06 10:19:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:19:27,245 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2021-01-06 10:19:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:27,246 INFO L225 Difference]: With dead ends: 81 [2021-01-06 10:19:27,246 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 10:19:27,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:19:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 10:19:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-01-06 10:19:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:19:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-01-06 10:19:27,254 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2021-01-06 10:19:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:27,255 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-01-06 10:19:27,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:19:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-01-06 10:19:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:19:27,256 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:27,256 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:27,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:19:27,471 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:27,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:27,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2021-01-06 10:19:27,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:27,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783310889] [2021-01-06 10:19:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:19:27,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783310889] [2021-01-06 10:19:27,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560734742] [2021-01-06 10:19:27,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:27,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:19:27,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:27,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:19:27,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:19:27,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:27,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:19:27,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514851085] [2021-01-06 10:19:27,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:19:27,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:27,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:19:27,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:19:27,750 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2021-01-06 10:19:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:27,772 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-01-06 10:19:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:19:27,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2021-01-06 10:19:27,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:27,774 INFO L225 Difference]: With dead ends: 86 [2021-01-06 10:19:27,775 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:19:27,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 10:19:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:19:27,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 10:19:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:19:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-01-06 10:19:27,781 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2021-01-06 10:19:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:27,782 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-01-06 10:19:27,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:19:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-01-06 10:19:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:19:27,783 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:27,783 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:27,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:27,997 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2021-01-06 10:19:27,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:27,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538430140] [2021-01-06 10:19:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:19:28,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538430140] [2021-01-06 10:19:28,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959568230] [2021-01-06 10:19:28,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:28,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:19:28,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:28,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:19:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 10:19:28,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:28,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 10:19:28,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743815948] [2021-01-06 10:19:28,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:19:28,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:28,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:19:28,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:19:28,283 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2021-01-06 10:19:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:28,407 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-01-06 10:19:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:19:28,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2021-01-06 10:19:28,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:28,410 INFO L225 Difference]: With dead ends: 97 [2021-01-06 10:19:28,412 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 10:19:28,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:19:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 10:19:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-01-06 10:19:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:19:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-01-06 10:19:28,433 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2021-01-06 10:19:28,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:28,434 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-01-06 10:19:28,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:19:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-01-06 10:19:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:19:28,436 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:28,436 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:28,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:28,651 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:28,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:28,652 INFO L82 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2021-01-06 10:19:28,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:28,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720020357] [2021-01-06 10:19:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 10:19:28,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720020357] [2021-01-06 10:19:28,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169398335] [2021-01-06 10:19:28,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:29,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:19:29,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:29,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:19:29,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:19:29,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:29,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-01-06 10:19:29,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150965522] [2021-01-06 10:19:29,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:19:29,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:29,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:19:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:19:29,195 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2021-01-06 10:19:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:29,254 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-01-06 10:19:29,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:19:29,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2021-01-06 10:19:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:29,255 INFO L225 Difference]: With dead ends: 105 [2021-01-06 10:19:29,255 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 10:19:29,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:19:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 10:19:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-01-06 10:19:29,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 10:19:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-01-06 10:19:29,262 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2021-01-06 10:19:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:29,262 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-01-06 10:19:29,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:19:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-01-06 10:19:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:19:29,263 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:29,263 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:29,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:19:29,478 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2021-01-06 10:19:29,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:29,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463125681] [2021-01-06 10:19:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:19:29,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463125681] [2021-01-06 10:19:29,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688416660] [2021-01-06 10:19:29,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:29,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:19:29,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:19:29,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:29,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:19:29,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667797020] [2021-01-06 10:19:29,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:19:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:19:29,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:19:29,741 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2021-01-06 10:19:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:29,778 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-01-06 10:19:29,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:19:29,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2021-01-06 10:19:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:29,779 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:19:29,779 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 10:19:29,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 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 10:19:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 10:19:29,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-01-06 10:19:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 10:19:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-01-06 10:19:29,786 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2021-01-06 10:19:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:29,786 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-01-06 10:19:29,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:19:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-01-06 10:19:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:19:29,787 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:29,788 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:30,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:30,002 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:30,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2021-01-06 10:19:30,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:30,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834841770] [2021-01-06 10:19:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:19:30,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834841770] [2021-01-06 10:19:30,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818491291] [2021-01-06 10:19:30,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:30,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:19:30,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:30,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:19:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:19:30,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:30,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:19:30,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677066006] [2021-01-06 10:19:30,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:19:30,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:30,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:19:30,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:19:30,381 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2021-01-06 10:19:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:30,415 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2021-01-06 10:19:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:19:30,416 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2021-01-06 10:19:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:30,416 INFO L225 Difference]: With dead ends: 110 [2021-01-06 10:19:30,417 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 10:19:30,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 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 10:19:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 10:19:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-01-06 10:19:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:19:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-01-06 10:19:30,423 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2021-01-06 10:19:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:30,423 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-01-06 10:19:30,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:19:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-01-06 10:19:30,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:19:30,424 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:30,424 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:30,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:30,638 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:30,640 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2021-01-06 10:19:30,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:30,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337217181] [2021-01-06 10:19:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:19:30,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337217181] [2021-01-06 10:19:30,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906723259] [2021-01-06 10:19:30,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:30,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:19:30,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:30,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:19:30,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 10:19:30,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:30,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-01-06 10:19:30,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74932949] [2021-01-06 10:19:30,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:19:31,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:31,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:19:31,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:19:31,001 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 15 states. [2021-01-06 10:19:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:31,096 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-01-06 10:19:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:19:31,096 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2021-01-06 10:19:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:31,097 INFO L225 Difference]: With dead ends: 115 [2021-01-06 10:19:31,097 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 10:19:31,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:19:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 10:19:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-01-06 10:19:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:19:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-01-06 10:19:31,111 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2021-01-06 10:19:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:31,112 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-01-06 10:19:31,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:19:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-01-06 10:19:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 10:19:31,117 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:31,118 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:31,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:19:31,333 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:31,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2021-01-06 10:19:31,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:31,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452977151] [2021-01-06 10:19:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:19:31,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452977151] [2021-01-06 10:19:31,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633605456] [2021-01-06 10:19:31,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:31,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:19:31,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:19:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:19:31,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:31,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:19:31,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242443728] [2021-01-06 10:19:31,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:19:31,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:19:31,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:19:31,642 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 13 states. [2021-01-06 10:19:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:31,688 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-01-06 10:19:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:19:31,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2021-01-06 10:19:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:31,690 INFO L225 Difference]: With dead ends: 118 [2021-01-06 10:19:31,690 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:19:31,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 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 10:19:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:19:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-01-06 10:19:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:19:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-01-06 10:19:31,695 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2021-01-06 10:19:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:31,695 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-01-06 10:19:31,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:19:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-01-06 10:19:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:19:31,696 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:31,696 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:31,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:19:31,910 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:31,911 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2021-01-06 10:19:31,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:31,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98188746] [2021-01-06 10:19:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:19:32,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98188746] [2021-01-06 10:19:32,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436277366] [2021-01-06 10:19:32,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:32,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:19:32,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:32,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:19:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:19:32,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:32,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:19:32,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375360980] [2021-01-06 10:19:32,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:19:32,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:32,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:19:32,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:19:32,518 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2021-01-06 10:19:32,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:32,571 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-01-06 10:19:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:19:32,571 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2021-01-06 10:19:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:32,572 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:19:32,572 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 10:19:32,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 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 10:19:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 10:19:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-01-06 10:19:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:19:32,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-01-06 10:19:32,578 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2021-01-06 10:19:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:32,578 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-01-06 10:19:32,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:19:32,578 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-01-06 10:19:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:19:32,579 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:32,579 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:32,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:19:32,794 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:32,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2021-01-06 10:19:32,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:32,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667358953] [2021-01-06 10:19:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:19:32,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667358953] [2021-01-06 10:19:32,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719854206] [2021-01-06 10:19:32,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:33,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:19:33,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:33,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:19:33,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 10:19:33,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:33,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-01-06 10:19:33,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342279300] [2021-01-06 10:19:33,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:19:33,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:33,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:19:33,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:19:33,588 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2021-01-06 10:19:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:33,694 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-01-06 10:19:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:19:33,695 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2021-01-06 10:19:33,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:33,696 INFO L225 Difference]: With dead ends: 125 [2021-01-06 10:19:33,696 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 10:19:33,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:19:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 10:19:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-01-06 10:19:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 10:19:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-01-06 10:19:33,701 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2021-01-06 10:19:33,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:33,701 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-01-06 10:19:33,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:19:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-01-06 10:19:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:19:33,702 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:33,702 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:33,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:33,916 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:33,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:33,917 INFO L82 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2021-01-06 10:19:33,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:33,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853804081] [2021-01-06 10:19:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:19:34,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853804081] [2021-01-06 10:19:34,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208184949] [2021-01-06 10:19:34,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:34,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:19:34,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:19:34,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:34,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:19:34,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850968236] [2021-01-06 10:19:34,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:19:34,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:34,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:19:34,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:19:34,328 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 16 states. [2021-01-06 10:19:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:34,393 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-01-06 10:19:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:19:34,394 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2021-01-06 10:19:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:34,395 INFO L225 Difference]: With dead ends: 128 [2021-01-06 10:19:34,395 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 10:19:34,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 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 10:19:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 10:19:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-01-06 10:19:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 10:19:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-01-06 10:19:34,401 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2021-01-06 10:19:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:34,401 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-01-06 10:19:34,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:19:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-01-06 10:19:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 10:19:34,402 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:34,402 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:34,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:19:34,616 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:34,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2021-01-06 10:19:34,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:34,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726065554] [2021-01-06 10:19:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:19:34,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726065554] [2021-01-06 10:19:34,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814767737] [2021-01-06 10:19:34,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:34,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:19:34,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:34,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:19:34,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:19:35,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:35,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:19:35,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825649166] [2021-01-06 10:19:35,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:19:35,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:35,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:19:35,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:19:35,014 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2021-01-06 10:19:35,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:35,070 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-01-06 10:19:35,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:19:35,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2021-01-06 10:19:35,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:35,072 INFO L225 Difference]: With dead ends: 130 [2021-01-06 10:19:35,072 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 10:19:35,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 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 10:19:35,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 10:19:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-01-06 10:19:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 10:19:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-01-06 10:19:35,077 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2021-01-06 10:19:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:35,077 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-01-06 10:19:35,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:19:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-01-06 10:19:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:19:35,078 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:35,078 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:35,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:19:35,292 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2021-01-06 10:19:35,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:35,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497987507] [2021-01-06 10:19:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:19:35,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497987507] [2021-01-06 10:19:35,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219424934] [2021-01-06 10:19:35,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:35,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:19:35,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:35,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:19:35,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-01-06 10:19:35,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:35,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-01-06 10:19:35,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323755143] [2021-01-06 10:19:35,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:19:35,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:19:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:19:35,993 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 22 states. [2021-01-06 10:19:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:36,185 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-01-06 10:19:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:19:36,186 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 79 [2021-01-06 10:19:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:36,187 INFO L225 Difference]: With dead ends: 141 [2021-01-06 10:19:36,187 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 10:19:36,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:19:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 10:19:36,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-01-06 10:19:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:19:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-01-06 10:19:36,193 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2021-01-06 10:19:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:36,193 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-01-06 10:19:36,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:19:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-01-06 10:19:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 10:19:36,194 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:36,196 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:36,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:19:36,409 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:36,409 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2021-01-06 10:19:36,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:36,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592285256] [2021-01-06 10:19:36,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:19:36,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592285256] [2021-01-06 10:19:36,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782267198] [2021-01-06 10:19:36,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:36,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:19:36,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:36,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:19:36,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:19:36,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:36,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:19:36,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277933536] [2021-01-06 10:19:36,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:19:36,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:36,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:19:36,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:19:36,919 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 19 states. [2021-01-06 10:19:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:36,983 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-01-06 10:19:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:19:36,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2021-01-06 10:19:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:36,984 INFO L225 Difference]: With dead ends: 146 [2021-01-06 10:19:36,984 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 10:19:36,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 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 10:19:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 10:19:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-01-06 10:19:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 10:19:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-01-06 10:19:36,989 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2021-01-06 10:19:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:36,989 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-01-06 10:19:36,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:19:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-01-06 10:19:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:19:36,993 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:36,993 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:37,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:37,207 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:37,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2021-01-06 10:19:37,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:37,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128060530] [2021-01-06 10:19:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:19:37,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128060530] [2021-01-06 10:19:37,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432874204] [2021-01-06 10:19:37,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:38,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 10:19:38,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:38,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:19:38,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:19:38,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:38,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:19:38,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975158572] [2021-01-06 10:19:38,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:19:38,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:38,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:19:38,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:19:38,648 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2021-01-06 10:19:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:38,723 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2021-01-06 10:19:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:19:38,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2021-01-06 10:19:38,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:38,729 INFO L225 Difference]: With dead ends: 148 [2021-01-06 10:19:38,729 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:19:38,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:19:38,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:19:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-01-06 10:19:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:19:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-01-06 10:19:38,736 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2021-01-06 10:19:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:38,736 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-01-06 10:19:38,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:19:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-01-06 10:19:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:19:38,737 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:38,737 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:38,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:38,951 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:38,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2021-01-06 10:19:38,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:38,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453376326] [2021-01-06 10:19:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:19:39,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453376326] [2021-01-06 10:19:39,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709350820] [2021-01-06 10:19:39,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:39,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 10:19:39,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:19:39,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-01-06 10:19:40,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:40,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-01-06 10:19:40,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323501450] [2021-01-06 10:19:40,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:19:40,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:40,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:19:40,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:19:40,077 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 26 states. [2021-01-06 10:19:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:40,255 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-01-06 10:19:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:19:40,256 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2021-01-06 10:19:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:40,257 INFO L225 Difference]: With dead ends: 159 [2021-01-06 10:19:40,257 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:19:40,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:19:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:19:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-01-06 10:19:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 10:19:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-01-06 10:19:40,262 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2021-01-06 10:19:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:40,262 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-01-06 10:19:40,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:19:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-01-06 10:19:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 10:19:40,263 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:40,263 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:40,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:19:40,478 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:40,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:40,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2021-01-06 10:19:40,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:40,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049232334] [2021-01-06 10:19:40,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:19:40,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049232334] [2021-01-06 10:19:40,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035715590] [2021-01-06 10:19:40,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:40,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:19:40,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:19:41,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:41,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:19:41,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706827964] [2021-01-06 10:19:41,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:19:41,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:41,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:19:41,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:19:41,005 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 22 states. [2021-01-06 10:19:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:41,081 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2021-01-06 10:19:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:19:41,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2021-01-06 10:19:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:41,083 INFO L225 Difference]: With dead ends: 164 [2021-01-06 10:19:41,083 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 10:19:41,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 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 10:19:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 10:19:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-01-06 10:19:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 10:19:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-01-06 10:19:41,087 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2021-01-06 10:19:41,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:41,088 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-01-06 10:19:41,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:19:41,088 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-01-06 10:19:41,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:19:41,089 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:41,089 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:41,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:19:41,305 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2021-01-06 10:19:41,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:41,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006458303] [2021-01-06 10:19:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:19:41,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006458303] [2021-01-06 10:19:41,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613867710] [2021-01-06 10:19:41,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:41,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:19:41,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:41,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:19:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:19:41,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:41,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 10:19:41,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898485368] [2021-01-06 10:19:41,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:19:41,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:41,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:19:41,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:19:41,832 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2021-01-06 10:19:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:41,908 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2021-01-06 10:19:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:19:41,909 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2021-01-06 10:19:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:41,909 INFO L225 Difference]: With dead ends: 166 [2021-01-06 10:19:41,910 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 10:19:41,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 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 10:19:41,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 10:19:41,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-01-06 10:19:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 10:19:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-01-06 10:19:41,914 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2021-01-06 10:19:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:41,914 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-01-06 10:19:41,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:19:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-01-06 10:19:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-06 10:19:41,915 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:41,915 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:42,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:42,131 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2021-01-06 10:19:42,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:42,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760686660] [2021-01-06 10:19:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:19:42,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760686660] [2021-01-06 10:19:42,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687442013] [2021-01-06 10:19:42,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:42,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:19:42,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:42,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:19:42,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-01-06 10:19:43,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:43,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2021-01-06 10:19:43,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981023409] [2021-01-06 10:19:43,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:19:43,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:43,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:19:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:19:43,052 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 29 states. [2021-01-06 10:19:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:43,184 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2021-01-06 10:19:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:19:43,185 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 103 [2021-01-06 10:19:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:43,186 INFO L225 Difference]: With dead ends: 171 [2021-01-06 10:19:43,186 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 10:19:43,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:19:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 10:19:43,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-01-06 10:19:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:19:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-01-06 10:19:43,192 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2021-01-06 10:19:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:43,192 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-01-06 10:19:43,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:19:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-01-06 10:19:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 10:19:43,193 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:43,194 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:43,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:19:43,407 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:43,408 INFO L82 PathProgramCache]: Analyzing trace with hash 676687458, now seen corresponding path program 22 times [2021-01-06 10:19:43,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:43,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004646317] [2021-01-06 10:19:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 10:19:43,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004646317] [2021-01-06 10:19:43,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135915780] [2021-01-06 10:19:43,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:43,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:19:43,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:43,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:19:43,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 10:19:44,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:44,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 10:19:44,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234311797] [2021-01-06 10:19:44,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:19:44,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:44,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:19:44,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:19:44,104 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 25 states. [2021-01-06 10:19:44,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:44,190 INFO L93 Difference]: Finished difference Result 174 states and 182 transitions. [2021-01-06 10:19:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:19:44,191 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2021-01-06 10:19:44,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:44,192 INFO L225 Difference]: With dead ends: 174 [2021-01-06 10:19:44,192 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 10:19:44,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 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 10:19:44,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 10:19:44,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-01-06 10:19:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 10:19:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-01-06 10:19:44,197 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2021-01-06 10:19:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:44,197 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-01-06 10:19:44,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:19:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-01-06 10:19:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-06 10:19:44,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:44,198 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:44,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:44,411 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:44,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:44,412 INFO L82 PathProgramCache]: Analyzing trace with hash -168895456, now seen corresponding path program 23 times [2021-01-06 10:19:44,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:44,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019408742] [2021-01-06 10:19:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 10:19:44,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019408742] [2021-01-06 10:19:44,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844027227] [2021-01-06 10:19:44,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:45,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-01-06 10:19:45,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:45,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:19:45,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2021-01-06 10:19:46,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:46,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2021-01-06 10:19:46,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66113510] [2021-01-06 10:19:46,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:19:46,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:46,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:19:46,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:19:46,158 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 32 states. [2021-01-06 10:19:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:46,433 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2021-01-06 10:19:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:19:46,434 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 109 [2021-01-06 10:19:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:46,435 INFO L225 Difference]: With dead ends: 185 [2021-01-06 10:19:46,435 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 10:19:46,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:19:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 10:19:46,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2021-01-06 10:19:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 10:19:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-01-06 10:19:46,441 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 109 [2021-01-06 10:19:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:46,441 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-01-06 10:19:46,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:19:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-01-06 10:19:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 10:19:46,442 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:46,442 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:46,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:19:46,656 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:46,656 INFO L82 PathProgramCache]: Analyzing trace with hash -375494436, now seen corresponding path program 24 times [2021-01-06 10:19:46,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:46,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447076650] [2021-01-06 10:19:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:19:47,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447076650] [2021-01-06 10:19:47,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375982290] [2021-01-06 10:19:47,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:48,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:19:48,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:48,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:19:48,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-01-06 10:19:48,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:48,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2021-01-06 10:19:48,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359745717] [2021-01-06 10:19:48,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:19:48,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:48,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:19:48,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:19:48,477 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 33 states. [2021-01-06 10:19:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:48,651 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2021-01-06 10:19:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:19:48,651 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 117 [2021-01-06 10:19:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:48,655 INFO L225 Difference]: With dead ends: 193 [2021-01-06 10:19:48,655 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 10:19:48,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:19:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 10:19:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-01-06 10:19:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 10:19:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-01-06 10:19:48,662 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 117 [2021-01-06 10:19:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:48,662 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-01-06 10:19:48,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:19:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-01-06 10:19:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 10:19:48,663 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:48,664 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:48,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:19:48,877 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:48,878 INFO L82 PathProgramCache]: Analyzing trace with hash 26792216, now seen corresponding path program 25 times [2021-01-06 10:19:48,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:48,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435552049] [2021-01-06 10:19:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:19:49,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435552049] [2021-01-06 10:19:49,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893028106] [2021-01-06 10:19:49,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:49,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:19:49,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:19:49,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:49,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:19:49,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767781464] [2021-01-06 10:19:49,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:19:49,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:49,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:19:49,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:19:49,658 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 28 states. [2021-01-06 10:19:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:49,757 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2021-01-06 10:19:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:19:49,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 121 [2021-01-06 10:19:49,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:49,759 INFO L225 Difference]: With dead ends: 196 [2021-01-06 10:19:49,759 INFO L226 Difference]: Without dead ends: 125 [2021-01-06 10:19:49,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 121 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 10:19:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-06 10:19:49,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-01-06 10:19:49,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-01-06 10:19:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-01-06 10:19:49,765 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2021-01-06 10:19:49,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:49,765 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-01-06 10:19:49,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:19:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-01-06 10:19:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-01-06 10:19:49,766 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:49,767 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:49,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:19:49,982 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:49,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1400350122, now seen corresponding path program 26 times [2021-01-06 10:19:49,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:49,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028520596] [2021-01-06 10:19:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:19:50,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028520596] [2021-01-06 10:19:50,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841728863] [2021-01-06 10:19:50,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:50,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:19:50,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:50,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:19:50,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:19:50,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:50,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:19:50,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301126353] [2021-01-06 10:19:50,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:19:50,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:50,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:19:50,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:19:50,750 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 29 states. [2021-01-06 10:19:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:50,861 INFO L93 Difference]: Finished difference Result 198 states and 206 transitions. [2021-01-06 10:19:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:19:50,861 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 123 [2021-01-06 10:19:50,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:50,862 INFO L225 Difference]: With dead ends: 198 [2021-01-06 10:19:50,863 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 10:19:50,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 123 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 10:19:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 10:19:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2021-01-06 10:19:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 10:19:50,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-01-06 10:19:50,869 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2021-01-06 10:19:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:50,869 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-01-06 10:19:50,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:19:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-01-06 10:19:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-01-06 10:19:50,870 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:50,871 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:51,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:19:51,086 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:51,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1505397780, now seen corresponding path program 27 times [2021-01-06 10:19:51,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:51,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142702501] [2021-01-06 10:19:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:19:51,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142702501] [2021-01-06 10:19:51,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206421704] [2021-01-06 10:19:51,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:52,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:19:52,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:52,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:19:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 51 proven. 49 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2021-01-06 10:19:52,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:52,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12] total 39 [2021-01-06 10:19:52,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351260518] [2021-01-06 10:19:52,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 10:19:52,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:52,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 10:19:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:19:52,465 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 39 states. [2021-01-06 10:19:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:53,024 INFO L93 Difference]: Finished difference Result 210 states and 222 transitions. [2021-01-06 10:19:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:19:53,025 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 125 [2021-01-06 10:19:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:53,025 INFO L225 Difference]: With dead ends: 210 [2021-01-06 10:19:53,025 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 10:19:53,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:19:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 10:19:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2021-01-06 10:19:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 10:19:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-01-06 10:19:53,033 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 125 [2021-01-06 10:19:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:53,033 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-01-06 10:19:53,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 10:19:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-01-06 10:19:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:19:53,035 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:53,035 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:53,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:53,250 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:53,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:53,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1304669938, now seen corresponding path program 28 times [2021-01-06 10:19:53,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:53,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620462075] [2021-01-06 10:19:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:19:53,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620462075] [2021-01-06 10:19:53,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773528029] [2021-01-06 10:19:53,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:54,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:19:54,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 10:19:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:19:54,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:19:54,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 10:19:54,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790142568] [2021-01-06 10:19:54,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:19:54,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:54,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:19:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:19:54,210 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 32 states. [2021-01-06 10:19:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:54,335 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2021-01-06 10:19:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 10:19:54,336 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2021-01-06 10:19:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:54,336 INFO L225 Difference]: With dead ends: 216 [2021-01-06 10:19:54,337 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 10:19:54,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:19:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 10:19:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-01-06 10:19:54,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 10:19:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-01-06 10:19:54,343 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2021-01-06 10:19:54,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:54,343 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-01-06 10:19:54,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:19:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-01-06 10:19:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-01-06 10:19:54,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:54,345 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:54,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:54,559 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:54,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:54,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1038865868, now seen corresponding path program 29 times [2021-01-06 10:19:54,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:54,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969475864] [2021-01-06 10:19:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:19:55,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969475864] [2021-01-06 10:19:55,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533086975] [2021-01-06 10:19:55,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:01,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 10:20:01,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:20:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:20:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked. [2021-01-06 10:20:02,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:02,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2021-01-06 10:20:02,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312061370] [2021-01-06 10:20:02,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:20:02,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:02,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:20:02,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:20:02,099 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 41 states. [2021-01-06 10:20:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:02,382 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2021-01-06 10:20:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:20:02,383 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 137 [2021-01-06 10:20:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:02,384 INFO L225 Difference]: With dead ends: 227 [2021-01-06 10:20:02,384 INFO L226 Difference]: Without dead ends: 150 [2021-01-06 10:20:02,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:20:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-01-06 10:20:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2021-01-06 10:20:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 10:20:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2021-01-06 10:20:02,391 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 137 [2021-01-06 10:20:02,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:02,391 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2021-01-06 10:20:02,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:20:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2021-01-06 10:20:02,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-01-06 10:20:02,392 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:02,393 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:02,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:02,607 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:02,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379384, now seen corresponding path program 30 times [2021-01-06 10:20:02,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:02,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715221925] [2021-01-06 10:20:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-01-06 10:20:03,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715221925] [2021-01-06 10:20:03,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500253235] [2021-01-06 10:20:03,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:04,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 10:20:04,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:20:04,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:20:04,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2021-01-06 10:20:04,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:04,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 10] total 41 [2021-01-06 10:20:04,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528201444] [2021-01-06 10:20:04,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:20:04,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:20:04,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=1068, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:20:04,996 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 41 states. [2021-01-06 10:20:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:05,223 INFO L93 Difference]: Finished difference Result 235 states and 244 transitions. [2021-01-06 10:20:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:20:05,224 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 145 [2021-01-06 10:20:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:05,225 INFO L225 Difference]: With dead ends: 235 [2021-01-06 10:20:05,225 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 10:20:05,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=572, Invalid=1068, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:20:05,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 10:20:05,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-01-06 10:20:05,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2021-01-06 10:20:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-01-06 10:20:05,235 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 145 [2021-01-06 10:20:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:05,235 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-01-06 10:20:05,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:20:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-01-06 10:20:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-01-06 10:20:05,236 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:05,237 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:05,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:20:05,450 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:05,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1220684740, now seen corresponding path program 31 times [2021-01-06 10:20:05,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:05,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030159004] [2021-01-06 10:20:05,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-01-06 10:20:06,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030159004] [2021-01-06 10:20:06,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305093124] [2021-01-06 10:20:06,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:20:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-01-06 10:20:06,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:06,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 10:20:06,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422296691] [2021-01-06 10:20:06,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:20:06,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:06,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:20:06,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:20:06,698 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 35 states. [2021-01-06 10:20:06,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:06,820 INFO L93 Difference]: Finished difference Result 238 states and 246 transitions. [2021-01-06 10:20:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:20:06,820 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 149 [2021-01-06 10:20:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:06,821 INFO L225 Difference]: With dead ends: 238 [2021-01-06 10:20:06,822 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 10:20:06,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:20:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 10:20:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-01-06 10:20:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 10:20:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-01-06 10:20:06,828 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2021-01-06 10:20:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:06,829 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-01-06 10:20:06,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:20:06,829 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-01-06 10:20:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 10:20:06,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:06,830 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:07,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:07,046 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:07,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:07,047 INFO L82 PathProgramCache]: Analyzing trace with hash 164858882, now seen corresponding path program 32 times [2021-01-06 10:20:07,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:07,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736457203] [2021-01-06 10:20:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-01-06 10:20:07,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736457203] [2021-01-06 10:20:07,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517761818] [2021-01-06 10:20:07,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:07,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:20:07,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:20:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 10:20:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-01-06 10:20:08,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:08,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 10:20:08,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576514654] [2021-01-06 10:20:08,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:20:08,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:08,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:20:08,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:20:08,159 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 36 states. [2021-01-06 10:20:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:08,309 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2021-01-06 10:20:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 10:20:08,309 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 151 [2021-01-06 10:20:08,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:08,311 INFO L225 Difference]: With dead ends: 240 [2021-01-06 10:20:08,311 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 10:20:08,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 151 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 10:20:08,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 10:20:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-01-06 10:20:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 10:20:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2021-01-06 10:20:08,319 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2021-01-06 10:20:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:08,320 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2021-01-06 10:20:08,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:20:08,320 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2021-01-06 10:20:08,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 10:20:08,321 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:08,321 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:08,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:20:08,535 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:08,536 INFO L82 PathProgramCache]: Analyzing trace with hash -871508800, now seen corresponding path program 33 times [2021-01-06 10:20:08,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:08,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582982075] [2021-01-06 10:20:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-01-06 10:20:09,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582982075] [2021-01-06 10:20:09,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250325454] [2021-01-06 10:20:09,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:10,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 10:20:10,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:20:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:20:10,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2021-01-06 10:20:10,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:10,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 11] total 45 [2021-01-06 10:20:10,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366227077] [2021-01-06 10:20:10,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 10:20:10,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:10,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 10:20:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=1296, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:20:10,481 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 45 states. [2021-01-06 10:20:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:10,729 INFO L93 Difference]: Finished difference Result 245 states and 254 transitions. [2021-01-06 10:20:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 10:20:10,730 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 153 [2021-01-06 10:20:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:10,731 INFO L225 Difference]: With dead ends: 245 [2021-01-06 10:20:10,732 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 10:20:10,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1296, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:20:10,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 10:20:10,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-01-06 10:20:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 10:20:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2021-01-06 10:20:10,739 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 153 [2021-01-06 10:20:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:10,739 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2021-01-06 10:20:10,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 10:20:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2021-01-06 10:20:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-01-06 10:20:10,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:10,740 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:10,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:10,955 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:10,956 INFO L82 PathProgramCache]: Analyzing trace with hash -926307076, now seen corresponding path program 34 times [2021-01-06 10:20:10,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:10,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936214239] [2021-01-06 10:20:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:20:11,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936214239] [2021-01-06 10:20:11,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146493433] [2021-01-06 10:20:11,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:11,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:20:11,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:20:11,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:20:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1399 trivial. 0 not checked. [2021-01-06 10:20:12,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:12,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 12] total 47 [2021-01-06 10:20:12,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100523442] [2021-01-06 10:20:12,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:20:12,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:20:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:20:12,448 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 47 states. [2021-01-06 10:20:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:12,914 INFO L93 Difference]: Finished difference Result 257 states and 268 transitions. [2021-01-06 10:20:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:20:12,915 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 157 [2021-01-06 10:20:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:12,916 INFO L225 Difference]: With dead ends: 257 [2021-01-06 10:20:12,916 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 10:20:12,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:20:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 10:20:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2021-01-06 10:20:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 10:20:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2021-01-06 10:20:12,923 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 157 [2021-01-06 10:20:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:12,923 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2021-01-06 10:20:12,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:20:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2021-01-06 10:20:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-01-06 10:20:12,924 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:12,925 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:13,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:20:13,139 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:13,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1127903816, now seen corresponding path program 35 times [2021-01-06 10:20:13,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:13,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27762204] [2021-01-06 10:20:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-01-06 10:20:14,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27762204] [2021-01-06 10:20:14,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964920219] [2021-01-06 10:20:14,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:18,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 10:22:18,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:22:18,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:22:18,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1506 trivial. 0 not checked. [2021-01-06 10:22:19,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:19,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 13] total 49 [2021-01-06 10:22:19,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245921199] [2021-01-06 10:22:19,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 10:22:19,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:19,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 10:22:19,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:22:19,446 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 49 states. [2021-01-06 10:22:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:19,921 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2021-01-06 10:22:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 10:22:19,922 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 165 [2021-01-06 10:22:19,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:19,923 INFO L225 Difference]: With dead ends: 271 [2021-01-06 10:22:19,923 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 10:22:19,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:22:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 10:22:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2021-01-06 10:22:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 10:22:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2021-01-06 10:22:19,930 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 165 [2021-01-06 10:22:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:19,931 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2021-01-06 10:22:19,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 10:22:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2021-01-06 10:22:19,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 10:22:19,932 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:19,932 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:20,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:22:20,147 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:20,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:20,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1845202060, now seen corresponding path program 36 times [2021-01-06 10:22:20,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:20,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132764230] [2021-01-06 10:22:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-01-06 10:22:21,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132764230] [2021-01-06 10:22:21,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599351800] [2021-01-06 10:22:21,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:30,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:22:30,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:22:30,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:22:30,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1659 trivial. 0 not checked. [2021-01-06 10:22:30,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:30,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 12] total 49 [2021-01-06 10:22:30,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627245674] [2021-01-06 10:22:30,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 10:22:30,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:30,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 10:22:30,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:22:30,589 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 49 states. [2021-01-06 10:22:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:30,842 INFO L93 Difference]: Finished difference Result 279 states and 288 transitions. [2021-01-06 10:22:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 10:22:30,842 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 173 [2021-01-06 10:22:30,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:30,844 INFO L225 Difference]: With dead ends: 279 [2021-01-06 10:22:30,844 INFO L226 Difference]: Without dead ends: 180 [2021-01-06 10:22:30,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:22:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-01-06 10:22:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-01-06 10:22:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 10:22:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-01-06 10:22:30,854 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 173 [2021-01-06 10:22:30,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:30,855 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-01-06 10:22:30,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 10:22:30,855 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-01-06 10:22:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-01-06 10:22:30,856 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:30,856 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:31,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:22:31,071 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:31,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1798241360, now seen corresponding path program 37 times [2021-01-06 10:22:31,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:31,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561570804] [2021-01-06 10:22:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:22:32,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561570804] [2021-01-06 10:22:32,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234045635] [2021-01-06 10:22:32,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:32,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:22:32,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:22:32,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:32,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 10:22:32,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941375624] [2021-01-06 10:22:32,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:22:32,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:32,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:22:32,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:22:32,502 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 41 states. [2021-01-06 10:22:32,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:32,661 INFO L93 Difference]: Finished difference Result 282 states and 290 transitions. [2021-01-06 10:22:32,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:22:32,662 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 177 [2021-01-06 10:22:32,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:32,663 INFO L225 Difference]: With dead ends: 282 [2021-01-06 10:22:32,664 INFO L226 Difference]: Without dead ends: 181 [2021-01-06 10:22:32,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 177 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 10:22:32,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-01-06 10:22:32,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2021-01-06 10:22:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 10:22:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2021-01-06 10:22:32,671 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 177 [2021-01-06 10:22:32,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:32,672 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2021-01-06 10:22:32,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:22:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2021-01-06 10:22:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-01-06 10:22:32,673 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:32,673 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:32,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:22:32,887 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:32,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:32,888 INFO L82 PathProgramCache]: Analyzing trace with hash -110380306, now seen corresponding path program 38 times [2021-01-06 10:22:32,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:32,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456729393] [2021-01-06 10:22:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:22:34,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456729393] [2021-01-06 10:22:34,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745578244] [2021-01-06 10:22:34,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:34,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:22:34,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:22:34,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 10:22:34,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:22:34,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:34,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 10:22:34,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227897532] [2021-01-06 10:22:34,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:22:34,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:34,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:22:34,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:22:34,367 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 42 states. [2021-01-06 10:22:34,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:34,566 INFO L93 Difference]: Finished difference Result 284 states and 292 transitions. [2021-01-06 10:22:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:22:34,567 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 179 [2021-01-06 10:22:34,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:34,568 INFO L225 Difference]: With dead ends: 284 [2021-01-06 10:22:34,568 INFO L226 Difference]: Without dead ends: 183 [2021-01-06 10:22:34,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 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 10:22:34,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-01-06 10:22:34,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2021-01-06 10:22:34,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 10:22:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2021-01-06 10:22:34,575 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 179 [2021-01-06 10:22:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:34,575 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2021-01-06 10:22:34,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:22:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2021-01-06 10:22:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 10:22:34,576 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:34,577 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:34,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:34,792 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:34,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1573545300, now seen corresponding path program 39 times [2021-01-06 10:22:34,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:34,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952662933] [2021-01-06 10:22:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:22:35,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952662933] [2021-01-06 10:22:35,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321590045] [2021-01-06 10:22:35,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:37,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 10:22:37,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:22:37,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:22:37,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1884 trivial. 0 not checked. [2021-01-06 10:22:37,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:37,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 13] total 53 [2021-01-06 10:22:37,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878564420] [2021-01-06 10:22:37,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 10:22:37,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:37,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 10:22:37,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=938, Invalid=1818, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:22:37,655 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 53 states. [2021-01-06 10:22:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:37,978 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2021-01-06 10:22:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 10:22:37,979 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 181 [2021-01-06 10:22:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:37,980 INFO L225 Difference]: With dead ends: 289 [2021-01-06 10:22:37,980 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 10:22:37,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=938, Invalid=1818, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:22:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 10:22:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2021-01-06 10:22:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 10:22:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2021-01-06 10:22:37,988 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 181 [2021-01-06 10:22:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:37,988 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2021-01-06 10:22:37,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 10:22:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2021-01-06 10:22:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-01-06 10:22:37,990 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:37,990 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:38,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 10:22:38,205 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash -456024344, now seen corresponding path program 40 times [2021-01-06 10:22:38,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:38,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018734801] [2021-01-06 10:22:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 10:22:39,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018734801] [2021-01-06 10:22:39,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423595244] [2021-01-06 10:22:39,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:39,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:22:39,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:22:39,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:22:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2021-01-06 10:22:40,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:40,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 55 [2021-01-06 10:22:40,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376292346] [2021-01-06 10:22:40,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 10:22:40,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:40,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 10:22:40,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 10:22:40,165 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 55 states. [2021-01-06 10:22:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:40,485 INFO L93 Difference]: Finished difference Result 295 states and 304 transitions. [2021-01-06 10:22:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 10:22:40,486 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 185 [2021-01-06 10:22:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:40,487 INFO L225 Difference]: With dead ends: 295 [2021-01-06 10:22:40,487 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 10:22:40,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 10:22:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 10:22:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-01-06 10:22:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-01-06 10:22:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2021-01-06 10:22:40,495 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 185 [2021-01-06 10:22:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:40,495 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2021-01-06 10:22:40,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 10:22:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2021-01-06 10:22:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-01-06 10:22:40,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:40,497 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:40,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:40,711 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash -91556572, now seen corresponding path program 41 times [2021-01-06 10:22:40,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:40,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127152465] [2021-01-06 10:22:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-01-06 10:22:42,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127152465] [2021-01-06 10:22:42,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574812893] [2021-01-06 10:22:42,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true