/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-crafted/mapavg1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:43:56,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:43:56,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:43:56,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:43:56,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:43:56,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:43:56,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:43:56,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:43:56,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:43:56,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:43:56,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:43:56,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:43:56,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:43:56,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:43:56,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:43:56,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:43:56,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:43:56,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:43:57,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:43:57,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:43:57,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:43:57,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:43:57,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:43:57,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:43:57,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:43:57,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:43:57,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:43:57,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:43:57,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:43:57,103 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:43:57,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:43:57,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:43:57,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:43:57,106 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:43:57,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:43:57,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:43:57,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:43:57,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:43:57,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:43:57,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:43:57,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:43:57,107 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:43:57,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:43:57,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:43:57,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:43:57,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:43:57,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:43:57,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:43:57,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:43:57,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:43:57,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:43:57,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:43:57,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:43:57,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:43:57,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:43:57,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:43:57,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:43:57,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:43:57,515 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:43:57,516 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:43:57,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapavg1.i [2020-12-23 00:43:57,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/359d5b37a/f1f0e1e5b0ec4ebaa1d6726cd62eaee9/FLAG79b8954f5 [2020-12-23 00:43:58,297 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:43:58,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i [2020-12-23 00:43:58,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/359d5b37a/f1f0e1e5b0ec4ebaa1d6726cd62eaee9/FLAG79b8954f5 [2020-12-23 00:43:58,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/359d5b37a/f1f0e1e5b0ec4ebaa1d6726cd62eaee9 [2020-12-23 00:43:58,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:43:58,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:43:58,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:43:58,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:43:58,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:43:58,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:43:58" (1/1) ... [2020-12-23 00:43:58,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79fa5761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58, skipping insertion in model container [2020-12-23 00:43:58,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:43:58" (1/1) ... [2020-12-23 00:43:58,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:43:58,717 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[99]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:43:58,930 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2020-12-23 00:43:58,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:43:58,944 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[396],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:43:58,971 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2020-12-23 00:43:58,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:43:58,996 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:43:58,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58 WrapperNode [2020-12-23 00:43:58,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:43:58,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:43:58,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:43:58,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:43:59,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58" (1/1) ... [2020-12-23 00:43:59,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58" (1/1) ... [2020-12-23 00:43:59,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:43:59,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:43:59,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:43:59,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:43:59,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58" (1/1) ... [2020-12-23 00:43:59,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58" (1/1) ... [2020-12-23 00:43:59,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58" (1/1) ... [2020-12-23 00:43:59,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58" (1/1) ... [2020-12-23 00:43:59,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58" (1/1) ... [2020-12-23 00:43:59,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58" (1/1) ... [2020-12-23 00:43:59,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58" (1/1) ... [2020-12-23 00:43:59,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:43:59,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:43:59,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:43:59,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:43:59,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:43:59,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:43:59,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:43:59,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:43:59,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:43:59,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:43:59,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:43:59,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:43:59,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:43:59,853 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:43:59,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:43:59 BoogieIcfgContainer [2020-12-23 00:43:59,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:43:59,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:43:59,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:43:59,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:43:59,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:43:58" (1/3) ... [2020-12-23 00:43:59,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cad6916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:43:59, skipping insertion in model container [2020-12-23 00:43:59,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:58" (2/3) ... [2020-12-23 00:43:59,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cad6916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:43:59, skipping insertion in model container [2020-12-23 00:43:59,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:43:59" (3/3) ... [2020-12-23 00:43:59,873 INFO L111 eAbstractionObserver]: Analyzing ICFG mapavg1.i [2020-12-23 00:43:59,880 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:43:59,886 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:43:59,910 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:43:59,956 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:43:59,956 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:43:59,956 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:43:59,956 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:43:59,957 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:43:59,957 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:43:59,957 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:43:59,957 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:43:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-23 00:43:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:43:59,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:59,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:59,983 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:59,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:59,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2020-12-23 00:44:00,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:00,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593968949] [2020-12-23 00:44:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:44:00,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593968949] [2020-12-23 00:44:00,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:44:00,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:44:00,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677874821] [2020-12-23 00:44:00,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:00,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:00,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:00,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:44:00,298 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-12-23 00:44:00,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:00,338 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-12-23 00:44:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:00,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:44:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:00,356 INFO L225 Difference]: With dead ends: 52 [2020-12-23 00:44:00,356 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 00:44:00,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:44:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 00:44:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-23 00:44:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:44:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 00:44:00,399 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-12-23 00:44:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:00,399 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 00:44:00,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 00:44:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:44:00,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:00,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:00,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:44:00,402 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2020-12-23 00:44:00,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:00,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243175443] [2020-12-23 00:44:00,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:44:00,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243175443] [2020-12-23 00:44:00,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940158699] [2020-12-23 00:44:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:00,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:44:00,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:44:00,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:44:00,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:44:00,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344111184] [2020-12-23 00:44:00,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:00,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:00,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:00,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:00,644 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2020-12-23 00:44:00,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:00,681 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 00:44:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:00,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:44:00,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:00,683 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:44:00,683 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:44:00,684 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 [2020-12-23 00:44:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:44:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-23 00:44:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:44:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 00:44:00,690 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-12-23 00:44:00,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:00,691 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 00:44:00,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:00,691 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 00:44:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:44:00,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:00,693 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] [2020-12-23 00:44:00,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:44:00,908 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:00,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:00,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2020-12-23 00:44:00,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:00,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086031463] [2020-12-23 00:44:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:44:00,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086031463] [2020-12-23 00:44:00,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821634116] [2020-12-23 00:44:00,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:44:01,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:01,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:44:01,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:44:01,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295753242] [2020-12-23 00:44:01,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:01,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:01,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:01,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:01,080 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-12-23 00:44:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:01,097 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-23 00:44:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:01,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-23 00:44:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:01,099 INFO L225 Difference]: With dead ends: 38 [2020-12-23 00:44:01,099 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:44:01,100 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 [2020-12-23 00:44:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:44:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-23 00:44:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:44:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 00:44:01,106 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2020-12-23 00:44:01,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:01,107 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 00:44:01,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 00:44:01,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:44:01,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:01,109 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] [2020-12-23 00:44:01,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:01,324 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:01,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2020-12-23 00:44:01,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:01,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152965249] [2020-12-23 00:44:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:01,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152965249] [2020-12-23 00:44:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216852421] [2020-12-23 00:44:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:01,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:44:01,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:01,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:01,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:44:01,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305196942] [2020-12-23 00:44:01,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:44:01,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:44:01,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:01,556 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-12-23 00:44:01,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:01,581 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-12-23 00:44:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:44:01,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-23 00:44:01,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:01,583 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:44:01,583 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:44:01,584 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 [2020-12-23 00:44:01,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:44:01,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 00:44:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:44:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-23 00:44:01,590 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2020-12-23 00:44:01,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:01,591 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-23 00:44:01,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:44:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-23 00:44:01,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:44:01,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:01,592 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] [2020-12-23 00:44:01,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:01,807 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:01,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:01,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2020-12-23 00:44:01,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:01,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615778180] [2020-12-23 00:44:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:44:01,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615778180] [2020-12-23 00:44:01,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142452076] [2020-12-23 00:44:01,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:01,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:01,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:01,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:44:01,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:44:02,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:02,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:44:02,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620898613] [2020-12-23 00:44:02,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:44:02,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:02,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:44:02,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:44:02,026 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-12-23 00:44:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:02,104 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-12-23 00:44:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:44:02,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-23 00:44:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:02,106 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:44:02,106 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 00:44:02,107 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 [2020-12-23 00:44:02,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 00:44:02,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-12-23 00:44:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:44:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-23 00:44:02,113 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2020-12-23 00:44:02,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:02,114 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-23 00:44:02,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:44:02,114 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-23 00:44:02,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:44:02,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:02,115 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] [2020-12-23 00:44:02,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:02,320 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2020-12-23 00:44:02,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:02,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332192143] [2020-12-23 00:44:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:44:02,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332192143] [2020-12-23 00:44:02,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408759435] [2020-12-23 00:44:02,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:02,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:44:02,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:02,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:44:02,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:44:02,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:02,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 00:44:02,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445078369] [2020-12-23 00:44:02,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:44:02,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:02,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:44:02,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:44:02,712 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-12-23 00:44:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:02,811 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-12-23 00:44:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:44:02,811 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-12-23 00:44:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:02,812 INFO L225 Difference]: With dead ends: 81 [2020-12-23 00:44:02,812 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:44:02,813 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 [2020-12-23 00:44:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:44:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-12-23 00:44:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:44:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-23 00:44:02,820 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-12-23 00:44:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:02,820 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-23 00:44:02,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:44:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-23 00:44:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:44:02,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:02,822 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] [2020-12-23 00:44:03,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:44:03,037 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:03,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:03,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2020-12-23 00:44:03,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:03,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916239044] [2020-12-23 00:44:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:03,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916239044] [2020-12-23 00:44:03,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967250379] [2020-12-23 00:44:03,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:03,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:03,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:03,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:03,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:03,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:03,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:44:03,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468788857] [2020-12-23 00:44:03,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:44:03,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:03,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:44:03,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:44:03,360 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-12-23 00:44:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:03,394 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-12-23 00:44:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:44:03,395 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-12-23 00:44:03,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:03,398 INFO L225 Difference]: With dead ends: 86 [2020-12-23 00:44:03,398 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:44:03,399 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 [2020-12-23 00:44:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:44:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:44:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:44:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-12-23 00:44:03,416 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2020-12-23 00:44:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:03,418 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-12-23 00:44:03,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:44:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-12-23 00:44:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:44:03,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:03,419 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] [2020-12-23 00:44:03,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:03,621 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:03,622 INFO L82 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2020-12-23 00:44:03,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:03,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950631249] [2020-12-23 00:44:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:03,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950631249] [2020-12-23 00:44:03,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457641955] [2020-12-23 00:44:03,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:03,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:44:03,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:03,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:03,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 00:44:03,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:03,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-23 00:44:03,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075181465] [2020-12-23 00:44:03,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:03,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:03,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:03,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:03,935 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2020-12-23 00:44:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:04,040 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2020-12-23 00:44:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:44:04,040 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-12-23 00:44:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:04,041 INFO L225 Difference]: With dead ends: 97 [2020-12-23 00:44:04,041 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:44:04,042 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 [2020-12-23 00:44:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:44:04,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-12-23 00:44:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:44:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 00:44:04,051 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2020-12-23 00:44:04,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:04,052 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 00:44:04,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 00:44:04,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:44:04,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:04,053 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] [2020-12-23 00:44:04,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:04,264 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:04,265 INFO L82 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2020-12-23 00:44:04,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:04,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186086476] [2020-12-23 00:44:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-23 00:44:04,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186086476] [2020-12-23 00:44:04,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583370473] [2020-12-23 00:44:04,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:04,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:44:04,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:04,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:44:04,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:04,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:04,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-23 00:44:04,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205393349] [2020-12-23 00:44:04,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:04,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:04,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:04,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:04,718 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2020-12-23 00:44:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:04,784 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2020-12-23 00:44:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:44:04,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-12-23 00:44:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:04,785 INFO L225 Difference]: With dead ends: 105 [2020-12-23 00:44:04,785 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:44:04,786 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 [2020-12-23 00:44:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:44:04,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-12-23 00:44:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 00:44:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-12-23 00:44:04,793 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2020-12-23 00:44:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:04,793 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-12-23 00:44:04,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-12-23 00:44:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:44:04,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:04,794 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] [2020-12-23 00:44:05,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:44:05,010 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:05,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:05,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2020-12-23 00:44:05,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:05,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252402744] [2020-12-23 00:44:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:05,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252402744] [2020-12-23 00:44:05,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100126853] [2020-12-23 00:44:05,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:05,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:44:05,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:05,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:05,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:44:05,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561835722] [2020-12-23 00:44:05,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:44:05,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:05,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:44:05,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:44:05,342 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2020-12-23 00:44:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:05,387 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-12-23 00:44:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:44:05,388 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-12-23 00:44:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:05,389 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:44:05,389 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 00:44:05,390 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 [2020-12-23 00:44:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 00:44:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-23 00:44:05,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 00:44:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-12-23 00:44:05,396 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2020-12-23 00:44:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:05,397 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-12-23 00:44:05,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:44:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-12-23 00:44:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:44:05,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:05,398 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] [2020-12-23 00:44:05,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:05,614 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:05,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:05,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2020-12-23 00:44:05,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:05,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320224991] [2020-12-23 00:44:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:05,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320224991] [2020-12-23 00:44:05,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758339323] [2020-12-23 00:44:05,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:05,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:05,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:44:05,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:05,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:05,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:44:05,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349566450] [2020-12-23 00:44:05,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:05,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:05,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:05,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:05,966 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2020-12-23 00:44:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:06,003 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-12-23 00:44:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:44:06,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-12-23 00:44:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:06,004 INFO L225 Difference]: With dead ends: 110 [2020-12-23 00:44:06,004 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 00:44:06,005 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 [2020-12-23 00:44:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 00:44:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-23 00:44:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:44:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-12-23 00:44:06,022 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2020-12-23 00:44:06,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:06,022 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-12-23 00:44:06,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:06,022 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-12-23 00:44:06,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:44:06,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:06,024 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] [2020-12-23 00:44:06,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:06,238 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:06,239 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2020-12-23 00:44:06,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:06,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357016280] [2020-12-23 00:44:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:06,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357016280] [2020-12-23 00:44:06,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685366087] [2020-12-23 00:44:06,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:06,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:44:06,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:06,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:06,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-23 00:44:06,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:06,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 00:44:06,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367698153] [2020-12-23 00:44:06,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:44:06,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:06,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:44:06,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:44:06,680 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 15 states. [2020-12-23 00:44:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:06,760 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-12-23 00:44:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:44:06,760 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-12-23 00:44:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:06,761 INFO L225 Difference]: With dead ends: 115 [2020-12-23 00:44:06,761 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 00:44:06,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:44:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 00:44:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-12-23 00:44:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 00:44:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-12-23 00:44:06,768 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2020-12-23 00:44:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:06,768 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-12-23 00:44:06,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:44:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-12-23 00:44:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:44:06,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:06,770 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] [2020-12-23 00:44:06,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 00:44:06,983 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:06,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2020-12-23 00:44:06,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:06,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975439013] [2020-12-23 00:44:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:07,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975439013] [2020-12-23 00:44:07,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122747610] [2020-12-23 00:44:07,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:07,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:07,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:07,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:44:07,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:07,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:07,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:44:07,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349910084] [2020-12-23 00:44:07,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:44:07,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:07,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:44:07,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:44:07,337 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 13 states. [2020-12-23 00:44:07,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:07,384 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-12-23 00:44:07,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:44:07,385 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-12-23 00:44:07,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:07,386 INFO L225 Difference]: With dead ends: 118 [2020-12-23 00:44:07,386 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:44:07,389 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 [2020-12-23 00:44:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:44:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-23 00:44:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:44:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-12-23 00:44:07,400 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2020-12-23 00:44:07,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:07,400 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-12-23 00:44:07,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:44:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-12-23 00:44:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:44:07,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:07,403 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] [2020-12-23 00:44:07,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:44:07,617 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:07,618 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2020-12-23 00:44:07,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:07,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149270783] [2020-12-23 00:44:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:07,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149270783] [2020-12-23 00:44:07,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073077659] [2020-12-23 00:44:07,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:07,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:44:07,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:44:07,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:08,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:08,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:44:08,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632223963] [2020-12-23 00:44:08,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:44:08,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:08,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:44:08,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:44:08,058 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2020-12-23 00:44:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:08,100 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-12-23 00:44:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:44:08,101 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-12-23 00:44:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:08,101 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:44:08,101 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:44:08,102 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 [2020-12-23 00:44:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:44:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-23 00:44:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:44:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-23 00:44:08,107 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2020-12-23 00:44:08,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:08,107 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-23 00:44:08,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:44:08,107 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-23 00:44:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:44:08,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:08,108 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] [2020-12-23 00:44:08,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:44:08,324 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:08,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2020-12-23 00:44:08,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:08,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021012307] [2020-12-23 00:44:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:08,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021012307] [2020-12-23 00:44:08,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828104888] [2020-12-23 00:44:08,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:09,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:44:09,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:09,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:44:09,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 00:44:09,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:09,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2020-12-23 00:44:09,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305609679] [2020-12-23 00:44:09,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:44:09,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:09,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:44:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:09,252 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2020-12-23 00:44:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:09,338 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2020-12-23 00:44:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:44:09,339 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-12-23 00:44:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:09,340 INFO L225 Difference]: With dead ends: 125 [2020-12-23 00:44:09,340 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 00:44:09,341 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 [2020-12-23 00:44:09,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 00:44:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-12-23 00:44:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:44:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-23 00:44:09,345 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2020-12-23 00:44:09,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:09,346 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-23 00:44:09,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:44:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-23 00:44:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:44:09,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:09,347 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] [2020-12-23 00:44:09,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:09,563 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:09,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:09,564 INFO L82 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2020-12-23 00:44:09,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:09,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117363462] [2020-12-23 00:44:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:09,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117363462] [2020-12-23 00:44:09,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742321556] [2020-12-23 00:44:09,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:09,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:44:09,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:09,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:09,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:44:09,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083656232] [2020-12-23 00:44:09,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:44:09,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:44:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:44:09,914 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 16 states. [2020-12-23 00:44:09,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:09,984 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-12-23 00:44:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:44:09,984 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-12-23 00:44:09,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:09,986 INFO L225 Difference]: With dead ends: 128 [2020-12-23 00:44:09,986 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 00:44:09,986 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 [2020-12-23 00:44:09,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 00:44:09,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-23 00:44:09,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:44:09,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-12-23 00:44:09,991 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2020-12-23 00:44:09,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:09,992 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-12-23 00:44:09,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:44:09,992 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-12-23 00:44:09,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:44:09,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:09,994 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] [2020-12-23 00:44:10,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:44:10,211 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:10,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2020-12-23 00:44:10,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:10,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497214153] [2020-12-23 00:44:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:10,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497214153] [2020-12-23 00:44:10,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444703433] [2020-12-23 00:44:10,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:10,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:10,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:10,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:44:10,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:10,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:10,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:44:10,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550998378] [2020-12-23 00:44:10,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:44:10,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:10,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:44:10,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:44:10,597 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2020-12-23 00:44:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:10,652 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-12-23 00:44:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:44:10,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-12-23 00:44:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:10,653 INFO L225 Difference]: With dead ends: 130 [2020-12-23 00:44:10,654 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 00:44:10,654 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 [2020-12-23 00:44:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 00:44:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-23 00:44:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 00:44:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-12-23 00:44:10,658 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2020-12-23 00:44:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:10,659 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-12-23 00:44:10,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:44:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-12-23 00:44:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:44:10,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:10,660 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] [2020-12-23 00:44:10,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:44:10,874 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2020-12-23 00:44:10,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:10,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150938633] [2020-12-23 00:44:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:11,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150938633] [2020-12-23 00:44:11,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744158545] [2020-12-23 00:44:11,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:11,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:44:11,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:11,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:44:11,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-23 00:44:11,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:11,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-23 00:44:11,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702686363] [2020-12-23 00:44:11,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:44:11,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:11,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:44:11,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:11,625 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 22 states. [2020-12-23 00:44:11,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:11,793 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2020-12-23 00:44:11,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:44:11,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 79 [2020-12-23 00:44:11,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:11,794 INFO L225 Difference]: With dead ends: 141 [2020-12-23 00:44:11,795 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 00:44:11,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 00:44:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-12-23 00:44:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:44:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-12-23 00:44:11,799 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2020-12-23 00:44:11,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:11,799 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-12-23 00:44:11,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:44:11,799 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-12-23 00:44:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 00:44:11,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:11,800 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] [2020-12-23 00:44:12,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:44:12,014 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:12,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:12,014 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2020-12-23 00:44:12,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:12,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980384255] [2020-12-23 00:44:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:12,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980384255] [2020-12-23 00:44:12,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309033593] [2020-12-23 00:44:12,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:12,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:12,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:12,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:44:12,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:12,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:12,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:44:12,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622965511] [2020-12-23 00:44:12,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:44:12,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:12,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:44:12,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:12,512 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 19 states. [2020-12-23 00:44:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:12,597 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2020-12-23 00:44:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:44:12,598 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-12-23 00:44:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:12,599 INFO L225 Difference]: With dead ends: 146 [2020-12-23 00:44:12,599 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 00:44:12,600 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 [2020-12-23 00:44:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 00:44:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-23 00:44:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:44:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-12-23 00:44:12,606 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2020-12-23 00:44:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:12,606 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-12-23 00:44:12,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:44:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-12-23 00:44:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:44:12,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:12,614 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] [2020-12-23 00:44:12,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:12,829 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:12,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2020-12-23 00:44:12,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:12,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86501709] [2020-12-23 00:44:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:13,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86501709] [2020-12-23 00:44:13,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680625282] [2020-12-23 00:44:13,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:13,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 00:44:13,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:13,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:44:13,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:14,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:14,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:44:14,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448803768] [2020-12-23 00:44:14,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:44:14,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:14,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:44:14,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:44:14,068 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2020-12-23 00:44:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:14,131 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2020-12-23 00:44:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:44:14,131 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-12-23 00:44:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:14,132 INFO L225 Difference]: With dead ends: 148 [2020-12-23 00:44:14,132 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:44:14,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:44:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:44:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:44:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:44:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-12-23 00:44:14,138 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2020-12-23 00:44:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:14,138 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-12-23 00:44:14,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:44:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-12-23 00:44:14,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:44:14,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:14,139 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] [2020-12-23 00:44:14,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:14,353 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:14,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:14,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2020-12-23 00:44:14,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:14,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434675924] [2020-12-23 00:44:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:14,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434675924] [2020-12-23 00:44:14,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593004694] [2020-12-23 00:44:14,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:15,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 00:44:15,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:44:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-12-23 00:44:15,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:15,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-23 00:44:15,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909970936] [2020-12-23 00:44:15,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:44:15,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:15,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:44:15,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:44:15,685 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 26 states. [2020-12-23 00:44:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:15,857 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-12-23 00:44:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:44:15,857 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2020-12-23 00:44:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:15,858 INFO L225 Difference]: With dead ends: 159 [2020-12-23 00:44:15,858 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:44:15,859 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 [2020-12-23 00:44:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:44:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-12-23 00:44:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 00:44:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-12-23 00:44:15,863 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2020-12-23 00:44:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:15,863 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-12-23 00:44:15,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:44:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-12-23 00:44:15,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 00:44:15,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:15,865 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] [2020-12-23 00:44:16,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:44:16,078 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:16,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:16,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2020-12-23 00:44:16,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:16,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537322776] [2020-12-23 00:44:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:16,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537322776] [2020-12-23 00:44:16,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236600208] [2020-12-23 00:44:16,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:16,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:44:16,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:16,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:16,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:44:16,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070718939] [2020-12-23 00:44:16,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:44:16,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:44:16,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:16,598 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 22 states. [2020-12-23 00:44:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:16,680 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2020-12-23 00:44:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:44:16,681 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-12-23 00:44:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:16,682 INFO L225 Difference]: With dead ends: 164 [2020-12-23 00:44:16,682 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 00:44:16,682 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 [2020-12-23 00:44:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 00:44:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-23 00:44:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 00:44:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-12-23 00:44:16,687 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2020-12-23 00:44:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:16,687 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-12-23 00:44:16,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:44:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-12-23 00:44:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:44:16,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:16,689 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] [2020-12-23 00:44:16,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:44:16,904 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:16,904 INFO L82 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2020-12-23 00:44:16,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:16,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544111970] [2020-12-23 00:44:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:17,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544111970] [2020-12-23 00:44:17,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304568291] [2020-12-23 00:44:17,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:17,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:17,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:17,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:44:17,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:17,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:17,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:44:17,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085090286] [2020-12-23 00:44:17,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:44:17,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:17,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:44:17,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:44:17,404 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2020-12-23 00:44:17,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:17,488 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2020-12-23 00:44:17,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:44:17,491 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-12-23 00:44:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:17,491 INFO L225 Difference]: With dead ends: 166 [2020-12-23 00:44:17,492 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 00:44:17,492 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 [2020-12-23 00:44:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 00:44:17,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-23 00:44:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:44:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-12-23 00:44:17,497 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2020-12-23 00:44:17,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:17,497 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-12-23 00:44:17,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:44:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-12-23 00:44:17,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 00:44:17,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:17,498 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] [2020-12-23 00:44:17,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:17,710 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:17,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2020-12-23 00:44:17,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:17,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208844760] [2020-12-23 00:44:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:18,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208844760] [2020-12-23 00:44:18,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796737414] [2020-12-23 00:44:18,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:18,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:44:18,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:18,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:44:18,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-12-23 00:44:18,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:18,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2020-12-23 00:44:18,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594264997] [2020-12-23 00:44:18,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:44:18,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:18,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:44:18,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:44:18,510 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 29 states. [2020-12-23 00:44:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:18,642 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2020-12-23 00:44:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:44:18,642 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 103 [2020-12-23 00:44:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:18,643 INFO L225 Difference]: With dead ends: 171 [2020-12-23 00:44:18,643 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:44:18,644 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 [2020-12-23 00:44:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:44:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-12-23 00:44:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 00:44:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-12-23 00:44:18,649 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2020-12-23 00:44:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:18,649 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-12-23 00:44:18,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:44:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-12-23 00:44:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 00:44:18,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:18,651 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] [2020-12-23 00:44:18,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:44:18,865 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:18,865 INFO L82 PathProgramCache]: Analyzing trace with hash 676687458, now seen corresponding path program 22 times [2020-12-23 00:44:18,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:18,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359612317] [2020-12-23 00:44:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:44:19,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359612317] [2020-12-23 00:44:19,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935434366] [2020-12-23 00:44:19,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:19,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:19,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:19,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:44:19,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-12-23 00:44:19,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:19,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 31 [2020-12-23 00:44:19,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962809441] [2020-12-23 00:44:19,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:44:19,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:44:19,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:19,598 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 31 states. [2020-12-23 00:44:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:19,718 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-12-23 00:44:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:44:19,719 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 107 [2020-12-23 00:44:19,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:19,720 INFO L225 Difference]: With dead ends: 177 [2020-12-23 00:44:19,720 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 00:44:19,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 00:44:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-12-23 00:44:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 00:44:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-12-23 00:44:19,725 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2020-12-23 00:44:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:19,726 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-12-23 00:44:19,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:44:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-12-23 00:44:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 00:44:19,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:19,727 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:19,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:19,941 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:19,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1973169506, now seen corresponding path program 23 times [2020-12-23 00:44:19,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:19,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939447686] [2020-12-23 00:44:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-12-23 00:44:20,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939447686] [2020-12-23 00:44:20,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686318538] [2020-12-23 00:44:20,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:24,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-23 00:44:24,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:24,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:44:24,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-23 00:44:24,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:24,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2020-12-23 00:44:24,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007618304] [2020-12-23 00:44:24,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:44:24,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:24,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:44:24,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:44:24,549 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 32 states. [2020-12-23 00:44:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:24,777 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2020-12-23 00:44:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:44:24,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 111 [2020-12-23 00:44:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:24,779 INFO L225 Difference]: With dead ends: 189 [2020-12-23 00:44:24,779 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 00:44:24,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:44:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 00:44:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-12-23 00:44:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:44:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-12-23 00:44:24,784 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2020-12-23 00:44:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:24,784 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-12-23 00:44:24,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:44:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-12-23 00:44:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:44:24,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:24,786 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 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] [2020-12-23 00:44:25,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:44:25,001 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:25,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:25,002 INFO L82 PathProgramCache]: Analyzing trace with hash 41685082, now seen corresponding path program 24 times [2020-12-23 00:44:25,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:25,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967212527] [2020-12-23 00:44:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 00:44:25,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967212527] [2020-12-23 00:44:25,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337499099] [2020-12-23 00:44:25,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:27,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 00:44:27,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:44:27,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 00:44:27,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:27,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2020-12-23 00:44:27,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141236614] [2020-12-23 00:44:27,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:44:27,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:27,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:44:27,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:44:27,569 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 34 states. [2020-12-23 00:44:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:27,772 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2020-12-23 00:44:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:44:27,773 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 119 [2020-12-23 00:44:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:27,774 INFO L225 Difference]: With dead ends: 203 [2020-12-23 00:44:27,775 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 00:44:27,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:44:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 00:44:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-12-23 00:44:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 00:44:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-12-23 00:44:27,780 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2020-12-23 00:44:27,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:27,780 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-12-23 00:44:27,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:44:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-12-23 00:44:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 00:44:27,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:27,782 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 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] [2020-12-23 00:44:27,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:44:27,996 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 25 times [2020-12-23 00:44:27,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:27,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799565143] [2020-12-23 00:44:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:28,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799565143] [2020-12-23 00:44:28,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465562952] [2020-12-23 00:44:28,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:28,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:44:28,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:28,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:28,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:44:28,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311254703] [2020-12-23 00:44:28,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:44:28,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:28,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:44:28,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:44:28,713 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2020-12-23 00:44:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:28,809 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2020-12-23 00:44:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:44:28,809 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2020-12-23 00:44:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:28,810 INFO L225 Difference]: With dead ends: 208 [2020-12-23 00:44:28,810 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 00:44:28,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:44:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 00:44:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-12-23 00:44:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 00:44:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-12-23 00:44:28,816 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2020-12-23 00:44:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:28,817 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-12-23 00:44:28,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:44:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-12-23 00:44:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-23 00:44:28,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:28,818 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 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] [2020-12-23 00:44:29,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:44:29,032 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:29,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 26 times [2020-12-23 00:44:29,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:29,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961899776] [2020-12-23 00:44:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:29,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961899776] [2020-12-23 00:44:29,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237495772] [2020-12-23 00:44:29,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:29,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:29,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:44:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:29,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:29,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:44:29,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857602126] [2020-12-23 00:44:29,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:44:29,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:29,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:44:29,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:44:29,766 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 29 states. [2020-12-23 00:44:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:29,853 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-12-23 00:44:29,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:44:29,854 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-12-23 00:44:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:29,855 INFO L225 Difference]: With dead ends: 210 [2020-12-23 00:44:29,855 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 00:44:29,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:44:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 00:44:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-23 00:44:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 00:44:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-12-23 00:44:29,861 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2020-12-23 00:44:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:29,861 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-12-23 00:44:29,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:44:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-12-23 00:44:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 00:44:29,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:29,863 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 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] [2020-12-23 00:44:30,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:44:30,076 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:30,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1805967086, now seen corresponding path program 27 times [2020-12-23 00:44:30,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:30,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124642559] [2020-12-23 00:44:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:30,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124642559] [2020-12-23 00:44:30,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518187383] [2020-12-23 00:44:30,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:31,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:44:31,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:31,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:44:31,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2020-12-23 00:44:31,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:31,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2020-12-23 00:44:31,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942384740] [2020-12-23 00:44:31,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:44:31,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:31,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:44:31,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:44:31,353 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 37 states. [2020-12-23 00:44:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:31,547 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2020-12-23 00:44:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:44:31,547 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 131 [2020-12-23 00:44:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:31,548 INFO L225 Difference]: With dead ends: 215 [2020-12-23 00:44:31,548 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 00:44:31,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:44:31,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 00:44:31,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-12-23 00:44:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 00:44:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-12-23 00:44:31,554 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 131 [2020-12-23 00:44:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:31,554 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-12-23 00:44:31,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:44:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-12-23 00:44:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:44:31,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:31,556 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:31,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:31,771 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:31,772 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 28 times [2020-12-23 00:44:31,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:31,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726942901] [2020-12-23 00:44:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:44:32,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726942901] [2020-12-23 00:44:32,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363309449] [2020-12-23 00:44:32,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:32,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:32,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:32,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:44:32,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:44:32,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:32,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 00:44:32,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689456901] [2020-12-23 00:44:32,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:44:32,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:32,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:44:32,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:32,563 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2020-12-23 00:44:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:32,686 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2020-12-23 00:44:32,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:44:32,687 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2020-12-23 00:44:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:32,687 INFO L225 Difference]: With dead ends: 218 [2020-12-23 00:44:32,688 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 00:44:32,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 00:44:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-12-23 00:44:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 00:44:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-12-23 00:44:32,693 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2020-12-23 00:44:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:32,693 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-12-23 00:44:32,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:44:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-12-23 00:44:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-23 00:44:32,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:32,695 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:32,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:32,911 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 29 times [2020-12-23 00:44:32,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:32,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112272888] [2020-12-23 00:44:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:44:33,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112272888] [2020-12-23 00:44:33,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897539658] [2020-12-23 00:44:33,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:35,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-23 00:44:35,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:35,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:44:35,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2020-12-23 00:44:36,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:36,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2020-12-23 00:44:36,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450177717] [2020-12-23 00:44:36,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:44:36,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:36,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:44:36,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:44:36,031 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2020-12-23 00:44:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:36,229 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2020-12-23 00:44:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:44:36,230 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2020-12-23 00:44:36,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:36,231 INFO L225 Difference]: With dead ends: 223 [2020-12-23 00:44:36,231 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 00:44:36,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:44:36,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 00:44:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-12-23 00:44:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 00:44:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-12-23 00:44:36,237 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 137 [2020-12-23 00:44:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:36,238 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-12-23 00:44:36,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:44:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-12-23 00:44:36,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-23 00:44:36,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:36,239 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:36,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:36,455 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1798907208, now seen corresponding path program 30 times [2020-12-23 00:44:36,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:36,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018823691] [2020-12-23 00:44:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-12-23 00:44:37,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018823691] [2020-12-23 00:44:37,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167314731] [2020-12-23 00:44:37,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:38,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 00:44:38,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:38,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:44:38,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-12-23 00:44:39,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:39,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2020-12-23 00:44:39,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657052510] [2020-12-23 00:44:39,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:44:39,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:39,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:44:39,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:44:39,127 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 41 states. [2020-12-23 00:44:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:39,493 INFO L93 Difference]: Finished difference Result 235 states and 246 transitions. [2020-12-23 00:44:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:44:39,494 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 141 [2020-12-23 00:44:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:39,495 INFO L225 Difference]: With dead ends: 235 [2020-12-23 00:44:39,495 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 00:44:39,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:44:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 00:44:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-12-23 00:44:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 00:44:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-12-23 00:44:39,501 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 141 [2020-12-23 00:44:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:39,501 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-12-23 00:44:39,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:44:39,501 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-12-23 00:44:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-23 00:44:39,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:39,502 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 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] [2020-12-23 00:44:39,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:44:39,712 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:39,713 INFO L82 PathProgramCache]: Analyzing trace with hash 308754692, now seen corresponding path program 31 times [2020-12-23 00:44:39,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:39,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205891777] [2020-12-23 00:44:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:44:40,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205891777] [2020-12-23 00:44:40,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107788111] [2020-12-23 00:44:40,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:40,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:44:40,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:44:40,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:40,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 00:44:40,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240479188] [2020-12-23 00:44:40,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:44:40,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:44:40,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:44:40,682 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 34 states. [2020-12-23 00:44:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:40,788 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2020-12-23 00:44:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:44:40,788 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2020-12-23 00:44:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:40,789 INFO L225 Difference]: With dead ends: 240 [2020-12-23 00:44:40,789 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 00:44:40,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:44:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 00:44:40,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-12-23 00:44:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 00:44:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-12-23 00:44:40,793 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2020-12-23 00:44:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:40,794 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-12-23 00:44:40,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:44:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-12-23 00:44:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 00:44:40,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:40,795 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 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] [2020-12-23 00:44:41,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:41,010 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:41,011 INFO L82 PathProgramCache]: Analyzing trace with hash -747071166, now seen corresponding path program 32 times [2020-12-23 00:44:41,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:41,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847281910] [2020-12-23 00:44:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:44:41,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847281910] [2020-12-23 00:44:41,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467003802] [2020-12-23 00:44:41,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:41,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:41,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:44:41,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:44:41,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:41,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 00:44:41,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48503446] [2020-12-23 00:44:41,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:44:41,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:41,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:44:41,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:44:41,983 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 35 states. [2020-12-23 00:44:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:42,120 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2020-12-23 00:44:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:44:42,120 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 151 [2020-12-23 00:44:42,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:42,121 INFO L225 Difference]: With dead ends: 242 [2020-12-23 00:44:42,121 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 00:44:42,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:44:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 00:44:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-12-23 00:44:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 00:44:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2020-12-23 00:44:42,128 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2020-12-23 00:44:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:42,128 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2020-12-23 00:44:42,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:44:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2020-12-23 00:44:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 00:44:42,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:42,129 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 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] [2020-12-23 00:44:42,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:44:42,343 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1783438848, now seen corresponding path program 33 times [2020-12-23 00:44:42,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:42,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082200525] [2020-12-23 00:44:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:44:43,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082200525] [2020-12-23 00:44:43,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140940269] [2020-12-23 00:44:43,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:44,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:44:44,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:44,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:44:44,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2020-12-23 00:44:44,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:44,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 12] total 45 [2020-12-23 00:44:44,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148584005] [2020-12-23 00:44:44,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:44:44,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:44,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:44:44,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:44:44,694 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 45 states. [2020-12-23 00:44:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:45,107 INFO L93 Difference]: Finished difference Result 253 states and 264 transitions. [2020-12-23 00:44:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:44:45,108 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 153 [2020-12-23 00:44:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:45,109 INFO L225 Difference]: With dead ends: 253 [2020-12-23 00:44:45,109 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 00:44:45,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:44:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 00:44:45,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-12-23 00:44:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 00:44:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-12-23 00:44:45,115 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 153 [2020-12-23 00:44:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:45,116 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-12-23 00:44:45,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:44:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-12-23 00:44:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-23 00:44:45,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:45,117 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 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] [2020-12-23 00:44:45,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:45,333 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 34 times [2020-12-23 00:44:45,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:45,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507845602] [2020-12-23 00:44:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-12-23 00:44:46,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507845602] [2020-12-23 00:44:46,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547645595] [2020-12-23 00:44:46,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:46,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:46,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:46,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:44:46,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2020-12-23 00:44:46,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:46,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2020-12-23 00:44:46,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545470084] [2020-12-23 00:44:46,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:44:46,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:44:46,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:44:46,663 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 47 states. [2020-12-23 00:44:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:47,008 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2020-12-23 00:44:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:44:47,009 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 161 [2020-12-23 00:44:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:47,010 INFO L225 Difference]: With dead ends: 267 [2020-12-23 00:44:47,010 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 00:44:47,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:44:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 00:44:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2020-12-23 00:44:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 00:44:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2020-12-23 00:44:47,016 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2020-12-23 00:44:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:47,017 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2020-12-23 00:44:47,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:44:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2020-12-23 00:44:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-23 00:44:47,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:47,018 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 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] [2020-12-23 00:44:47,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:44:47,234 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:47,235 INFO L82 PathProgramCache]: Analyzing trace with hash -628416392, now seen corresponding path program 35 times [2020-12-23 00:44:47,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:47,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470919887] [2020-12-23 00:44:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2020-12-23 00:44:48,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470919887] [2020-12-23 00:44:48,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653218311] [2020-12-23 00:44:48,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:37,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-23 00:45:37,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:37,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:45:37,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2020-12-23 00:45:37,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:37,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2020-12-23 00:45:37,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515853889] [2020-12-23 00:45:37,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 00:45:37,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 00:45:37,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:45:37,623 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 49 states. [2020-12-23 00:45:38,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:38,072 INFO L93 Difference]: Finished difference Result 281 states and 292 transitions. [2020-12-23 00:45:38,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 00:45:38,072 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2020-12-23 00:45:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:38,074 INFO L225 Difference]: With dead ends: 281 [2020-12-23 00:45:38,074 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 00:45:38,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:45:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 00:45:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2020-12-23 00:45:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 00:45:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2020-12-23 00:45:38,081 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2020-12-23 00:45:38,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:38,081 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2020-12-23 00:45:38,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 00:45:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2020-12-23 00:45:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-23 00:45:38,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:38,082 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:38,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:45:38,297 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:38,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1809286964, now seen corresponding path program 36 times [2020-12-23 00:45:38,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:38,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101948637] [2020-12-23 00:45:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2020-12-23 00:45:39,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101948637] [2020-12-23 00:45:39,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673217774] [2020-12-23 00:45:39,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:43,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:45:43,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:43,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:45:43,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2020-12-23 00:45:43,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:43,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2020-12-23 00:45:43,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486273601] [2020-12-23 00:45:43,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:45:43,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:45:43,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:45:43,800 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 48 states. [2020-12-23 00:45:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:44,077 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2020-12-23 00:45:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:45:44,078 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 177 [2020-12-23 00:45:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:44,079 INFO L225 Difference]: With dead ends: 289 [2020-12-23 00:45:44,079 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 00:45:44,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:45:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 00:45:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-12-23 00:45:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 00:45:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2020-12-23 00:45:44,086 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 177 [2020-12-23 00:45:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:44,086 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2020-12-23 00:45:44,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:45:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2020-12-23 00:45:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-23 00:45:44,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:44,088 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:44,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:45:44,303 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:44,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1693026416, now seen corresponding path program 37 times [2020-12-23 00:45:44,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:44,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522796871] [2020-12-23 00:45:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:45:45,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522796871] [2020-12-23 00:45:45,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065742811] [2020-12-23 00:45:45,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:45:45,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:45:45,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:45,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 00:45:45,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625724227] [2020-12-23 00:45:45,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:45:45,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:45:45,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:45:45,672 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 40 states. [2020-12-23 00:45:45,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:45,837 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2020-12-23 00:45:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:45:45,840 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 181 [2020-12-23 00:45:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:45,841 INFO L225 Difference]: With dead ends: 292 [2020-12-23 00:45:45,841 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 00:45:45,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:45:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 00:45:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-12-23 00:45:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 00:45:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2020-12-23 00:45:45,846 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2020-12-23 00:45:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:45,847 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2020-12-23 00:45:45,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:45:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2020-12-23 00:45:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-23 00:45:45,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:45,848 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:46,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:45:46,061 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:46,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:46,062 INFO L82 PathProgramCache]: Analyzing trace with hash 45772974, now seen corresponding path program 38 times [2020-12-23 00:45:46,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:46,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160472546] [2020-12-23 00:45:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:45:47,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160472546] [2020-12-23 00:45:47,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668766023] [2020-12-23 00:45:47,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:47,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:45:47,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:47,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:45:47,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:45:47,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:47,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 00:45:47,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265110278] [2020-12-23 00:45:47,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:45:47,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:47,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:45:47,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:45:47,425 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 41 states. [2020-12-23 00:45:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:47,572 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2020-12-23 00:45:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:45:47,575 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 183 [2020-12-23 00:45:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:47,576 INFO L225 Difference]: With dead ends: 294 [2020-12-23 00:45:47,576 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 00:45:47,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:45:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 00:45:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-12-23 00:45:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 00:45:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2020-12-23 00:45:47,582 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2020-12-23 00:45:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:47,582 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2020-12-23 00:45:47,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:45:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2020-12-23 00:45:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-23 00:45:47,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:47,583 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:47,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:47,784 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:47,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1878147436, now seen corresponding path program 39 times [2020-12-23 00:45:47,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:47,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565111389] [2020-12-23 00:45:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:45:48,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565111389] [2020-12-23 00:45:48,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216712791] [2020-12-23 00:45:48,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:49,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 00:45:49,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:49,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:45:49,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2020-12-23 00:45:50,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:50,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2020-12-23 00:45:50,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620653944] [2020-12-23 00:45:50,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 00:45:50,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:50,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 00:45:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:45:50,561 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 52 states. [2020-12-23 00:45:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:50,872 INFO L93 Difference]: Finished difference Result 299 states and 308 transitions. [2020-12-23 00:45:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 00:45:50,873 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 185 [2020-12-23 00:45:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:50,874 INFO L225 Difference]: With dead ends: 299 [2020-12-23 00:45:50,874 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 00:45:50,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:45:50,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 00:45:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-12-23 00:45:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 00:45:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2020-12-23 00:45:50,881 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 185 [2020-12-23 00:45:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:50,882 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2020-12-23 00:45:50,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 00:45:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2020-12-23 00:45:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-23 00:45:50,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:50,883 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:51,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 00:45:51,099 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:51,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1682311512, now seen corresponding path program 40 times [2020-12-23 00:45:51,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:51,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141711119] [2020-12-23 00:45:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-23 00:45:52,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141711119] [2020-12-23 00:45:52,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981454187] [2020-12-23 00:45:52,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:52,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:45:52,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:52,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:45:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2020-12-23 00:45:53,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:53,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2020-12-23 00:45:53,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585508965] [2020-12-23 00:45:53,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 00:45:53,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:53,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 00:45:53,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:45:53,031 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 54 states. [2020-12-23 00:45:53,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:53,315 INFO L93 Difference]: Finished difference Result 305 states and 314 transitions. [2020-12-23 00:45:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 00:45:53,316 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 189 [2020-12-23 00:45:53,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:53,317 INFO L225 Difference]: With dead ends: 305 [2020-12-23 00:45:53,317 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 00:45:53,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:45:53,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 00:45:53,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-12-23 00:45:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 00:45:53,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2020-12-23 00:45:53,323 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 189 [2020-12-23 00:45:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:53,324 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2020-12-23 00:45:53,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 00:45:53,324 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2020-12-23 00:45:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-12-23 00:45:53,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:53,325 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:53,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:53,528 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:53,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1750482404, now seen corresponding path program 41 times [2020-12-23 00:45:53,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:53,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131652766] [2020-12-23 00:45:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 00:45:54,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131652766] [2020-12-23 00:45:54,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110551501] [2020-12-23 00:45:54,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:39,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-23 00:46:39,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:39,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 00:46:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 00:46:39,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:39,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 00:46:39,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954945154] [2020-12-23 00:46:39,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 00:46:39,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:39,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 00:46:39,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:46:39,423 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 44 states. [2020-12-23 00:46:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:39,593 INFO L93 Difference]: Finished difference Result 308 states and 316 transitions. [2020-12-23 00:46:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 00:46:39,594 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 193 [2020-12-23 00:46:39,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:39,595 INFO L225 Difference]: With dead ends: 308 [2020-12-23 00:46:39,595 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 00:46:39,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:46:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 00:46:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-12-23 00:46:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-23 00:46:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2020-12-23 00:46:39,602 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2020-12-23 00:46:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:39,602 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2020-12-23 00:46:39,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 00:46:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2020-12-23 00:46:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-12-23 00:46:39,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:39,603 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:39,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:39,817 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:39,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:39,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1338423586, now seen corresponding path program 42 times [2020-12-23 00:46:39,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:39,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482748238] [2020-12-23 00:46:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 00:46:41,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482748238] [2020-12-23 00:46:41,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971676774] [2020-12-23 00:46:41,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:03,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 00:47:03,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:47:03,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:47:03,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2113 trivial. 0 not checked. [2020-12-23 00:47:04,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:47:04,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 15] total 57 [2020-12-23 00:47:04,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337002907] [2020-12-23 00:47:04,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 00:47:04,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:04,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 00:47:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=2142, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 00:47:04,372 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 57 states. [2020-12-23 00:47:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:04,899 INFO L93 Difference]: Finished difference Result 319 states and 330 transitions. [2020-12-23 00:47:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 00:47:04,900 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 195 [2020-12-23 00:47:04,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:04,901 INFO L225 Difference]: With dead ends: 319 [2020-12-23 00:47:04,901 INFO L226 Difference]: Without dead ends: 208 [2020-12-23 00:47:04,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1050, Invalid=2142, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 00:47:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-23 00:47:04,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-12-23 00:47:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-23 00:47:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2020-12-23 00:47:04,907 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 195 [2020-12-23 00:47:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:04,908 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2020-12-23 00:47:04,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 00:47:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2020-12-23 00:47:04,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-12-23 00:47:04,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:04,909 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:05,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 00:47:05,110 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:05,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:05,113 INFO L82 PathProgramCache]: Analyzing trace with hash -237861922, now seen corresponding path program 43 times [2020-12-23 00:47:05,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:05,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415904616] [2020-12-23 00:47:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:47:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 00:47:06,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415904616] [2020-12-23 00:47:06,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966920510] [2020-12-23 00:47:06,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:47:06,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 00:47:06,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 00:47:06,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:47:06,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 00:47:06,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945546904] [2020-12-23 00:47:06,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 00:47:06,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:06,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 00:47:06,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:47:06,775 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand 46 states. [2020-12-23 00:47:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:06,959 INFO L93 Difference]: Finished difference Result 324 states and 332 transitions. [2020-12-23 00:47:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:47:06,960 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 203 [2020-12-23 00:47:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:06,961 INFO L225 Difference]: With dead ends: 324 [2020-12-23 00:47:06,961 INFO L226 Difference]: Without dead ends: 207 [2020-12-23 00:47:06,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:47:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-23 00:47:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2020-12-23 00:47:06,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-23 00:47:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2020-12-23 00:47:06,968 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 203 [2020-12-23 00:47:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:06,969 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2020-12-23 00:47:06,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 00:47:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2020-12-23 00:47:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-12-23 00:47:06,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:06,970 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:07,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 00:47:07,184 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:07,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1049135516, now seen corresponding path program 44 times [2020-12-23 00:47:07,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:07,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018458415] [2020-12-23 00:47:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:47:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 00:47:08,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018458415] [2020-12-23 00:47:08,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641936317] [2020-12-23 00:47:08,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:08,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:47:08,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:47:08,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 00:47:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 00:47:08,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:47:08,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 00:47:08,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412222598] [2020-12-23 00:47:08,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:47:08,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:08,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:47:08,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:47:08,923 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand 47 states. [2020-12-23 00:47:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:09,134 INFO L93 Difference]: Finished difference Result 326 states and 334 transitions. [2020-12-23 00:47:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 00:47:09,135 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 205 [2020-12-23 00:47:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:09,136 INFO L225 Difference]: With dead ends: 326 [2020-12-23 00:47:09,136 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 00:47:09,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:47:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 00:47:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-12-23 00:47:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-23 00:47:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2020-12-23 00:47:09,142 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 205 [2020-12-23 00:47:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:09,143 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2020-12-23 00:47:09,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:47:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2020-12-23 00:47:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-12-23 00:47:09,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:09,144 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:09,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 00:47:09,359 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:09,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:09,359 INFO L82 PathProgramCache]: Analyzing trace with hash 903092186, now seen corresponding path program 45 times [2020-12-23 00:47:09,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:09,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498081958] [2020-12-23 00:47:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:47:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 00:47:10,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498081958] [2020-12-23 00:47:10,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609302113] [2020-12-23 00:47:10,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:14,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-23 00:47:14,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:47:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:47:14,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2443 trivial. 0 not checked. [2020-12-23 00:47:15,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:47:15,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 15] total 60 [2020-12-23 00:47:15,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883228201] [2020-12-23 00:47:15,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 00:47:15,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 00:47:15,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=2355, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 00:47:15,082 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand 60 states. [2020-12-23 00:47:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:15,424 INFO L93 Difference]: Finished difference Result 331 states and 340 transitions. [2020-12-23 00:47:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 00:47:15,425 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 207 [2020-12-23 00:47:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:15,426 INFO L225 Difference]: With dead ends: 331 [2020-12-23 00:47:15,426 INFO L226 Difference]: Without dead ends: 214 [2020-12-23 00:47:15,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1185, Invalid=2355, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 00:47:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-23 00:47:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-12-23 00:47:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-23 00:47:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2020-12-23 00:47:15,432 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 207 [2020-12-23 00:47:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:15,433 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2020-12-23 00:47:15,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 00:47:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2020-12-23 00:47:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-23 00:47:15,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:15,434 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:15,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:15,649 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:15,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1269421846, now seen corresponding path program 46 times [2020-12-23 00:47:15,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:15,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692461701] [2020-12-23 00:47:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:47:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 00:47:17,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692461701] [2020-12-23 00:47:17,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246858606] [2020-12-23 00:47:17,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:17,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:47:17,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:47:17,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 00:47:17,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 00:47:17,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:47:17,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 00:47:17,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209530217] [2020-12-23 00:47:17,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 00:47:17,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:17,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 00:47:17,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:47:17,542 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand 49 states. [2020-12-23 00:47:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:17,754 INFO L93 Difference]: Finished difference Result 334 states and 342 transitions. [2020-12-23 00:47:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:47:17,759 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 211 [2020-12-23 00:47:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:17,760 INFO L225 Difference]: With dead ends: 334 [2020-12-23 00:47:17,760 INFO L226 Difference]: Without dead ends: 215 [2020-12-23 00:47:17,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:47:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-23 00:47:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2020-12-23 00:47:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-23 00:47:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2020-12-23 00:47:17,766 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 211 [2020-12-23 00:47:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:17,767 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2020-12-23 00:47:17,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 00:47:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2020-12-23 00:47:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-12-23 00:47:17,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:17,768 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:17,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 00:47:17,984 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:17,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:17,985 INFO L82 PathProgramCache]: Analyzing trace with hash -480952620, now seen corresponding path program 47 times [2020-12-23 00:47:17,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:17,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818210034] [2020-12-23 00:47:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:47:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 00:47:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818210034] [2020-12-23 00:47:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252926115] [2020-12-23 00:47:19,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true