/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-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:20:54,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:20:54,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:20:54,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:20:54,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:20:54,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:20:54,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:20:54,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:20:54,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:20:54,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:20:54,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:20:54,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:20:54,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:20:54,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:20:54,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:20:54,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:20:54,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:20:54,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:20:54,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:20:54,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:20:54,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:20:54,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:20:54,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:20:54,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:20:54,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:20:54,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:20:54,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:20:54,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:20:54,984 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 00:20:55,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:20:55,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:20:55,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:20:55,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:20:55,036 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:20:55,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:20:55,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:20:55,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:20:55,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:20:55,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:20:55,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:20:55,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:20:55,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:20:55,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:20:55,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:20:55,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:20:55,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:20:55,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:20:55,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:20:55,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:20:55,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:20:55,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:20:55,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:20:55,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:20:55,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:20:55,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:20:55,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:20:55,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:20:55,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:20:55,528 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:20:55,528 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:20:55,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2020-12-23 00:20:55,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/32ed39c1b/a14491debc6544cd97954692a2d8b130/FLAGd267ea2f1 [2020-12-23 00:20:56,321 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:20:56,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2020-12-23 00:20:56,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/32ed39c1b/a14491debc6544cd97954692a2d8b130/FLAGd267ea2f1 [2020-12-23 00:20:56,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/32ed39c1b/a14491debc6544cd97954692a2d8b130 [2020-12-23 00:20:56,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:20:56,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:20:56,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:20:56,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:20:56,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:20:56,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:20:56" (1/1) ... [2020-12-23 00:20:56,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@728bba4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:56, skipping insertion in model container [2020-12-23 00:20:56,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:20:56" (1/1) ... [2020-12-23 00:20:56,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:20:56,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:20:56,955 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-industry-pattern/check_removal_from_set_after_insertion.c[342,355] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~set,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~set,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~size,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~set~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~values~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~element~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~found~0,] left hand side expression in assignment: lhs: VariableLHS[~pos~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~set~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2020-12-23 00:20:56,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:20:57,003 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:20:57,016 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-industry-pattern/check_removal_from_set_after_insertion.c[342,355] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~set,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~set,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~size,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#set~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#set~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#values~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#values~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~element~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~found~0,] left hand side expression in assignment: lhs: VariableLHS[~pos~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#set~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#set~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2020-12-23 00:20:57,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:20:57,050 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:20:57,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57 WrapperNode [2020-12-23 00:20:57,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:20:57,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:20:57,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:20:57,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:20:57,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57" (1/1) ... [2020-12-23 00:20:57,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57" (1/1) ... [2020-12-23 00:20:57,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:20:57,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:20:57,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:20:57,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:20:57,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57" (1/1) ... [2020-12-23 00:20:57,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57" (1/1) ... [2020-12-23 00:20:57,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57" (1/1) ... [2020-12-23 00:20:57,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57" (1/1) ... [2020-12-23 00:20:57,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57" (1/1) ... [2020-12-23 00:20:57,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57" (1/1) ... [2020-12-23 00:20:57,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57" (1/1) ... [2020-12-23 00:20:57,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:20:57,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:20:57,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:20:57,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:20:57,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57" (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 00:20:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:20:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:20:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:20:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:20:57,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:20:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:20:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:20:57,733 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:20:57,733 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-23 00:20:57,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:20:57 BoogieIcfgContainer [2020-12-23 00:20:57,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:20:57,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:20:57,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:20:57,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:20:57,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:20:56" (1/3) ... [2020-12-23 00:20:57,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b1b8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:20:57, skipping insertion in model container [2020-12-23 00:20:57,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:20:57" (2/3) ... [2020-12-23 00:20:57,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b1b8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:20:57, skipping insertion in model container [2020-12-23 00:20:57,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:20:57" (3/3) ... [2020-12-23 00:20:57,745 INFO L111 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2020-12-23 00:20:57,752 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:20:57,757 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:20:57,781 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:20:57,820 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:20:57,820 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:20:57,820 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:20:57,821 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:20:57,821 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:20:57,821 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:20:57,821 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:20:57,821 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:20:57,836 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-23 00:20:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 00:20:57,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:57,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:57,843 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:57,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:57,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1525882359, now seen corresponding path program 1 times [2020-12-23 00:20:57,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:57,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043860233] [2020-12-23 00:20:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:58,181 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 00:20:58,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043860233] [2020-12-23 00:20:58,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:20:58,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:20:58,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627386996] [2020-12-23 00:20:58,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:20:58,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:58,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:20:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:20:58,219 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-12-23 00:20:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:58,385 INFO L93 Difference]: Finished difference Result 77 states and 118 transitions. [2020-12-23 00:20:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:20:58,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 00:20:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:58,402 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:20:58,402 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 00:20:58,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:20:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 00:20:58,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-12-23 00:20:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:20:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-12-23 00:20:58,468 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 12 [2020-12-23 00:20:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:58,469 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-12-23 00:20:58,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:20:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-12-23 00:20:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:20:58,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:58,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:58,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:20:58,474 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:58,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1053753351, now seen corresponding path program 1 times [2020-12-23 00:20:58,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:58,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139577874] [2020-12-23 00:20:58,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:58,622 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 00:20:58,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139577874] [2020-12-23 00:20:58,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:20:58,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:20:58,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31166940] [2020-12-23 00:20:58,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:20:58,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:58,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:20:58,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:20:58,631 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 4 states. [2020-12-23 00:20:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:58,712 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-12-23 00:20:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:20:58,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 00:20:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:58,715 INFO L225 Difference]: With dead ends: 52 [2020-12-23 00:20:58,715 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 00:20:58,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:20:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 00:20:58,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-12-23 00:20:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:20:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2020-12-23 00:20:58,724 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 14 [2020-12-23 00:20:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:58,725 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2020-12-23 00:20:58,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:20:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-12-23 00:20:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:20:58,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:58,727 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] [2020-12-23 00:20:58,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:20:58,727 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:58,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1072948653, now seen corresponding path program 1 times [2020-12-23 00:20:58,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:58,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628809225] [2020-12-23 00:20:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:20:58,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628809225] [2020-12-23 00:20:58,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:20:58,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:20:58,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351339080] [2020-12-23 00:20:58,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:20:58,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:58,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:20:58,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:20:58,809 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 4 states. [2020-12-23 00:20:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:58,860 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-12-23 00:20:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:20:58,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-23 00:20:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:58,862 INFO L225 Difference]: With dead ends: 90 [2020-12-23 00:20:58,862 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 00:20:58,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:20:58,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 00:20:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2020-12-23 00:20:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:20:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2020-12-23 00:20:58,874 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 20 [2020-12-23 00:20:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:58,875 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2020-12-23 00:20:58,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:20:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2020-12-23 00:20:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:20:58,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:58,876 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] [2020-12-23 00:20:58,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 00:20:58,877 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:58,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1602550877, now seen corresponding path program 1 times [2020-12-23 00:20:58,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:58,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020170770] [2020-12-23 00:20:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:20:58,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020170770] [2020-12-23 00:20:58,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:20:58,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:20:58,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118222734] [2020-12-23 00:20:58,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:20:58,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:58,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:20:58,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:20:58,946 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand 4 states. [2020-12-23 00:20:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:58,984 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-12-23 00:20:58,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:20:58,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-23 00:20:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:58,985 INFO L225 Difference]: With dead ends: 82 [2020-12-23 00:20:58,986 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 00:20:58,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:20:58,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 00:20:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2020-12-23 00:20:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:20:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-12-23 00:20:58,996 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-12-23 00:20:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:58,996 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-12-23 00:20:58,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:20:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-12-23 00:20:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:20:58,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:58,998 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] [2020-12-23 00:20:58,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 00:20:58,998 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:58,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:58,999 INFO L82 PathProgramCache]: Analyzing trace with hash -969039925, now seen corresponding path program 1 times [2020-12-23 00:20:58,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:59,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256659493] [2020-12-23 00:20:59,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:20:59,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256659493] [2020-12-23 00:20:59,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:20:59,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:20:59,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638202612] [2020-12-23 00:20:59,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:20:59,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:59,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:20:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:20:59,061 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 3 states. [2020-12-23 00:20:59,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:59,086 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-12-23 00:20:59,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:20:59,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-23 00:20:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:59,087 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:20:59,087 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:20:59,088 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 00:20:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:20:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 00:20:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 00:20:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-12-23 00:20:59,097 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 21 [2020-12-23 00:20:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:59,097 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-12-23 00:20:59,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:20:59,098 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-12-23 00:20:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:20:59,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:59,099 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 00:20:59,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 00:20:59,100 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1842211539, now seen corresponding path program 1 times [2020-12-23 00:20:59,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:59,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246196041] [2020-12-23 00:20:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:20:59,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246196041] [2020-12-23 00:20:59,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688099286] [2020-12-23 00:20:59,211 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 00:20:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:59,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:20:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:20:59,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:59,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:20:59,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906380016] [2020-12-23 00:20:59,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:20:59,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:20:59,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:20:59,394 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 7 states. [2020-12-23 00:20:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:59,536 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2020-12-23 00:20:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:20:59,537 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-12-23 00:20:59,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:59,538 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:20:59,539 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 00:20:59,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:20:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 00:20:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 45. [2020-12-23 00:20:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 00:20:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-12-23 00:20:59,549 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 25 [2020-12-23 00:20:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:59,550 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-12-23 00:20:59,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:20:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-12-23 00:20:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:20:59,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:59,551 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:59,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:20:59,765 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:59,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:59,767 INFO L82 PathProgramCache]: Analyzing trace with hash -552134993, now seen corresponding path program 2 times [2020-12-23 00:20:59,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:59,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326019805] [2020-12-23 00:20:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:20:59,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326019805] [2020-12-23 00:20:59,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:20:59,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:20:59,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651661877] [2020-12-23 00:20:59,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:20:59,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:59,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:20:59,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:20:59,817 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 3 states. [2020-12-23 00:20:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:59,830 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2020-12-23 00:20:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:20:59,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-23 00:20:59,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:59,833 INFO L225 Difference]: With dead ends: 60 [2020-12-23 00:20:59,833 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 00:20:59,834 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 00:20:59,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 00:20:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 00:20:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 00:20:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-12-23 00:20:59,851 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 30 [2020-12-23 00:20:59,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:59,852 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-12-23 00:20:59,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:20:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-12-23 00:20:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:20:59,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:59,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 00:20:59,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 00:20:59,860 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:59,861 INFO L82 PathProgramCache]: Analyzing trace with hash -293969555, now seen corresponding path program 1 times [2020-12-23 00:20:59,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:59,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843085351] [2020-12-23 00:20:59,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:20:59,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843085351] [2020-12-23 00:20:59,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232389010] [2020-12-23 00:20:59,977 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 00:21:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:00,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:21:00,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:21:00,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:00,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 00:21:00,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823026613] [2020-12-23 00:21:00,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:21:00,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:00,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:21:00,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:21:00,124 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 9 states. [2020-12-23 00:21:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:00,267 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-12-23 00:21:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:21:00,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-12-23 00:21:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:00,268 INFO L225 Difference]: With dead ends: 115 [2020-12-23 00:21:00,268 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 00:21:00,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:21:00,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 00:21:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-12-23 00:21:00,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 00:21:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-23 00:21:00,278 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 30 [2020-12-23 00:21:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:00,278 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-23 00:21:00,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:21:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-23 00:21:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:21:00,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:00,280 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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 00:21:00,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:00,494 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash 622364399, now seen corresponding path program 2 times [2020-12-23 00:21:00,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:00,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602232649] [2020-12-23 00:21:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:21:00,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602232649] [2020-12-23 00:21:00,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415999470] [2020-12-23 00:21:00,593 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 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 00:21:00,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:21:00,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:00,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:21:00,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:21:00,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:00,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 00:21:00,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562299912] [2020-12-23 00:21:00,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:21:00,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:00,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:21:00,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:21:00,774 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 11 states. [2020-12-23 00:21:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:00,897 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2020-12-23 00:21:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:21:00,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-12-23 00:21:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:00,900 INFO L225 Difference]: With dead ends: 129 [2020-12-23 00:21:00,900 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 00:21:00,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:21:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 00:21:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 49. [2020-12-23 00:21:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 00:21:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-12-23 00:21:00,909 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 32 [2020-12-23 00:21:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:00,910 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-12-23 00:21:00,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:21:00,910 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-12-23 00:21:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 00:21:00,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:00,911 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 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 00:21:01,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:01,125 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:01,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:01,126 INFO L82 PathProgramCache]: Analyzing trace with hash 750998513, now seen corresponding path program 3 times [2020-12-23 00:21:01,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:01,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14740892] [2020-12-23 00:21:01,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:21:01,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14740892] [2020-12-23 00:21:01,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838343157] [2020-12-23 00:21:01,201 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 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 00:21:01,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:21:01,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:01,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:21:01,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 00:21:01,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:01,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2020-12-23 00:21:01,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431947912] [2020-12-23 00:21:01,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:21:01,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:01,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:21:01,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:21:01,368 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 10 states. [2020-12-23 00:21:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:01,584 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2020-12-23 00:21:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:21:01,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-23 00:21:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:01,586 INFO L225 Difference]: With dead ends: 159 [2020-12-23 00:21:01,586 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 00:21:01,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:21:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 00:21:01,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 57. [2020-12-23 00:21:01,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 00:21:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-12-23 00:21:01,595 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 34 [2020-12-23 00:21:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:01,596 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-12-23 00:21:01,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:21:01,596 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-12-23 00:21:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 00:21:01,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:01,597 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 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 00:21:01,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:01,811 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:01,812 INFO L82 PathProgramCache]: Analyzing trace with hash 590995391, now seen corresponding path program 1 times [2020-12-23 00:21:01,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:01,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712679077] [2020-12-23 00:21:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:21:01,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712679077] [2020-12-23 00:21:01,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073200144] [2020-12-23 00:21:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:01,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:21:01,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:21:02,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:02,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 00:21:02,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619818370] [2020-12-23 00:21:02,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:21:02,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:02,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:21:02,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:21:02,092 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 15 states. [2020-12-23 00:21:02,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:02,271 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2020-12-23 00:21:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:21:02,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-12-23 00:21:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:02,273 INFO L225 Difference]: With dead ends: 169 [2020-12-23 00:21:02,273 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 00:21:02,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:21:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 00:21:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 59. [2020-12-23 00:21:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:21:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-12-23 00:21:02,282 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 42 [2020-12-23 00:21:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:02,282 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-12-23 00:21:02,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:21:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-12-23 00:21:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 00:21:02,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:02,283 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 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 00:21:02,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:21:02,499 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:02,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1800524353, now seen corresponding path program 2 times [2020-12-23 00:21:02,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:02,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028277354] [2020-12-23 00:21:02,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:21:02,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028277354] [2020-12-23 00:21:02,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314286360] [2020-12-23 00:21:02,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:02,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:21:02,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:02,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:21:02,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:21:02,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:02,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 00:21:02,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339735068] [2020-12-23 00:21:02,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:21:02,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:02,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:21:02,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:21:02,842 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 17 states. [2020-12-23 00:21:03,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:03,037 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2020-12-23 00:21:03,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:21:03,038 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-12-23 00:21:03,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:03,039 INFO L225 Difference]: With dead ends: 183 [2020-12-23 00:21:03,039 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 00:21:03,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:21:03,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 00:21:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 61. [2020-12-23 00:21:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 00:21:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-12-23 00:21:03,058 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 44 [2020-12-23 00:21:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:03,061 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-12-23 00:21:03,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:21:03,061 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-12-23 00:21:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:21:03,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:03,062 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 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 00:21:03,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:03,276 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash 221719619, now seen corresponding path program 3 times [2020-12-23 00:21:03,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:03,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858648662] [2020-12-23 00:21:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:21:03,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858648662] [2020-12-23 00:21:03,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57727578] [2020-12-23 00:21:03,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:03,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:21:03,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:03,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:21:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 00:21:03,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:03,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2020-12-23 00:21:03,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212884135] [2020-12-23 00:21:03,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:21:03,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:03,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:21:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:21:03,547 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 14 states. [2020-12-23 00:21:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:03,977 INFO L93 Difference]: Finished difference Result 268 states and 299 transitions. [2020-12-23 00:21:03,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:21:03,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-23 00:21:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:03,979 INFO L225 Difference]: With dead ends: 268 [2020-12-23 00:21:03,979 INFO L226 Difference]: Without dead ends: 224 [2020-12-23 00:21:03,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=478, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:21:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-23 00:21:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 76. [2020-12-23 00:21:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:21:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-12-23 00:21:03,994 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 46 [2020-12-23 00:21:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:03,994 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-12-23 00:21:03,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:21:03,994 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-12-23 00:21:03,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:21:03,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:03,995 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:04,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:04,202 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1561519059, now seen corresponding path program 4 times [2020-12-23 00:21:04,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:04,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271021223] [2020-12-23 00:21:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-23 00:21:04,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271021223] [2020-12-23 00:21:04,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988688489] [2020-12-23 00:21:04,324 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 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 00:21:04,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:21:04,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:04,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:21:04,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 00:21:04,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:04,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2020-12-23 00:21:04,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819004320] [2020-12-23 00:21:04,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:21:04,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:04,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:21:04,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:21:04,540 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 18 states. [2020-12-23 00:21:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:05,334 INFO L93 Difference]: Finished difference Result 295 states and 322 transitions. [2020-12-23 00:21:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:21:05,334 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-12-23 00:21:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:05,339 INFO L225 Difference]: With dead ends: 295 [2020-12-23 00:21:05,339 INFO L226 Difference]: Without dead ends: 238 [2020-12-23 00:21:05,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:21:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-23 00:21:05,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 82. [2020-12-23 00:21:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 00:21:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-12-23 00:21:05,354 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 51 [2020-12-23 00:21:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:05,354 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-12-23 00:21:05,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:21:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-12-23 00:21:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:21:05,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:05,355 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 2, 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] [2020-12-23 00:21:05,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:21:05,565 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:05,566 INFO L82 PathProgramCache]: Analyzing trace with hash 658499951, now seen corresponding path program 1 times [2020-12-23 00:21:05,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:05,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506040082] [2020-12-23 00:21:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:21:05,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506040082] [2020-12-23 00:21:05,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502412843] [2020-12-23 00:21:05,739 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 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 00:21:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:05,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:21:05,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:21:06,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:06,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-23 00:21:06,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449144435] [2020-12-23 00:21:06,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:21:06,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:06,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:21:06,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:21:06,008 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 23 states. [2020-12-23 00:21:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:06,276 INFO L93 Difference]: Finished difference Result 256 states and 284 transitions. [2020-12-23 00:21:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:21:06,276 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-12-23 00:21:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:06,278 INFO L225 Difference]: With dead ends: 256 [2020-12-23 00:21:06,278 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 00:21:06,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:21:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 00:21:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 84. [2020-12-23 00:21:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 00:21:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-12-23 00:21:06,291 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 55 [2020-12-23 00:21:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:06,292 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-12-23 00:21:06,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:21:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-12-23 00:21:06,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:21:06,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:06,292 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 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] [2020-12-23 00:21:06,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:21:06,507 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:06,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1472305709, now seen corresponding path program 2 times [2020-12-23 00:21:06,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:06,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457219157] [2020-12-23 00:21:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:21:06,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457219157] [2020-12-23 00:21:06,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27723567] [2020-12-23 00:21:06,702 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 00:21:06,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:21:06,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:06,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:21:06,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:21:07,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:07,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-23 00:21:07,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280889961] [2020-12-23 00:21:07,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 00:21:07,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:07,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 00:21:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:21:07,029 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 25 states. [2020-12-23 00:21:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:07,329 INFO L93 Difference]: Finished difference Result 270 states and 299 transitions. [2020-12-23 00:21:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:21:07,330 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-12-23 00:21:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:07,331 INFO L225 Difference]: With dead ends: 270 [2020-12-23 00:21:07,331 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 00:21:07,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:21:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 00:21:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 86. [2020-12-23 00:21:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 00:21:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-12-23 00:21:07,343 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 57 [2020-12-23 00:21:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:07,343 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-12-23 00:21:07,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 00:21:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-12-23 00:21:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:21:07,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:07,344 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 2, 2, 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] [2020-12-23 00:21:07,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:21:07,559 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:07,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1855591275, now seen corresponding path program 3 times [2020-12-23 00:21:07,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:07,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194691390] [2020-12-23 00:21:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:21:07,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194691390] [2020-12-23 00:21:07,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16449425] [2020-12-23 00:21:07,724 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 00:21:07,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:21:07,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:07,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:21:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-12-23 00:21:07,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:07,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2020-12-23 00:21:07,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873514094] [2020-12-23 00:21:07,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:21:07,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:07,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:21:07,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:21:07,916 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 18 states. [2020-12-23 00:21:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:08,404 INFO L93 Difference]: Finished difference Result 305 states and 342 transitions. [2020-12-23 00:21:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:21:08,405 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-12-23 00:21:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:08,407 INFO L225 Difference]: With dead ends: 305 [2020-12-23 00:21:08,407 INFO L226 Difference]: Without dead ends: 244 [2020-12-23 00:21:08,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=541, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:21:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-23 00:21:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 99. [2020-12-23 00:21:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 00:21:08,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2020-12-23 00:21:08,421 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 59 [2020-12-23 00:21:08,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:08,422 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2020-12-23 00:21:08,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:21:08,422 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2020-12-23 00:21:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:21:08,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:08,423 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:08,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:21:08,638 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:08,639 INFO L82 PathProgramCache]: Analyzing trace with hash -736007971, now seen corresponding path program 4 times [2020-12-23 00:21:08,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:08,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428031891] [2020-12-23 00:21:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 00:21:08,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428031891] [2020-12-23 00:21:08,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983779744] [2020-12-23 00:21:08,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:21:08,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:21:08,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:21:08,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:09,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:21:09,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:21:09,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:21:09,181 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:21:09,182 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2020-12-23 00:21:09,184 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:21:09,191 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:21:09,193 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:21:09,194 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2020-12-23 00:21:19,255 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 23 [2020-12-23 00:21:23,364 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2020-12-23 00:21:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-12-23 00:21:23,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:23,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2020-12-23 00:21:23,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737342761] [2020-12-23 00:21:23,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:21:23,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:23,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:21:23,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=503, Unknown=5, NotChecked=0, Total=650 [2020-12-23 00:21:23,411 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 26 states. [2020-12-23 00:22:17,192 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-23 00:22:51,424 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-23 00:23:03,529 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 00:25:00,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:00,733 INFO L93 Difference]: Finished difference Result 405 states and 444 transitions. [2020-12-23 00:25:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 00:25:00,733 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-12-23 00:25:00,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:00,738 INFO L225 Difference]: With dead ends: 405 [2020-12-23 00:25:00,738 INFO L226 Difference]: Without dead ends: 333 [2020-12-23 00:25:00,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 117.1s TimeCoverageRelationStatistics Valid=1359, Invalid=3990, Unknown=53, NotChecked=0, Total=5402 [2020-12-23 00:25:00,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-12-23 00:25:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 102. [2020-12-23 00:25:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 00:25:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2020-12-23 00:25:00,757 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 67 [2020-12-23 00:25:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:00,758 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2020-12-23 00:25:00,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:25:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2020-12-23 00:25:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:25:00,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:00,768 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:00,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:25:00,983 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:00,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:00,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2026616013, now seen corresponding path program 1 times [2020-12-23 00:25:00,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:00,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980583179] [2020-12-23 00:25:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 00:25:01,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980583179] [2020-12-23 00:25:01,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988915798] [2020-12-23 00:25:01,265 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 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 00:25:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:01,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:25:01,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 00:25:01,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:01,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-23 00:25:01,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359097791] [2020-12-23 00:25:01,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:25:01,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:01,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:25:01,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=556, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:25:01,669 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand 31 states. [2020-12-23 00:25:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:02,132 INFO L93 Difference]: Finished difference Result 336 states and 374 transitions. [2020-12-23 00:25:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:25:02,133 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-12-23 00:25:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:02,134 INFO L225 Difference]: With dead ends: 336 [2020-12-23 00:25:02,135 INFO L226 Difference]: Without dead ends: 263 [2020-12-23 00:25:02,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=556, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:25:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-23 00:25:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 104. [2020-12-23 00:25:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:25:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2020-12-23 00:25:02,149 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 71 [2020-12-23 00:25:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:02,150 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2020-12-23 00:25:02,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:25:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2020-12-23 00:25:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:25:02,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:02,151 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:02,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:02,366 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:02,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1013497841, now seen corresponding path program 2 times [2020-12-23 00:25:02,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:02,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657222218] [2020-12-23 00:25:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 00:25:02,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657222218] [2020-12-23 00:25:02,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343197266] [2020-12-23 00:25:02,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:02,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:02,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:02,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:25:02,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 00:25:03,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:03,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-23 00:25:03,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248185618] [2020-12-23 00:25:03,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 00:25:03,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:03,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 00:25:03,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:25:03,087 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand 33 states. [2020-12-23 00:25:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:03,553 INFO L93 Difference]: Finished difference Result 350 states and 389 transitions. [2020-12-23 00:25:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:25:03,553 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-12-23 00:25:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:03,556 INFO L225 Difference]: With dead ends: 350 [2020-12-23 00:25:03,556 INFO L226 Difference]: Without dead ends: 277 [2020-12-23 00:25:03,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:25:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-23 00:25:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 106. [2020-12-23 00:25:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 00:25:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2020-12-23 00:25:03,571 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 73 [2020-12-23 00:25:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:03,572 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2020-12-23 00:25:03,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 00:25:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2020-12-23 00:25:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:25:03,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:03,573 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:03,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:03,787 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:03,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:03,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1985150255, now seen corresponding path program 3 times [2020-12-23 00:25:03,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:03,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125926303] [2020-12-23 00:25:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 00:25:04,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125926303] [2020-12-23 00:25:04,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784009281] [2020-12-23 00:25:04,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:04,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:25:04,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:04,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:25:04,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2020-12-23 00:25:04,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:04,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2020-12-23 00:25:04,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810604574] [2020-12-23 00:25:04,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:25:04,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:04,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:25:04,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:25:04,292 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand 23 states. [2020-12-23 00:25:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:05,115 INFO L93 Difference]: Finished difference Result 385 states and 432 transitions. [2020-12-23 00:25:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 00:25:05,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 75 [2020-12-23 00:25:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:05,117 INFO L225 Difference]: With dead ends: 385 [2020-12-23 00:25:05,118 INFO L226 Difference]: Without dead ends: 312 [2020-12-23 00:25:05,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:25:05,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-23 00:25:05,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 119. [2020-12-23 00:25:05,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 00:25:05,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2020-12-23 00:25:05,133 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 75 [2020-12-23 00:25:05,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:05,133 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2020-12-23 00:25:05,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:25:05,134 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2020-12-23 00:25:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 00:25:05,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:05,135 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:05,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:25:05,345 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1859565407, now seen corresponding path program 4 times [2020-12-23 00:25:05,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:05,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442784984] [2020-12-23 00:25:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:25:05,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442784984] [2020-12-23 00:25:05,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933030750] [2020-12-23 00:25:05,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:05,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:05,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:05,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:25:05,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-23 00:25:06,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:06,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2020-12-23 00:25:06,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097508771] [2020-12-23 00:25:06,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:25:06,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:06,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:25:06,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:25:06,373 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 34 states. [2020-12-23 00:25:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:09,436 INFO L93 Difference]: Finished difference Result 536 states and 600 transitions. [2020-12-23 00:25:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 00:25:09,437 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 83 [2020-12-23 00:25:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:09,440 INFO L225 Difference]: With dead ends: 536 [2020-12-23 00:25:09,440 INFO L226 Difference]: Without dead ends: 452 [2020-12-23 00:25:09,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2358, Invalid=6572, Unknown=0, NotChecked=0, Total=8930 [2020-12-23 00:25:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-12-23 00:25:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 162. [2020-12-23 00:25:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 00:25:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 180 transitions. [2020-12-23 00:25:09,470 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 180 transitions. Word has length 83 [2020-12-23 00:25:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:09,470 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 180 transitions. [2020-12-23 00:25:09,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:25:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 180 transitions. [2020-12-23 00:25:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:25:09,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:09,471 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:09,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:09,685 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:09,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1455479749, now seen corresponding path program 1 times [2020-12-23 00:25:09,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:09,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588231778] [2020-12-23 00:25:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-23 00:25:10,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588231778] [2020-12-23 00:25:10,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392419516] [2020-12-23 00:25:10,022 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 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 00:25:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:10,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:25:10,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-23 00:25:10,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:10,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2020-12-23 00:25:10,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507596042] [2020-12-23 00:25:10,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 00:25:10,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:10,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 00:25:10,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=894, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:25:10,600 INFO L87 Difference]: Start difference. First operand 162 states and 180 transitions. Second operand 39 states. [2020-12-23 00:25:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:11,268 INFO L93 Difference]: Finished difference Result 492 states and 543 transitions. [2020-12-23 00:25:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:25:11,269 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 89 [2020-12-23 00:25:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:11,272 INFO L225 Difference]: With dead ends: 492 [2020-12-23 00:25:11,273 INFO L226 Difference]: Without dead ends: 367 [2020-12-23 00:25:11,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=588, Invalid=894, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:25:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-23 00:25:11,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 164. [2020-12-23 00:25:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 00:25:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2020-12-23 00:25:11,301 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 89 [2020-12-23 00:25:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:11,302 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2020-12-23 00:25:11,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 00:25:11,302 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2020-12-23 00:25:11,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:25:11,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:11,303 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:11,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:25:11,517 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:11,518 INFO L82 PathProgramCache]: Analyzing trace with hash -768400007, now seen corresponding path program 2 times [2020-12-23 00:25:11,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:11,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924430070] [2020-12-23 00:25:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-23 00:25:11,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924430070] [2020-12-23 00:25:11,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533953467] [2020-12-23 00:25:11,867 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 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 00:25:11,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:11,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:25:11,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-23 00:25:12,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:12,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-23 00:25:12,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798678883] [2020-12-23 00:25:12,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:25:12,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:12,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:25:12,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=991, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:25:12,475 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand 41 states. [2020-12-23 00:25:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:13,144 INFO L93 Difference]: Finished difference Result 506 states and 558 transitions. [2020-12-23 00:25:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:25:13,144 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2020-12-23 00:25:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:13,147 INFO L225 Difference]: With dead ends: 506 [2020-12-23 00:25:13,147 INFO L226 Difference]: Without dead ends: 381 [2020-12-23 00:25:13,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=649, Invalid=991, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:25:13,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-23 00:25:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 166. [2020-12-23 00:25:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 00:25:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 184 transitions. [2020-12-23 00:25:13,174 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 184 transitions. Word has length 91 [2020-12-23 00:25:13,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:13,174 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 184 transitions. [2020-12-23 00:25:13,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:25:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 184 transitions. [2020-12-23 00:25:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 00:25:13,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:13,176 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:13,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:25:13,387 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:13,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1909731529, now seen corresponding path program 3 times [2020-12-23 00:25:13,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:13,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248643561] [2020-12-23 00:25:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-23 00:25:13,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248643561] [2020-12-23 00:25:13,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313917661] [2020-12-23 00:25:13,754 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 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 00:25:13,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:25:13,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:13,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:25:13,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2020-12-23 00:25:14,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:14,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2020-12-23 00:25:14,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970034904] [2020-12-23 00:25:14,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:25:14,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:14,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:25:14,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:25:14,104 INFO L87 Difference]: Start difference. First operand 166 states and 184 transitions. Second operand 28 states. [2020-12-23 00:25:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:15,251 INFO L93 Difference]: Finished difference Result 541 states and 601 transitions. [2020-12-23 00:25:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:25:15,251 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 93 [2020-12-23 00:25:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:15,253 INFO L225 Difference]: With dead ends: 541 [2020-12-23 00:25:15,253 INFO L226 Difference]: Without dead ends: 416 [2020-12-23 00:25:15,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=696, Invalid=1466, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:25:15,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-12-23 00:25:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 179. [2020-12-23 00:25:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 00:25:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 200 transitions. [2020-12-23 00:25:15,296 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 200 transitions. Word has length 93 [2020-12-23 00:25:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:15,296 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 200 transitions. [2020-12-23 00:25:15,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:25:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 200 transitions. [2020-12-23 00:25:15,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:25:15,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:15,297 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:15,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:25:15,512 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:15,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1243642921, now seen corresponding path program 4 times [2020-12-23 00:25:15,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:15,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161789006] [2020-12-23 00:25:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-23 00:25:15,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161789006] [2020-12-23 00:25:15,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226354362] [2020-12-23 00:25:15,952 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 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 00:25:16,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:16,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:16,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:25:16,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-23 00:25:16,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:16,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2020-12-23 00:25:16,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332132491] [2020-12-23 00:25:16,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:25:16,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:16,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:25:16,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=1200, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:25:16,681 INFO L87 Difference]: Start difference. First operand 179 states and 200 transitions. Second operand 45 states. [2020-12-23 00:25:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:17,461 INFO L93 Difference]: Finished difference Result 556 states and 616 transitions. [2020-12-23 00:25:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:25:17,462 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 101 [2020-12-23 00:25:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:17,464 INFO L225 Difference]: With dead ends: 556 [2020-12-23 00:25:17,465 INFO L226 Difference]: Without dead ends: 420 [2020-12-23 00:25:17,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=1200, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:25:17,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-12-23 00:25:17,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 181. [2020-12-23 00:25:17,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 00:25:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 202 transitions. [2020-12-23 00:25:17,496 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 202 transitions. Word has length 101 [2020-12-23 00:25:17,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:17,496 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 202 transitions. [2020-12-23 00:25:17,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:25:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 202 transitions. [2020-12-23 00:25:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 00:25:17,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:17,498 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:17,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:25:17,712 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:17,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:17,712 INFO L82 PathProgramCache]: Analyzing trace with hash -338259865, now seen corresponding path program 5 times [2020-12-23 00:25:17,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:17,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624197719] [2020-12-23 00:25:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-23 00:25:18,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624197719] [2020-12-23 00:25:18,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57425348] [2020-12-23 00:25:18,170 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 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