/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/verifythis/prefixsum_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:16:45,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:16:45,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:16:45,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:16:45,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:16:45,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:16:45,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:16:46,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:16:46,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:16:46,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:16:46,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:16:46,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:16:46,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:16:46,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:16:46,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:16:46,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:16:46,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:16:46,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:16:46,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:16:46,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:16:46,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:16:46,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:16:46,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:16:46,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:16:46,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:16:46,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:16:46,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:16:46,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:16:46,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:16:46,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:16:46,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:16:46,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:16:46,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:16:46,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:16:46,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:16:46,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:16:46,085 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 07:16:46,115 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:16:46,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:16:46,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:16:46,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:16:46,118 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:16:46,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:16:46,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:16:46,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:16:46,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:16:46,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:16:46,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:16:46,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:16:46,120 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:16:46,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:16:46,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:16:46,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:16:46,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:16:46,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:16:46,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:16:46,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:16:46,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:16:46,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:16:46,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:16:46,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:16:46,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:16:46,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:16:46,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:16:46,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:16:46,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:16:46,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:16:46,576 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:16:46,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2020-12-23 07:16:46,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d34f1c38d/3c5bb0f35896489bb09472c3cb60aeb5/FLAG98ea54866 [2020-12-23 07:16:47,289 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:16:47,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2020-12-23 07:16:47,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d34f1c38d/3c5bb0f35896489bb09472c3cb60aeb5/FLAG98ea54866 [2020-12-23 07:16:47,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d34f1c38d/3c5bb0f35896489bb09472c3cb60aeb5 [2020-12-23 07:16:47,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:16:47,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:16:47,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:16:47,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:16:47,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:16:47,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:16:47" (1/1) ... [2020-12-23 07:16:47,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@101ab7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47, skipping insertion in model container [2020-12-23 07:16:47,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:16:47" (1/1) ... [2020-12-23 07:16:47,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:16:47,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:16:47,861 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/verifythis/prefixsum_iter.c[526,539] left hand side expression in assignment: lhs: VariableLHS[~space~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~right~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~left~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,IdentifierExpression[~n,],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~space,] left hand side expression in assignment: lhs: VariableLHS[~space,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~right~1,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~left~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~right~1,] 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[~a0~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a0~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] [2020-12-23 07:16:47,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:16:47,945 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:16:47,960 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/verifythis/prefixsum_iter.c[526,539] left hand side expression in assignment: lhs: VariableLHS[~space~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~right~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~left~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,IdentifierExpression[~n,],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~space,] left hand side expression in assignment: lhs: VariableLHS[~space,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~right~1,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~left~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~right~1,] 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[~a0~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a0~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] [2020-12-23 07:16:47,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:16:47,998 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:16:47,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47 WrapperNode [2020-12-23 07:16:47,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:16:48,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:16:48,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:16:48,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:16:48,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47" (1/1) ... [2020-12-23 07:16:48,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47" (1/1) ... [2020-12-23 07:16:48,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:16:48,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:16:48,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:16:48,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:16:48,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47" (1/1) ... [2020-12-23 07:16:48,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47" (1/1) ... [2020-12-23 07:16:48,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47" (1/1) ... [2020-12-23 07:16:48,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47" (1/1) ... [2020-12-23 07:16:48,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47" (1/1) ... [2020-12-23 07:16:48,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47" (1/1) ... [2020-12-23 07:16:48,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47" (1/1) ... [2020-12-23 07:16:48,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:16:48,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:16:48,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:16:48,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:16:48,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47" (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 07:16:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:16:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:16:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 07:16:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 07:16:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:16:48,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:16:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 07:16:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 07:16:48,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:16:48,801 INFO L299 CfgBuilder]: Removed 29 assume(true) statements. [2020-12-23 07:16:48,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:16:48 BoogieIcfgContainer [2020-12-23 07:16:48,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:16:48,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:16:48,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:16:48,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:16:48,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:16:47" (1/3) ... [2020-12-23 07:16:48,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@606ac66c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:16:48, skipping insertion in model container [2020-12-23 07:16:48,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:16:47" (2/3) ... [2020-12-23 07:16:48,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@606ac66c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:16:48, skipping insertion in model container [2020-12-23 07:16:48,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:16:48" (3/3) ... [2020-12-23 07:16:48,831 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2020-12-23 07:16:48,853 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:16:48,858 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:16:48,881 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:16:48,911 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:16:48,911 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:16:48,911 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:16:48,911 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:16:48,912 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:16:48,912 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:16:48,912 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:16:48,912 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:16:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-23 07:16:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:16:48,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:48,938 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 07:16:48,938 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:48,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:48,945 INFO L82 PathProgramCache]: Analyzing trace with hash -846101861, now seen corresponding path program 1 times [2020-12-23 07:16:48,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:48,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850482130] [2020-12-23 07:16:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:49,150 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 07:16:49,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850482130] [2020-12-23 07:16:49,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:16:49,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:16:49,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850585297] [2020-12-23 07:16:49,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:16:49,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:49,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:16:49,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:16:49,179 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-23 07:16:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:49,203 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2020-12-23 07:16:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:16:49,204 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-12-23 07:16:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:49,214 INFO L225 Difference]: With dead ends: 63 [2020-12-23 07:16:49,214 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 07:16:49,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:16:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 07:16:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 07:16:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 07:16:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-23 07:16:49,259 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-12-23 07:16:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:49,260 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-23 07:16:49,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:16:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-23 07:16:49,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:16:49,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:49,262 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 07:16:49,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:16:49,262 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:49,264 INFO L82 PathProgramCache]: Analyzing trace with hash 748804443, now seen corresponding path program 1 times [2020-12-23 07:16:49,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:49,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817542843] [2020-12-23 07:16:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:49,535 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 07:16:49,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817542843] [2020-12-23 07:16:49,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:16:49,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:16:49,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903443678] [2020-12-23 07:16:49,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:16:49,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:49,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:16:49,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:16:49,545 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2020-12-23 07:16:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:49,769 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2020-12-23 07:16:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:16:49,770 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 07:16:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:49,772 INFO L225 Difference]: With dead ends: 86 [2020-12-23 07:16:49,772 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 07:16:49,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:16:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 07:16:49,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 30. [2020-12-23 07:16:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:16:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-23 07:16:49,782 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 21 [2020-12-23 07:16:49,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:49,782 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-23 07:16:49,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:16:49,783 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-23 07:16:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:16:49,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:49,784 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] [2020-12-23 07:16:49,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:16:49,784 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:49,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:49,785 INFO L82 PathProgramCache]: Analyzing trace with hash 400112637, now seen corresponding path program 1 times [2020-12-23 07:16:49,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:49,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719036155] [2020-12-23 07:16:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:49,990 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 07:16:49,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719036155] [2020-12-23 07:16:49,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:16:49,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 07:16:49,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534531373] [2020-12-23 07:16:49,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:16:49,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:49,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:16:49,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:16:49,994 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 7 states. [2020-12-23 07:16:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:50,190 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-23 07:16:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:16:50,190 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-23 07:16:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:50,193 INFO L225 Difference]: With dead ends: 35 [2020-12-23 07:16:50,196 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:16:50,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:16:50,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:16:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-23 07:16:50,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 07:16:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-12-23 07:16:50,219 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2020-12-23 07:16:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:50,220 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-12-23 07:16:50,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:16:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-12-23 07:16:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:16:50,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:50,222 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:50,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:16:50,222 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash -670891724, now seen corresponding path program 1 times [2020-12-23 07:16:50,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:50,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81771170] [2020-12-23 07:16:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:50,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81771170] [2020-12-23 07:16:50,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550670526] [2020-12-23 07:16:50,416 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 07:16:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:50,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:16:50,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:50,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:50,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-12-23 07:16:50,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288671630] [2020-12-23 07:16:50,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:16:50,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:50,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:16:50,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:16:50,627 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 11 states. [2020-12-23 07:16:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:50,827 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2020-12-23 07:16:50,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:16:50,828 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-12-23 07:16:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:50,829 INFO L225 Difference]: With dead ends: 102 [2020-12-23 07:16:50,829 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 07:16:50,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:16:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 07:16:50,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 34. [2020-12-23 07:16:50,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 07:16:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-12-23 07:16:50,837 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 27 [2020-12-23 07:16:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:50,838 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-12-23 07:16:50,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:16:50,838 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-12-23 07:16:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:16:50,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:50,839 INFO L422 BasicCegarLoop]: trace histogram [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 07:16:51,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:51,055 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:51,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:51,057 INFO L82 PathProgramCache]: Analyzing trace with hash -631610794, now seen corresponding path program 2 times [2020-12-23 07:16:51,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:51,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362494693] [2020-12-23 07:16:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:16:51,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362494693] [2020-12-23 07:16:51,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934254161] [2020-12-23 07:16:51,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:51,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:16:51,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:51,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:16:51,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:16:51,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:16:51,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-12-23 07:16:51,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407832786] [2020-12-23 07:16:51,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:16:51,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:51,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:16:51,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:16:51,354 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-12-23 07:16:51,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:51,460 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-12-23 07:16:51,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:16:51,461 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-23 07:16:51,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:51,462 INFO L225 Difference]: With dead ends: 54 [2020-12-23 07:16:51,462 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:16:51,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:16:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:16:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-12-23 07:16:51,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:16:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-12-23 07:16:51,470 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 29 [2020-12-23 07:16:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:51,470 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-12-23 07:16:51,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:16:51,470 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-12-23 07:16:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:16:51,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:51,472 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-12-23 07:16:51,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:51,685 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:51,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1948085563, now seen corresponding path program 1 times [2020-12-23 07:16:51,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:51,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198926565] [2020-12-23 07:16:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:16:51,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198926565] [2020-12-23 07:16:51,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:16:51,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:16:51,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130198295] [2020-12-23 07:16:51,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:16:51,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:51,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:16:51,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:16:51,731 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2020-12-23 07:16:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:51,743 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-12-23 07:16:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:16:51,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-12-23 07:16:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:51,744 INFO L225 Difference]: With dead ends: 53 [2020-12-23 07:16:51,745 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 07:16:51,745 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 07:16:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 07:16:51,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 07:16:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 07:16:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-12-23 07:16:51,751 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 32 [2020-12-23 07:16:51,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:51,751 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-12-23 07:16:51,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:16:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-12-23 07:16:51,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:16:51,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:51,753 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-12-23 07:16:51,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 07:16:51,753 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:51,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:51,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1176909381, now seen corresponding path program 1 times [2020-12-23 07:16:51,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:51,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921888564] [2020-12-23 07:16:51,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:16:51,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921888564] [2020-12-23 07:16:51,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209828340] [2020-12-23 07:16:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:51,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:16:51,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:52,059 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:52,069 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:16:52,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:16:52,080 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 07:16:52,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:16:52,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2020-12-23 07:16:52,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781271208] [2020-12-23 07:16:52,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:16:52,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:16:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:16:52,111 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-12-23 07:16:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:52,175 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-12-23 07:16:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:16:52,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-12-23 07:16:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:52,176 INFO L225 Difference]: With dead ends: 49 [2020-12-23 07:16:52,176 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 07:16:52,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:16:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 07:16:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-12-23 07:16:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:16:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-12-23 07:16:52,183 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 33 [2020-12-23 07:16:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:52,183 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-12-23 07:16:52,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:16:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-12-23 07:16:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:16:52,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:52,185 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:52,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:52,401 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:52,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1394897861, now seen corresponding path program 1 times [2020-12-23 07:16:52,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:52,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806993267] [2020-12-23 07:16:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:16:52,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806993267] [2020-12-23 07:16:52,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786023909] [2020-12-23 07:16:52,530 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 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 07:16:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:52,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:16:52,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:16:52,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:52,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-12-23 07:16:52,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660623245] [2020-12-23 07:16:52,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:16:52,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:52,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:16:52,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:16:52,745 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 12 states. [2020-12-23 07:16:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:53,129 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2020-12-23 07:16:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:16:53,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-12-23 07:16:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:53,131 INFO L225 Difference]: With dead ends: 85 [2020-12-23 07:16:53,131 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 07:16:53,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:16:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 07:16:53,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 39. [2020-12-23 07:16:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:16:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-12-23 07:16:53,139 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 36 [2020-12-23 07:16:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:53,140 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-12-23 07:16:53,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:16:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-12-23 07:16:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:16:53,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:53,141 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:53,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:53,357 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:53,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1037341174, now seen corresponding path program 1 times [2020-12-23 07:16:53,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:53,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810510845] [2020-12-23 07:16:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:53,545 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 07:16:53,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810510845] [2020-12-23 07:16:53,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360987283] [2020-12-23 07:16:53,546 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 07:16:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 98 conjunts are in the unsatisfiable core [2020-12-23 07:16:53,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:53,746 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 07:16:53,747 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:16:53,758 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:16:53,763 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2020-12-23 07:16:53,764 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 07:16:53,772 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:16:53,773 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:16:53,773 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:20, output treesize:18 [2020-12-23 07:16:53,813 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:16:53,813 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-12-23 07:16:53,816 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:53,819 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:16:53,830 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:16:53,836 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2020-12-23 07:16:53,838 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 07:16:53,848 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:16:53,850 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:16:53,850 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2020-12-23 07:16:53,917 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2020-12-23 07:16:53,920 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:16:53,934 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:16:53,935 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:16:53,935 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:41 [2020-12-23 07:16:54,004 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2020-12-23 07:16:54,020 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:16:54,045 INFO L625 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2020-12-23 07:16:54,047 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:16:54,047 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:40 [2020-12-23 07:16:54,293 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2020-12-23 07:16:54,295 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:16:54,316 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:16:54,322 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 07:16:54,323 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:82, output treesize:72 [2020-12-23 07:16:54,882 WARN L197 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 07:16:55,547 WARN L197 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-23 07:16:56,132 WARN L197 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-23 07:16:56,166 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2020-12-23 07:16:56,168 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:16:56,192 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:16:56,200 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 07:16:56,200 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:92, output treesize:84 [2020-12-23 07:16:56,813 WARN L197 SmtUtils]: Spent 558.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 07:16:57,486 WARN L197 SmtUtils]: Spent 565.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-23 07:16:57,525 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 76 [2020-12-23 07:16:57,527 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:16:57,554 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:16:57,572 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 07:16:57,573 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:103, output treesize:155 [2020-12-23 07:16:59,516 WARN L197 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 07:17:00,334 WARN L197 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-23 07:17:01,081 WARN L197 SmtUtils]: Spent 623.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 07:17:01,790 WARN L197 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 07:17:01,816 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:01,820 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:01,821 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:17:01,824 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:17:01,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:01,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:17:01,832 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:01,834 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:01,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:17:01,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:17:01,845 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 07:17:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:01,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:01,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23] total 30 [2020-12-23 07:17:01,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768480948] [2020-12-23 07:17:01,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:17:01,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:01,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:17:01,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=771, Unknown=2, NotChecked=0, Total=870 [2020-12-23 07:17:01,926 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 30 states. [2020-12-23 07:17:10,397 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-12-23 07:17:13,084 WARN L197 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2020-12-23 07:17:14,767 WARN L197 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-12-23 07:17:15,571 WARN L197 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-12-23 07:17:17,892 WARN L197 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-12-23 07:17:19,532 WARN L197 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-12-23 07:17:21,169 WARN L197 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-12-23 07:17:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:21,988 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2020-12-23 07:17:21,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 07:17:21,989 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2020-12-23 07:17:21,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:21,994 INFO L225 Difference]: With dead ends: 131 [2020-12-23 07:17:21,994 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 07:17:21,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=549, Invalid=3871, Unknown=2, NotChecked=0, Total=4422 [2020-12-23 07:17:21,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 07:17:22,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 71. [2020-12-23 07:17:22,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 07:17:22,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2020-12-23 07:17:22,016 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 37 [2020-12-23 07:17:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:22,016 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2020-12-23 07:17:22,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:17:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2020-12-23 07:17:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:17:22,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:22,017 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:22,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:22,218 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:22,220 INFO L82 PathProgramCache]: Analyzing trace with hash -309956456, now seen corresponding path program 2 times [2020-12-23 07:17:22,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:22,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238036818] [2020-12-23 07:17:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:17:22,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238036818] [2020-12-23 07:17:22,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585733540] [2020-12-23 07:17:22,396 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 07:17:22,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:17:22,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:22,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:17:22,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:17:22,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:22,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2020-12-23 07:17:22,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773943473] [2020-12-23 07:17:22,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:17:22,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:22,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:17:22,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:17:22,616 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand 14 states. [2020-12-23 07:17:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:23,193 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2020-12-23 07:17:23,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:17:23,199 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-12-23 07:17:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:23,200 INFO L225 Difference]: With dead ends: 146 [2020-12-23 07:17:23,201 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 07:17:23,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:17:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 07:17:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 72. [2020-12-23 07:17:23,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 07:17:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-12-23 07:17:23,243 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 39 [2020-12-23 07:17:23,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:23,243 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-12-23 07:17:23,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:17:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-12-23 07:17:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:17:23,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:23,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:23,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:23,455 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:23,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1189584364, now seen corresponding path program 1 times [2020-12-23 07:17:23,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:23,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266503478] [2020-12-23 07:17:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:17:23,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266503478] [2020-12-23 07:17:23,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832407455] [2020-12-23 07:17:23,558 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 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 07:17:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:23,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:17:23,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 07:17:23,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:23,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2020-12-23 07:17:23,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943399464] [2020-12-23 07:17:23,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:17:23,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:23,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:17:23,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:17:23,773 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 14 states. [2020-12-23 07:17:24,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:24,140 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-12-23 07:17:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:17:24,140 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-12-23 07:17:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:24,141 INFO L225 Difference]: With dead ends: 119 [2020-12-23 07:17:24,142 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 07:17:24,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:17:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 07:17:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2020-12-23 07:17:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 07:17:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2020-12-23 07:17:24,162 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 39 [2020-12-23 07:17:24,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:24,163 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2020-12-23 07:17:24,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:17:24,163 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2020-12-23 07:17:24,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:17:24,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:24,164 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:24,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:24,378 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:24,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2012645282, now seen corresponding path program 2 times [2020-12-23 07:17:24,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:24,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838736090] [2020-12-23 07:17:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:17:24,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838736090] [2020-12-23 07:17:24,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411341774] [2020-12-23 07:17:24,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:24,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:17:24,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:24,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:17:24,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:24,879 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:17:24,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:17:24,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:17:24,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:17:24,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:17:24,906 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:24,909 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 07:17:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:17:25,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:25,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2020-12-23 07:17:25,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110866465] [2020-12-23 07:17:25,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:17:25,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:25,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:17:25,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:17:25,171 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand 22 states. [2020-12-23 07:17:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:26,602 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2020-12-23 07:17:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:17:26,603 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2020-12-23 07:17:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:26,605 INFO L225 Difference]: With dead ends: 147 [2020-12-23 07:17:26,605 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 07:17:26,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:17:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 07:17:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 84. [2020-12-23 07:17:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 07:17:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-12-23 07:17:26,637 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 41 [2020-12-23 07:17:26,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:26,637 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-12-23 07:17:26,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:17:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-12-23 07:17:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:17:26,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:26,640 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:26,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:17:26,854 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:26,856 INFO L82 PathProgramCache]: Analyzing trace with hash -325294395, now seen corresponding path program 3 times [2020-12-23 07:17:26,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:26,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825421625] [2020-12-23 07:17:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:17:27,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825421625] [2020-12-23 07:17:27,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441689005] [2020-12-23 07:17:27,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:27,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:17:27,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:27,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:17:27,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:17:27,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:27,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2020-12-23 07:17:27,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095505194] [2020-12-23 07:17:27,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:17:27,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:27,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:17:27,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:17:27,268 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 15 states. [2020-12-23 07:17:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:27,813 INFO L93 Difference]: Finished difference Result 165 states and 193 transitions. [2020-12-23 07:17:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:17:27,814 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-12-23 07:17:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:27,815 INFO L225 Difference]: With dead ends: 165 [2020-12-23 07:17:27,815 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 07:17:27,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:17:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 07:17:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 94. [2020-12-23 07:17:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 07:17:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2020-12-23 07:17:27,837 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 42 [2020-12-23 07:17:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:27,837 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2020-12-23 07:17:27,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:17:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2020-12-23 07:17:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:17:27,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:27,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:28,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:28,054 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1664573759, now seen corresponding path program 4 times [2020-12-23 07:17:28,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:28,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121197832] [2020-12-23 07:17:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 07:17:28,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121197832] [2020-12-23 07:17:28,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868303929] [2020-12-23 07:17:28,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:28,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:17:28,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:28,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:17:28,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:17:28,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:28,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-12-23 07:17:28,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821609773] [2020-12-23 07:17:28,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:17:28,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:28,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:17:28,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:17:28,459 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 16 states. [2020-12-23 07:17:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:29,408 INFO L93 Difference]: Finished difference Result 164 states and 200 transitions. [2020-12-23 07:17:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:17:29,409 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-12-23 07:17:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:29,410 INFO L225 Difference]: With dead ends: 164 [2020-12-23 07:17:29,410 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 07:17:29,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:17:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 07:17:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-12-23 07:17:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 07:17:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-12-23 07:17:29,430 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 42 [2020-12-23 07:17:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:29,430 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-12-23 07:17:29,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:17:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-12-23 07:17:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:17:29,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:29,431 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:29,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:29,645 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:29,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:29,646 INFO L82 PathProgramCache]: Analyzing trace with hash 714914557, now seen corresponding path program 5 times [2020-12-23 07:17:29,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:29,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40605641] [2020-12-23 07:17:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:17:29,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40605641] [2020-12-23 07:17:29,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476339524] [2020-12-23 07:17:29,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:29,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 07:17:29,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:29,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:17:29,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:17:30,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:30,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-23 07:17:30,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912474406] [2020-12-23 07:17:30,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:17:30,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:30,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:17:30,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:17:30,044 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 14 states. [2020-12-23 07:17:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:30,445 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2020-12-23 07:17:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:17:30,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-12-23 07:17:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:30,446 INFO L225 Difference]: With dead ends: 121 [2020-12-23 07:17:30,446 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 07:17:30,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:17:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 07:17:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 48. [2020-12-23 07:17:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 07:17:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-12-23 07:17:30,459 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 42 [2020-12-23 07:17:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:30,459 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-12-23 07:17:30,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:17:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-12-23 07:17:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 07:17:30,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:30,460 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:30,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:17:30,664 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:30,665 INFO L82 PathProgramCache]: Analyzing trace with hash 216186809, now seen corresponding path program 3 times [2020-12-23 07:17:30,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:30,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391869551] [2020-12-23 07:17:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:17:30,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391869551] [2020-12-23 07:17:30,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904195720] [2020-12-23 07:17:30,739 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 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 07:17:30,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:17:30,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:30,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:17:30,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 07:17:31,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:17:31,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2020-12-23 07:17:31,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797150346] [2020-12-23 07:17:31,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:17:31,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:31,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:17:31,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:17:31,186 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 9 states. [2020-12-23 07:17:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:31,663 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2020-12-23 07:17:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:17:31,664 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-12-23 07:17:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:31,664 INFO L225 Difference]: With dead ends: 92 [2020-12-23 07:17:31,665 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 07:17:31,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:17:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 07:17:31,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-23 07:17:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 07:17:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-12-23 07:17:31,683 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 44 [2020-12-23 07:17:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:31,683 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-12-23 07:17:31,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:17:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-12-23 07:17:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 07:17:31,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:31,684 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:31,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:17:31,899 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:31,900 INFO L82 PathProgramCache]: Analyzing trace with hash 742749345, now seen corresponding path program 6 times [2020-12-23 07:17:31,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:31,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210256241] [2020-12-23 07:17:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 07:17:31,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210256241] [2020-12-23 07:17:31,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941786054] [2020-12-23 07:17:31,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:17:32,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:17:32,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:32,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:17:32,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:32,197 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:32,202 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:17:32,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:17:32,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 07:17:32,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:32,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2020-12-23 07:17:32,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585209684] [2020-12-23 07:17:32,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:17:32,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:32,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:17:32,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:17:32,244 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 11 states. [2020-12-23 07:17:32,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:32,414 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-12-23 07:17:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:17:32,415 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-12-23 07:17:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:32,416 INFO L225 Difference]: With dead ends: 68 [2020-12-23 07:17:32,416 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:17:32,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:17:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:17:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-12-23 07:17:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 07:17:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-23 07:17:32,432 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 45 [2020-12-23 07:17:32,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:32,433 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-23 07:17:32,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:17:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-23 07:17:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 07:17:32,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:32,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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, 1, 1, 1] [2020-12-23 07:17:32,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:17:32,647 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:32,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1592678165, now seen corresponding path program 7 times [2020-12-23 07:17:32,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:32,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645061676] [2020-12-23 07:17:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-23 07:17:32,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645061676] [2020-12-23 07:17:32,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943607337] [2020-12-23 07:17:32,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:17:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:32,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 125 conjunts are in the unsatisfiable core [2020-12-23 07:17:32,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:33,000 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 07:17:33,001 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,010 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:17:33,015 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2020-12-23 07:17:33,016 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,024 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:17:33,025 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,026 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:20, output treesize:18 [2020-12-23 07:17:33,065 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:17:33,069 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-12-23 07:17:33,071 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:33,073 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,083 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:17:33,089 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2020-12-23 07:17:33,090 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,100 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:17:33,100 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,101 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2020-12-23 07:17:33,171 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2020-12-23 07:17:33,172 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,185 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:17:33,186 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,186 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:40 [2020-12-23 07:17:33,253 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2020-12-23 07:17:33,256 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,269 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:17:33,270 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,271 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:40 [2020-12-23 07:17:33,347 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2020-12-23 07:17:33,348 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,375 INFO L625 ElimStorePlain]: treesize reduction 3, result has 93.2 percent of original size [2020-12-23 07:17:33,377 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 07:17:33,377 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:41 [2020-12-23 07:17:33,583 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 62 [2020-12-23 07:17:33,584 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,611 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:17:33,614 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 07:17:33,614 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:99, output treesize:88 [2020-12-23 07:17:33,719 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 83 [2020-12-23 07:17:33,721 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,756 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:17:33,757 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 07:17:33,758 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:111, output treesize:153 [2020-12-23 07:17:33,976 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2020-12-23 07:17:33,977 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:33,994 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:17:33,996 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 07:17:33,996 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:69 [2020-12-23 07:17:34,238 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2020-12-23 07:17:34,239 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:34,262 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:17:34,264 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 07:17:34,264 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:82, output treesize:74 [2020-12-23 07:17:34,697 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 78 [2020-12-23 07:17:34,699 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:17:34,731 INFO L625 ElimStorePlain]: treesize reduction 3, result has 98.2 percent of original size [2020-12-23 07:17:34,734 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 07:17:34,734 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:163 [2020-12-23 07:17:35,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:35,284 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:35,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:17:35,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:17:35,289 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:35,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:17:35,291 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 07:17:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:17:35,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:35,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 29] total 36 [2020-12-23 07:17:35,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869250135] [2020-12-23 07:17:35,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:17:35,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:35,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:17:35,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:17:35,388 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 36 states. [2020-12-23 07:17:38,225 WARN L197 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-23 07:17:38,610 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-12-23 07:17:38,819 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-12-23 07:17:39,764 WARN L197 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-12-23 07:17:40,030 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-12-23 07:17:40,241 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-12-23 07:17:41,206 WARN L197 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-23 07:17:42,156 WARN L197 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-23 07:17:42,512 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-12-23 07:17:42,853 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-12-23 07:17:43,899 WARN L197 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-12-23 07:17:44,899 WARN L197 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2020-12-23 07:17:48,169 WARN L197 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-12-23 07:17:50,463 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 108 DAG size of output: 97 [2020-12-23 07:17:51,523 WARN L197 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 100 [2020-12-23 07:17:52,998 WARN L197 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-12-23 07:17:54,518 WARN L197 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2020-12-23 07:17:55,487 WARN L197 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-12-23 07:17:55,717 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2020-12-23 07:17:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:55,957 INFO L93 Difference]: Finished difference Result 144 states and 175 transitions. [2020-12-23 07:17:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:17:55,957 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 48 [2020-12-23 07:17:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:55,958 INFO L225 Difference]: With dead ends: 144 [2020-12-23 07:17:55,958 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 07:17:55,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=741, Invalid=4089, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:17:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 07:17:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 60. [2020-12-23 07:17:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 07:17:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-12-23 07:17:55,979 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 48 [2020-12-23 07:17:55,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:55,980 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-12-23 07:17:55,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:17:55,980 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-12-23 07:17:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 07:17:55,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:55,981 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:56,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:56,194 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:56,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:56,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2083044420, now seen corresponding path program 8 times [2020-12-23 07:17:56,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:56,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469102468] [2020-12-23 07:17:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-23 07:17:56,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469102468] [2020-12-23 07:17:56,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161921575] [2020-12-23 07:17:56,346 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 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 07:17:56,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:17:56,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:56,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:17:56,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 07:17:56,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:56,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2020-12-23 07:17:56,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777410614] [2020-12-23 07:17:56,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:17:56,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:56,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:17:56,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:17:56,610 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 16 states. [2020-12-23 07:17:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:56,974 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-12-23 07:17:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:17:56,975 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-12-23 07:17:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:56,976 INFO L225 Difference]: With dead ends: 79 [2020-12-23 07:17:56,976 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 07:17:56,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:17:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 07:17:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-12-23 07:17:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 07:17:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-12-23 07:17:56,996 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 54 [2020-12-23 07:17:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:56,997 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-12-23 07:17:56,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:17:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-12-23 07:17:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 07:17:56,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:56,998 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:57,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:57,213 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:57,213 INFO L82 PathProgramCache]: Analyzing trace with hash -651561883, now seen corresponding path program 9 times [2020-12-23 07:17:57,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:57,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942217029] [2020-12-23 07:17:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 07:17:57,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942217029] [2020-12-23 07:17:57,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441403093] [2020-12-23 07:17:57,405 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 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 07:17:57,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:17:57,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:57,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:17:57,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 07:17:58,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:58,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2020-12-23 07:17:58,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870263133] [2020-12-23 07:17:58,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 07:17:58,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:58,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 07:17:58,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:17:58,461 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 26 states. [2020-12-23 07:17:58,956 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-12-23 07:18:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:00,836 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2020-12-23 07:18:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:18:00,837 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2020-12-23 07:18:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:00,838 INFO L225 Difference]: With dead ends: 149 [2020-12-23 07:18:00,838 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 07:18:00,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=303, Invalid=1953, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:18:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 07:18:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-12-23 07:18:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 07:18:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-12-23 07:18:00,867 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 55 [2020-12-23 07:18:00,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:00,867 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-12-23 07:18:00,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 07:18:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-12-23 07:18:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 07:18:00,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:00,868 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:01,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:01,072 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:18:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:01,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1276165686, now seen corresponding path program 10 times [2020-12-23 07:18:01,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:01,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925922621] [2020-12-23 07:18:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:03,510 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2020-12-23 07:18:03,703 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-23 07:18:04,269 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-12-23 07:18:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:18:04,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925922621] [2020-12-23 07:18:04,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915861552] [2020-12-23 07:18:04,989 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 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 07:18:05,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:18:05,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:18:05,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 142 conjunts are in the unsatisfiable core [2020-12-23 07:18:05,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:05,181 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 07:18:05,181 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,188 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:05,192 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2020-12-23 07:18:05,193 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,199 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:05,200 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,200 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2020-12-23 07:18:05,214 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:05,214 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-12-23 07:18:05,216 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:18:05,217 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,226 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:05,230 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2020-12-23 07:18:05,231 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,239 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:05,240 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,240 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2020-12-23 07:18:05,399 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2020-12-23 07:18:05,401 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,415 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:05,415 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,416 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:37 [2020-12-23 07:18:05,589 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2020-12-23 07:18:05,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,601 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:05,602 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,602 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2020-12-23 07:18:05,808 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2020-12-23 07:18:05,813 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,823 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:05,824 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:18:05,824 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2020-12-23 07:18:06,023 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2020-12-23 07:18:06,025 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:06,035 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:06,036 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:18:06,036 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2020-12-23 07:18:06,591 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2020-12-23 07:18:06,593 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:06,615 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:06,616 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 07:18:06,617 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:70 [2020-12-23 07:18:07,425 WARN L197 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-23 07:18:07,452 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 64 [2020-12-23 07:18:07,453 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:07,478 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:07,482 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 07:18:07,482 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:108, output treesize:146 [2020-12-23 07:18:09,109 WARN L197 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-23 07:18:09,929 WARN L197 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-12-23 07:18:10,607 WARN L197 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 07:18:10,635 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 120 [2020-12-23 07:18:10,637 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:10,661 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:10,666 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 07:18:10,666 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:155, output treesize:305 [2020-12-23 07:18:10,806 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2020-12-23 07:18:10,807 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:10,822 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:10,823 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:18:10,823 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:37 [2020-12-23 07:18:11,073 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 66 [2020-12-23 07:18:11,074 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:11,100 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:11,101 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 07:18:11,101 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:120 [2020-12-23 07:18:11,445 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:18:11,448 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:11,461 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:12,843 WARN L197 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-23 07:18:12,865 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 157 [2020-12-23 07:18:12,866 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:12,938 INFO L625 ElimStorePlain]: treesize reduction 21, result has 95.6 percent of original size [2020-12-23 07:18:12,940 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 07:18:12,941 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:226, output treesize:461 [2020-12-23 07:18:13,182 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 464 treesize of output 456 [2020-12-23 07:18:13,183 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 07:18:13,210 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 07:18:13,212 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 07:18:13,212 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:498, output treesize:1681 [2020-12-23 07:18:13,933 WARN L197 SmtUtils]: Spent 536.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-23 07:18:14,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:18:14,179 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:18:14,182 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:14,186 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 07:18:14,207 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:18:14,210 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:14,214 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 07:18:14,229 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:18:14,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:18:14,247 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:14,251 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 07:18:14,263 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:18:14,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:14,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 07:18:14,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:18:14,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:14,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 07:18:14,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:18:14,326 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:18:14,329 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:14,333 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 07:18:14,344 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:18:14,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:14,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 07:18:14,360 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:18:14,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:14,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 07:18:14,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:18:14,387 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:18:14,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:14,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 07:18:14,409 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:18:14,411 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:14,415 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 07:18:14,440 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:18:14,442 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:18:14,446 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 07:18:16,033 WARN L197 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-12-23 07:18:17,094 WARN L197 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-12-23 07:18:19,096 WARN L197 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-12-23 07:18:20,150 WARN L197 SmtUtils]: Spent 826.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-12-23 07:18:21,208 WARN L197 SmtUtils]: Spent 826.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-12-23 07:18:23,592 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 95 [2020-12-23 07:18:24,828 WARN L197 SmtUtils]: Spent 963.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-12-23 07:18:26,235 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 95 [2020-12-23 07:18:27,683 WARN L197 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 95 [2020-12-23 07:18:27,698 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:18:27,701 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:18:27,704 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:18:27,711 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:18:27,713 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:18:27,715 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:18:27,719 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2020-12-23 07:18:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:18:27,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:18:27,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 69 [2020-12-23 07:18:27,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416492770] [2020-12-23 07:18:27,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 07:18:27,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:27,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 07:18:27,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=4424, Unknown=2, NotChecked=0, Total=4692 [2020-12-23 07:18:27,929 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 69 states. [2020-12-23 07:18:30,992 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2020-12-23 07:18:31,449 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2020-12-23 07:18:33,430 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-12-23 07:18:34,371 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 53 [2020-12-23 07:18:34,676 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2020-12-23 07:18:35,581 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-12-23 07:18:35,872 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2020-12-23 07:18:36,131 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-12-23 07:18:36,639 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 72 [2020-12-23 07:18:37,323 WARN L197 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 76 [2020-12-23 07:18:39,362 WARN L197 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 197 DAG size of output: 106 [2020-12-23 07:18:41,325 WARN L197 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 198 DAG size of output: 102 [2020-12-23 07:18:43,241 WARN L197 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 240 DAG size of output: 136 [2020-12-23 07:18:45,320 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 97 [2020-12-23 07:18:45,925 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 98 [2020-12-23 07:18:47,149 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 130 [2020-12-23 07:18:47,468 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 59 [2020-12-23 07:18:49,800 WARN L197 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 160 DAG size of output: 102 [2020-12-23 07:18:50,495 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 81 [2020-12-23 07:18:51,936 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 213 DAG size of output: 109 [2020-12-23 07:18:52,641 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 147 [2020-12-23 07:18:53,218 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 128 [2020-12-23 07:18:53,864 WARN L197 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 74 [2020-12-23 07:18:58,672 WARN L197 SmtUtils]: Spent 4.59 s on a formula simplification. DAG size of input: 220 DAG size of output: 174 [2020-12-23 07:18:59,244 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 81 [2020-12-23 07:19:03,506 WARN L197 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 222 DAG size of output: 176 [2020-12-23 07:19:06,729 WARN L197 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 247 DAG size of output: 176 [2020-12-23 07:19:07,024 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 54 [2020-12-23 07:19:10,204 WARN L197 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 249 DAG size of output: 178 [2020-12-23 07:19:13,005 WARN L197 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 189 DAG size of output: 137 [2020-12-23 07:19:16,003 WARN L197 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 191 DAG size of output: 139 [2020-12-23 07:19:21,977 WARN L197 SmtUtils]: Spent 5.71 s on a formula simplification. DAG size of input: 224 DAG size of output: 176 [2020-12-23 07:19:28,173 WARN L197 SmtUtils]: Spent 5.83 s on a formula simplification. DAG size of input: 251 DAG size of output: 178 [2020-12-23 07:19:32,567 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 193 DAG size of output: 139 [2020-12-23 07:19:36,409 WARN L197 SmtUtils]: Spent 3.44 s on a formula simplification. DAG size of input: 224 DAG size of output: 183 [2020-12-23 07:19:40,345 WARN L197 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 251 DAG size of output: 185 [2020-12-23 07:19:43,908 WARN L197 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 193 DAG size of output: 146 [2020-12-23 07:19:46,325 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 182 DAG size of output: 145 [2020-12-23 07:19:48,801 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 209 DAG size of output: 147 [2020-12-23 07:19:49,293 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 71 [2020-12-23 07:19:49,768 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 130 [2020-12-23 07:19:51,287 WARN L197 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 194 DAG size of output: 132 [2020-12-23 07:19:51,684 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 56 [2020-12-23 07:19:52,164 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 131 [2020-12-23 07:19:54,422 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 195 DAG size of output: 133 [2020-12-23 07:19:54,792 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 57 [2020-12-23 07:19:54,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:19:54,836 INFO L93 Difference]: Finished difference Result 179 states and 212 transitions. [2020-12-23 07:19:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:19:54,836 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 57 [2020-12-23 07:19:54,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:19:54,837 INFO L225 Difference]: With dead ends: 179 [2020-12-23 07:19:54,838 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 07:19:54,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3488 ImplicationChecksByTransitivity, 102.5s TimeCoverageRelationStatistics Valid=1770, Invalid=13479, Unknown=3, NotChecked=0, Total=15252 [2020-12-23 07:19:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 07:19:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 78. [2020-12-23 07:19:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 07:19:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-12-23 07:19:54,866 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 57 [2020-12-23 07:19:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:19:54,867 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-12-23 07:19:54,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 07:19:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-12-23 07:19:54,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 07:19:54,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:19:54,867 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 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 07:19:55,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:19:55,070 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:19:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:19:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1842822072, now seen corresponding path program 11 times [2020-12-23 07:19:55,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:19:55,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092551479] [2020-12-23 07:19:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:19:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:19:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:19:55,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092551479] [2020-12-23 07:19:55,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122577849] [2020-12-23 07:19:55,250 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 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 07:19:55,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:19:55,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:19:55,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:19:55,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:19:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 07:19:56,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:19:56,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2020-12-23 07:19:56,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98156769] [2020-12-23 07:19:56,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:19:56,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:19:56,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:19:56,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:19:56,124 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 20 states. [2020-12-23 07:19:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:19:56,487 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2020-12-23 07:19:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:19:56,487 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-12-23 07:19:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:19:56,488 INFO L225 Difference]: With dead ends: 140 [2020-12-23 07:19:56,488 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 07:19:56,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:19:56,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 07:19:56,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-23 07:19:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 07:19:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2020-12-23 07:19:56,518 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 65 [2020-12-23 07:19:56,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:19:56,518 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2020-12-23 07:19:56,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:19:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2020-12-23 07:19:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 07:19:56,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:19:56,519 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 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 07:19:56,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:19:56,725 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:19:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:19:56,725 INFO L82 PathProgramCache]: Analyzing trace with hash -191400998, now seen corresponding path program 12 times [2020-12-23 07:19:56,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:19:56,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846514465] [2020-12-23 07:19:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:19:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:19:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 07:19:56,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846514465] [2020-12-23 07:19:56,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043733050] [2020-12-23 07:19:56,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:19:57,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 07:19:57,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:19:57,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:19:57,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:19:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-23 07:19:57,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:19:57,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2020-12-23 07:19:57,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151921188] [2020-12-23 07:19:57,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:19:57,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:19:57,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:19:57,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:19:57,535 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand 18 states. [2020-12-23 07:19:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:19:57,973 INFO L93 Difference]: Finished difference Result 132 states and 156 transitions. [2020-12-23 07:19:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:19:57,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-12-23 07:19:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:19:57,974 INFO L225 Difference]: With dead ends: 132 [2020-12-23 07:19:57,975 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 07:19:57,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:19:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 07:19:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-23 07:19:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 07:19:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-12-23 07:19:58,000 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 67 [2020-12-23 07:19:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:19:58,000 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-12-23 07:19:58,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:19:58,000 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-12-23 07:19:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 07:19:58,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:19:58,001 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 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 07:19:58,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:19:58,202 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:19:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:19:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1348867972, now seen corresponding path program 13 times [2020-12-23 07:19:58,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:19:58,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474008658] [2020-12-23 07:19:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:19:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:19:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 07:19:58,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474008658] [2020-12-23 07:19:58,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599962520] [2020-12-23 07:19:58,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:19:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:19:58,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:19:58,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:19:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:19:58,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:19:58,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2020-12-23 07:19:58,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596402529] [2020-12-23 07:19:58,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:19:58,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:19:58,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:19:58,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:19:58,685 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 16 states. [2020-12-23 07:19:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:19:58,984 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2020-12-23 07:19:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:19:58,985 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-12-23 07:19:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:19:58,986 INFO L225 Difference]: With dead ends: 113 [2020-12-23 07:19:58,986 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 07:19:58,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:19:58,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 07:19:59,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-12-23 07:19:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 07:19:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-12-23 07:19:59,021 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 68 [2020-12-23 07:19:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:19:59,021 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-12-23 07:19:59,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:19:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-12-23 07:19:59,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 07:19:59,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:19:59,022 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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 07:19:59,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:19:59,238 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:19:59,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:19:59,239 INFO L82 PathProgramCache]: Analyzing trace with hash 201069710, now seen corresponding path program 14 times [2020-12-23 07:19:59,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:19:59,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827972809] [2020-12-23 07:19:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:19:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:19:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-23 07:19:59,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827972809] [2020-12-23 07:19:59,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157241003] [2020-12-23 07:19:59,357 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:19:59,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:19:59,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:19:59,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:19:59,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:19:59,576 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:19:59,581 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:19:59,582 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:19:59,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:19:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-23 07:19:59,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:19:59,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 07:19:59,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555847138] [2020-12-23 07:19:59,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:19:59,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:19:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:19:59,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:19:59,641 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 11 states. [2020-12-23 07:19:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:19:59,845 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2020-12-23 07:19:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:19:59,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-12-23 07:19:59,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:19:59,847 INFO L225 Difference]: With dead ends: 116 [2020-12-23 07:19:59,847 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 07:19:59,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:19:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 07:19:59,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-12-23 07:19:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 07:19:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-12-23 07:19:59,890 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 71 [2020-12-23 07:19:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:19:59,891 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-12-23 07:19:59,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:19:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-12-23 07:19:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 07:19:59,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:19:59,892 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:00,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 07:20:00,106 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:00,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:00,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1437033862, now seen corresponding path program 15 times [2020-12-23 07:20:00,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:00,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38808993] [2020-12-23 07:20:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 21 proven. 49 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:20:00,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38808993] [2020-12-23 07:20:00,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578768790] [2020-12-23 07:20:00,366 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:20:00,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:20:00,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:20:00,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:20:00,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:01,181 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:20:01,182 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:20:01,184 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:20:01,187 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:20:01,189 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 07:20:01,191 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:20:01,197 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts