/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-tiling/pnr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:22:30,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:22:30,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:22:30,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:22:30,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:22:30,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:22:30,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:22:30,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:22:30,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:22:30,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:22:30,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:22:30,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:22:30,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:22:30,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:22:30,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:22:30,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:22:30,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:22:30,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:22:30,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:22:30,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:22:30,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:22:30,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:22:30,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:22:30,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:22:30,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:22:30,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:22:30,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:22:30,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:22:30,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:22:30,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:22:30,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:22:30,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:22:30,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:22:30,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:22:30,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:22:30,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:22:30,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:22:30,639 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:22:30,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:22:30,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:22:30,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:22:30,644 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:22:30,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:22:30,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:22:30,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:22:30,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:22:30,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:22:30,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:22:30,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:22:30,647 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:22:30,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:22:30,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:22:30,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:22:30,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:22:30,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:22:30,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:22:30,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:22:30,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:22:30,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:22:30,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:22:30,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:22:30,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:22:30,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:22:31,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:22:31,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:22:31,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:22:31,112 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:22:31,112 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:22:31,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr3.c [2021-01-06 10:22:31,196 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a63c8b623/4e52c9939c8049868173050b83a69d35/FLAGc145a0289 [2021-01-06 10:22:31,772 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:22:31,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c [2021-01-06 10:22:31,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a63c8b623/4e52c9939c8049868173050b83a69d35/FLAGc145a0289 [2021-01-06 10:22:32,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a63c8b623/4e52c9939c8049868173050b83a69d35 [2021-01-06 10:22:32,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:22:32,151 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:22:32,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:22:32,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:22:32,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:22:32,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:22:32" (1/1) ... [2021-01-06 10:22:32,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d67c19c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32, skipping insertion in model container [2021-01-06 10:22:32,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:22:32" (1/1) ... [2021-01-06 10:22:32,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:22:32,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:22:32,339 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c[395,408] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~value~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:22:32,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:22:32,375 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:22:32,391 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c[395,408] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~value~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:22:32,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:22:32,427 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:22:32,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32 WrapperNode [2021-01-06 10:22:32,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:22:32,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:22:32,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:22:32,430 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:22:32,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32" (1/1) ... [2021-01-06 10:22:32,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32" (1/1) ... [2021-01-06 10:22:32,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:22:32,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:22:32,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:22:32,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:22:32,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32" (1/1) ... [2021-01-06 10:22:32,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32" (1/1) ... [2021-01-06 10:22:32,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32" (1/1) ... [2021-01-06 10:22:32,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32" (1/1) ... [2021-01-06 10:22:32,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32" (1/1) ... [2021-01-06 10:22:32,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32" (1/1) ... [2021-01-06 10:22:32,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32" (1/1) ... [2021-01-06 10:22:32,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:22:32,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:22:32,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:22:32,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:22:32,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:22:32,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:22:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:22:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:22:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 10:22:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:22:32,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:22:32,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:22:33,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:22:33,111 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-01-06 10:22:33,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:22:33 BoogieIcfgContainer [2021-01-06 10:22:33,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:22:33,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:22:33,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:22:33,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:22:33,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:22:32" (1/3) ... [2021-01-06 10:22:33,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bb1ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:22:33, skipping insertion in model container [2021-01-06 10:22:33,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:22:32" (2/3) ... [2021-01-06 10:22:33,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bb1ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:22:33, skipping insertion in model container [2021-01-06 10:22:33,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:22:33" (3/3) ... [2021-01-06 10:22:33,123 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr3.c [2021-01-06 10:22:33,130 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:22:33,136 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:22:33,157 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:22:33,190 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:22:33,190 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:22:33,190 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:22:33,190 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:22:33,191 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:22:33,191 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:22:33,191 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:22:33,191 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:22:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-01-06 10:22:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:22:33,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:33,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:33,218 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:33,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1272104236, now seen corresponding path program 1 times [2021-01-06 10:22:33,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:33,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261873947] [2021-01-06 10:22:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:33,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261873947] [2021-01-06 10:22:33,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:22:33,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:22:33,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766476699] [2021-01-06 10:22:33,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:22:33,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:33,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:22:33,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:22:33,449 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2021-01-06 10:22:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:33,468 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-01-06 10:22:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:22:33,470 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:22:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:33,479 INFO L225 Difference]: With dead ends: 49 [2021-01-06 10:22:33,480 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 10:22:33,483 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 [2021-01-06 10:22:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 10:22:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 10:22:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:22:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-01-06 10:22:33,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 11 [2021-01-06 10:22:33,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:33,522 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-01-06 10:22:33,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:22:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-01-06 10:22:33,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:22:33,523 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:33,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:33,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:22:33,524 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:33,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:33,525 INFO L82 PathProgramCache]: Analyzing trace with hash 474273975, now seen corresponding path program 1 times [2021-01-06 10:22:33,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:33,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339470434] [2021-01-06 10:22:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:33,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339470434] [2021-01-06 10:22:33,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:22:33,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:22:33,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509756638] [2021-01-06 10:22:33,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:22:33,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:33,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:22:33,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:22:33,716 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2021-01-06 10:22:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:33,789 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-01-06 10:22:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:22:33,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 10:22:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:33,791 INFO L225 Difference]: With dead ends: 40 [2021-01-06 10:22:33,791 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:22:33,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:22:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:22:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2021-01-06 10:22:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:22:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 10:22:33,800 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2021-01-06 10:22:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:33,800 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 10:22:33,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:22:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 10:22:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:22:33,801 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:33,802 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] [2021-01-06 10:22:33,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:22:33,802 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:33,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:33,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1041179702, now seen corresponding path program 1 times [2021-01-06 10:22:33,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:33,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906062471] [2021-01-06 10:22:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:34,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906062471] [2021-01-06 10:22:34,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257241886] [2021-01-06 10:22:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:34,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:22:34,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:34,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:34,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:34,446 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 16 treesize of output 12 [2021-01-06 10:22:34,448 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:34,473 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:34,475 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:34,475 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:22:34,521 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:22:34,522 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:22:34,524 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:34,533 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:34,535 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:34,536 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:22:34,559 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-01-06 10:22:34,559 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-01-06 10:22:34,561 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:34,568 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:34,570 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:34,570 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2021-01-06 10:22:34,628 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:34,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:34,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:34,642 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:34,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:34,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-01-06 10:22:34,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193946106] [2021-01-06 10:22:34,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:22:34,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:34,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:22:34,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:22:34,668 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 15 states. [2021-01-06 10:22:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:35,672 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-01-06 10:22:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:22:35,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2021-01-06 10:22:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:35,677 INFO L225 Difference]: With dead ends: 74 [2021-01-06 10:22:35,678 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 10:22:35,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:22:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 10:22:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 26. [2021-01-06 10:22:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:22:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-01-06 10:22:35,700 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2021-01-06 10:22:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:35,701 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-01-06 10:22:35,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:22:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-01-06 10:22:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:22:35,702 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:35,702 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] [2021-01-06 10:22:35,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:22:35,916 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:35,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:35,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1813781568, now seen corresponding path program 1 times [2021-01-06 10:22:35,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:35,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369351883] [2021-01-06 10:22:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:36,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369351883] [2021-01-06 10:22:36,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739157714] [2021-01-06 10:22:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:36,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:22:36,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:36,225 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:22:36,259 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:36,268 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:36,270 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:36,270 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-01-06 10:22:36,305 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:22:36,305 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-01-06 10:22:36,307 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:36,312 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:36,314 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:36,314 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:10 [2021-01-06 10:22:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:36,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:36,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-01-06 10:22:36,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363991936] [2021-01-06 10:22:36,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:22:36,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:36,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:22:36,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:22:36,413 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 14 states. [2021-01-06 10:22:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:36,683 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-01-06 10:22:36,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:22:36,683 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2021-01-06 10:22:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:36,684 INFO L225 Difference]: With dead ends: 67 [2021-01-06 10:22:36,684 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 10:22:36,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:22:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 10:22:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-01-06 10:22:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 10:22:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-01-06 10:22:36,695 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 25 [2021-01-06 10:22:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:36,696 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-01-06 10:22:36,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:22:36,696 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-01-06 10:22:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:22:36,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:36,697 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] [2021-01-06 10:22:36,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:36,913 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:36,914 INFO L82 PathProgramCache]: Analyzing trace with hash 802664318, now seen corresponding path program 1 times [2021-01-06 10:22:36,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:36,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033676012] [2021-01-06 10:22:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:37,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033676012] [2021-01-06 10:22:37,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067799943] [2021-01-06 10:22:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:37,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:22:37,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:37,299 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 16 treesize of output 12 [2021-01-06 10:22:37,300 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:37,306 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:37,311 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:37,312 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2021-01-06 10:22:37,369 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:22:37,370 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-01-06 10:22:37,373 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:37,386 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:37,387 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:37,387 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2021-01-06 10:22:37,490 INFO L348 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-01-06 10:22:37,491 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 29 [2021-01-06 10:22:37,493 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:37,498 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:37,499 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:37,500 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:13 [2021-01-06 10:22:37,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:37,640 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:37,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:37,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-01-06 10:22:37,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594891322] [2021-01-06 10:22:37,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:22:37,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:37,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:22:37,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:22:37,663 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 18 states. [2021-01-06 10:22:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:38,359 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2021-01-06 10:22:38,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:22:38,360 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2021-01-06 10:22:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:38,366 INFO L225 Difference]: With dead ends: 95 [2021-01-06 10:22:38,367 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:22:38,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:22:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:22:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 30. [2021-01-06 10:22:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:22:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 10:22:38,392 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2021-01-06 10:22:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:38,393 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 10:22:38,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:22:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 10:22:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:22:38,394 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:38,395 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:38,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:38,610 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:38,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:38,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1792659018, now seen corresponding path program 2 times [2021-01-06 10:22:38,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:38,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331790547] [2021-01-06 10:22:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:38,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331790547] [2021-01-06 10:22:38,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696908155] [2021-01-06 10:22:38,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:38,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:22:38,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:22:38,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:22:38,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:38,871 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:22:38,872 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:38,876 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:38,880 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:38,880 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:10 [2021-01-06 10:22:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:38,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:38,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-01-06 10:22:38,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550998378] [2021-01-06 10:22:38,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:22:38,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:38,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:22:38,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:22:38,949 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 11 states. [2021-01-06 10:22:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:39,332 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2021-01-06 10:22:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:22:39,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2021-01-06 10:22:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:39,334 INFO L225 Difference]: With dead ends: 107 [2021-01-06 10:22:39,334 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 10:22:39,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:22:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 10:22:39,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 63. [2021-01-06 10:22:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:22:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2021-01-06 10:22:39,349 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 29 [2021-01-06 10:22:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:39,349 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2021-01-06 10:22:39,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:22:39,350 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2021-01-06 10:22:39,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:22:39,351 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:39,351 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:39,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:39,567 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:39,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1222444600, now seen corresponding path program 1 times [2021-01-06 10:22:39,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:39,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730467693] [2021-01-06 10:22:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:39,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730467693] [2021-01-06 10:22:39,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567786891] [2021-01-06 10:22:39,759 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 [2021-01-06 10:22:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:22:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:39,850 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 16 treesize of output 12 [2021-01-06 10:22:39,851 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:39,855 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:39,856 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:39,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2021-01-06 10:22:39,921 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:22:39,922 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:22:39,925 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:39,931 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:39,933 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:39,933 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2021-01-06 10:22:39,960 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-01-06 10:22:39,961 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-01-06 10:22:39,962 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:39,965 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:39,965 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:39,968 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2021-01-06 10:22:40,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:40,126 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:40,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:40,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-01-06 10:22:40,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364324094] [2021-01-06 10:22:40,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:22:40,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:40,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:22:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:22:40,157 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 19 states. [2021-01-06 10:22:41,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:41,215 INFO L93 Difference]: Finished difference Result 134 states and 162 transitions. [2021-01-06 10:22:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:22:41,216 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2021-01-06 10:22:41,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:41,217 INFO L225 Difference]: With dead ends: 134 [2021-01-06 10:22:41,217 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 10:22:41,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=403, Invalid=1853, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:22:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 10:22:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 34. [2021-01-06 10:22:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:22:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-01-06 10:22:41,234 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2021-01-06 10:22:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:41,235 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-01-06 10:22:41,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:22:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-01-06 10:22:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:22:41,241 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:41,241 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:41,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:22:41,455 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:41,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:41,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1469881388, now seen corresponding path program 3 times [2021-01-06 10:22:41,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:41,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593155484] [2021-01-06 10:22:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:41,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593155484] [2021-01-06 10:22:41,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178231480] [2021-01-06 10:22:41,795 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:41,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:22:41,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:22:41,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:22:41,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:42,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:42,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-06 10:22:42,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036089524] [2021-01-06 10:22:42,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:22:42,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:42,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:22:42,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:22:42,194 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 19 states. [2021-01-06 10:22:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:42,430 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-01-06 10:22:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:22:42,430 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2021-01-06 10:22:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:42,431 INFO L225 Difference]: With dead ends: 73 [2021-01-06 10:22:42,431 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 10:22:42,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:22:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 10:22:42,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2021-01-06 10:22:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:22:42,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-01-06 10:22:42,441 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2021-01-06 10:22:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:42,441 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-01-06 10:22:42,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:22:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-01-06 10:22:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 10:22:42,442 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:42,442 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:42,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:42,656 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:42,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1254276863, now seen corresponding path program 4 times [2021-01-06 10:22:42,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:42,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678139195] [2021-01-06 10:22:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:43,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678139195] [2021-01-06 10:22:43,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652095712] [2021-01-06 10:22:43,027 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:43,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:22:43,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:22:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 10:22:43,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:43,153 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:22:43,218 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 16 treesize of output 12 [2021-01-06 10:22:43,219 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,227 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:43,228 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,228 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 10:22:43,273 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:22:43,274 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:22:43,275 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,283 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:43,286 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,286 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:22:43,306 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:22:43,306 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:22:43,308 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,316 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:43,317 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,317 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:22:43,379 INFO L348 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-01-06 10:22:43,380 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-01-06 10:22:43,381 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,388 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:43,389 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,389 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-01-06 10:22:43,456 INFO L348 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2021-01-06 10:22:43,456 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-01-06 10:22:43,459 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,469 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:43,472 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,473 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:23 [2021-01-06 10:22:43,502 INFO L348 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-01-06 10:22:43,503 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 29 [2021-01-06 10:22:43,505 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,511 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:43,513 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:43,513 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:17 [2021-01-06 10:22:43,785 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:22:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:43,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:43,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-01-06 10:22:43,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973299693] [2021-01-06 10:22:43,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:22:43,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:43,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:22:43,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:22:43,823 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 26 states. [2021-01-06 10:22:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:45,960 INFO L93 Difference]: Finished difference Result 135 states and 163 transitions. [2021-01-06 10:22:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:22:45,960 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 43 [2021-01-06 10:22:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:45,962 INFO L225 Difference]: With dead ends: 135 [2021-01-06 10:22:45,962 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 10:22:45,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=621, Invalid=3039, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 10:22:45,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 10:22:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 48. [2021-01-06 10:22:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:22:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-01-06 10:22:45,975 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 43 [2021-01-06 10:22:45,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:45,975 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-01-06 10:22:45,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:22:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-01-06 10:22:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:22:45,976 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:45,977 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:46,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:46,192 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:46,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1506845451, now seen corresponding path program 5 times [2021-01-06 10:22:46,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:46,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523488223] [2021-01-06 10:22:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:46,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523488223] [2021-01-06 10:22:46,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296712880] [2021-01-06 10:22:46,388 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:46,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:22:46,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:22:46,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:22:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:46,589 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:22:46,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:46,598 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:46,600 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:46,600 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-01-06 10:22:46,627 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:22:46,628 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-01-06 10:22:46,631 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:46,642 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:46,645 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:22:46,645 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:20 [2021-01-06 10:22:46,774 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:46,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:46,780 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:22:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:46,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:46,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-01-06 10:22:46,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215907595] [2021-01-06 10:22:46,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:22:46,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:46,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:22:46,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:22:46,806 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 16 states. [2021-01-06 10:22:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:48,941 INFO L93 Difference]: Finished difference Result 361 states and 455 transitions. [2021-01-06 10:22:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 10:22:48,942 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2021-01-06 10:22:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:48,944 INFO L225 Difference]: With dead ends: 361 [2021-01-06 10:22:48,944 INFO L226 Difference]: Without dead ends: 359 [2021-01-06 10:22:48,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=460, Invalid=3322, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 10:22:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-01-06 10:22:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 88. [2021-01-06 10:22:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:22:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-01-06 10:22:48,972 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 47 [2021-01-06 10:22:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:48,972 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-01-06 10:22:48,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:22:48,972 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-01-06 10:22:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:22:48,973 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:48,973 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:49,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:22:49,180 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1444805837, now seen corresponding path program 1 times [2021-01-06 10:22:49,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:49,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084436859] [2021-01-06 10:22:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:49,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084436859] [2021-01-06 10:22:49,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227776860] [2021-01-06 10:22:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:49,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:22:49,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:49,540 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 16 treesize of output 12 [2021-01-06 10:22:49,541 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:49,547 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:49,547 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:49,548 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2021-01-06 10:22:49,595 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:22:49,596 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-01-06 10:22:49,597 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:49,602 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:49,603 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:49,603 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2021-01-06 10:22:49,667 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-01-06 10:22:49,668 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-01-06 10:22:49,669 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:49,673 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:49,675 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:49,675 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-01-06 10:22:49,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:49,956 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:49,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:49,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-01-06 10:22:49,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644474618] [2021-01-06 10:22:49,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:22:49,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:22:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:22:49,988 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 25 states. [2021-01-06 10:22:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:52,461 INFO L93 Difference]: Finished difference Result 229 states and 282 transitions. [2021-01-06 10:22:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:22:52,461 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 47 [2021-01-06 10:22:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:52,463 INFO L225 Difference]: With dead ends: 229 [2021-01-06 10:22:52,463 INFO L226 Difference]: Without dead ends: 227 [2021-01-06 10:22:52,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=636, Invalid=3920, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 10:22:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-01-06 10:22:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 52. [2021-01-06 10:22:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:22:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-01-06 10:22:52,479 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 47 [2021-01-06 10:22:52,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:52,480 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-01-06 10:22:52,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:22:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-01-06 10:22:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:22:52,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:52,481 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:52,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:52,694 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:52,696 INFO L82 PathProgramCache]: Analyzing trace with hash 495980523, now seen corresponding path program 6 times [2021-01-06 10:22:52,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:52,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794664171] [2021-01-06 10:22:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:52,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794664171] [2021-01-06 10:22:52,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606350216] [2021-01-06 10:22:52,901 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:53,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 10:22:53,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:22:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:22:53,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:53,266 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:22:53,267 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:53,276 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:53,281 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:22:53,282 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2021-01-06 10:22:53,422 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:53,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:22:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:53,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:53,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-01-06 10:22:53,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344883491] [2021-01-06 10:22:53,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:22:53,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:53,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:22:53,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:22:53,463 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 18 states. [2021-01-06 10:22:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:22:56,956 INFO L93 Difference]: Finished difference Result 516 states and 646 transitions. [2021-01-06 10:22:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-01-06 10:22:56,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2021-01-06 10:22:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:22:56,960 INFO L225 Difference]: With dead ends: 516 [2021-01-06 10:22:56,960 INFO L226 Difference]: Without dead ends: 514 [2021-01-06 10:22:56,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3355 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=862, Invalid=8258, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 10:22:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-01-06 10:22:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 105. [2021-01-06 10:22:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 10:22:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2021-01-06 10:22:57,003 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 51 [2021-01-06 10:22:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:22:57,004 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2021-01-06 10:22:57,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:22:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2021-01-06 10:22:57,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:22:57,005 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:22:57,006 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:22:57,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:57,221 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:22:57,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:22:57,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1875758739, now seen corresponding path program 1 times [2021-01-06 10:22:57,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:22:57,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347898087] [2021-01-06 10:22:57,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:22:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:57,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347898087] [2021-01-06 10:22:57,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880621126] [2021-01-06 10:22:57,476 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:22:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:22:57,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:22:57,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:22:57,623 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 16 treesize of output 12 [2021-01-06 10:22:57,624 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:57,629 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:57,630 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:57,630 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2021-01-06 10:22:57,670 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:22:57,671 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:22:57,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:57,680 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:57,681 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:57,681 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2021-01-06 10:22:57,699 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:22:57,699 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-01-06 10:22:57,700 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:22:57,702 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:22:57,703 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:22:57,703 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 10:22:58,006 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:58,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:22:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:22:58,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:22:58,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-01-06 10:22:58,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850861038] [2021-01-06 10:22:58,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:22:58,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:22:58,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:22:58,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:22:58,060 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand 27 states. [2021-01-06 10:23:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:01,506 INFO L93 Difference]: Finished difference Result 267 states and 322 transitions. [2021-01-06 10:23:01,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 10:23:01,506 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2021-01-06 10:23:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:01,509 INFO L225 Difference]: With dead ends: 267 [2021-01-06 10:23:01,509 INFO L226 Difference]: Without dead ends: 265 [2021-01-06 10:23:01,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=921, Invalid=6389, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 10:23:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-01-06 10:23:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 56. [2021-01-06 10:23:01,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:23:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-01-06 10:23:01,529 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 51 [2021-01-06 10:23:01,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:01,529 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-01-06 10:23:01,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:23:01,529 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-01-06 10:23:01,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:23:01,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:01,530 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:01,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:23:01,735 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:01,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:01,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1093511199, now seen corresponding path program 7 times [2021-01-06 10:23:01,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:01,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906431391] [2021-01-06 10:23:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:02,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906431391] [2021-01-06 10:23:02,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276212791] [2021-01-06 10:23:02,294 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:02,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:23:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:02,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:02,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-01-06 10:23:02,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989830650] [2021-01-06 10:23:02,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:23:02,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:02,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:23:02,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:23:02,898 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 27 states. [2021-01-06 10:23:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:03,309 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2021-01-06 10:23:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:23:03,313 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2021-01-06 10:23:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:03,313 INFO L225 Difference]: With dead ends: 107 [2021-01-06 10:23:03,313 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:23:03,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:23:03,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:23:03,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-01-06 10:23:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:23:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-01-06 10:23:03,330 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 55 [2021-01-06 10:23:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:03,330 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-01-06 10:23:03,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:23:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-01-06 10:23:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:23:03,331 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:03,331 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:03,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:23:03,545 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:03,546 INFO L82 PathProgramCache]: Analyzing trace with hash -290174348, now seen corresponding path program 8 times [2021-01-06 10:23:03,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:03,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831433007] [2021-01-06 10:23:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:03,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831433007] [2021-01-06 10:23:03,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90155928] [2021-01-06 10:23:03,834 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:03,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:23:03,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:03,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 10:23:03,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:03,968 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:04,041 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 16 treesize of output 12 [2021-01-06 10:23:04,044 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,049 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:04,050 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,050 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2021-01-06 10:23:04,094 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:04,094 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:23:04,096 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,102 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:04,104 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,104 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2021-01-06 10:23:04,123 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:04,123 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:23:04,126 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,132 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:04,134 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,134 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2021-01-06 10:23:04,177 INFO L348 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-01-06 10:23:04,177 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-01-06 10:23:04,178 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,182 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:04,183 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,183 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2021-01-06 10:23:04,246 INFO L348 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-01-06 10:23:04,246 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-01-06 10:23:04,251 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,258 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:04,260 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,260 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:22 [2021-01-06 10:23:04,286 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-01-06 10:23:04,287 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-01-06 10:23:04,288 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,293 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:04,294 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:04,294 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-01-06 10:23:04,791 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:04,798 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:04,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:04,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-01-06 10:23:04,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586232863] [2021-01-06 10:23:04,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:23:04,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:04,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:23:04,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:23:04,851 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 33 states. [2021-01-06 10:23:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:12,235 INFO L93 Difference]: Finished difference Result 281 states and 336 transitions. [2021-01-06 10:23:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-01-06 10:23:12,236 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2021-01-06 10:23:12,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:12,238 INFO L225 Difference]: With dead ends: 281 [2021-01-06 10:23:12,238 INFO L226 Difference]: Without dead ends: 279 [2021-01-06 10:23:12,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4818 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1895, Invalid=13111, Unknown=0, NotChecked=0, Total=15006 [2021-01-06 10:23:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-01-06 10:23:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 70. [2021-01-06 10:23:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:23:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2021-01-06 10:23:12,263 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 65 [2021-01-06 10:23:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:12,264 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2021-01-06 10:23:12,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:23:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2021-01-06 10:23:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:23:12,264 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:12,264 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:12,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:23:12,466 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:12,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1764481558, now seen corresponding path program 9 times [2021-01-06 10:23:12,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:12,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240765086] [2021-01-06 10:23:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:12,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240765086] [2021-01-06 10:23:12,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684484769] [2021-01-06 10:23:12,730 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:13,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:23:13,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:13,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 10:23:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:13,153 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:23:13,158 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:13,167 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:13,168 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:13,168 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-01-06 10:23:13,192 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:13,192 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-01-06 10:23:13,194 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:13,204 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:13,206 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:13,206 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:20 [2021-01-06 10:23:13,456 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:13,459 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:13,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:13,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-01-06 10:23:13,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648093277] [2021-01-06 10:23:13,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:23:13,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:13,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:23:13,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:23:13,532 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 23 states. [2021-01-06 10:23:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:28,334 INFO L93 Difference]: Finished difference Result 1888 states and 2426 transitions. [2021-01-06 10:23:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2021-01-06 10:23:28,334 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2021-01-06 10:23:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:28,344 INFO L225 Difference]: With dead ends: 1888 [2021-01-06 10:23:28,344 INFO L226 Difference]: Without dead ends: 1886 [2021-01-06 10:23:28,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46397 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=5310, Invalid=97410, Unknown=0, NotChecked=0, Total=102720 [2021-01-06 10:23:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-01-06 10:23:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 130. [2021-01-06 10:23:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 10:23:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2021-01-06 10:23:28,437 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 69 [2021-01-06 10:23:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:28,438 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2021-01-06 10:23:28,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:23:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2021-01-06 10:23:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:23:28,439 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:28,439 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:28,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:28,653 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:28,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1501126440, now seen corresponding path program 2 times [2021-01-06 10:23:28,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:28,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628131804] [2021-01-06 10:23:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:29,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628131804] [2021-01-06 10:23:29,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049673465] [2021-01-06 10:23:29,015 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 [2021-01-06 10:23:29,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:23:29,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 10:23:29,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:29,166 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 16 treesize of output 12 [2021-01-06 10:23:29,167 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:29,175 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:29,175 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:29,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 10:23:29,196 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-01-06 10:23:29,213 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:29,214 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 57 [2021-01-06 10:23:29,217 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:29,222 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:29,223 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:29,232 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:29,233 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:29,233 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:28 [2021-01-06 10:23:29,272 INFO L348 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-01-06 10:23:29,272 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-01-06 10:23:29,274 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:29,284 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:29,286 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:29,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:28 [2021-01-06 10:23:29,738 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:29,745 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:29,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:29,748 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:29,749 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:29,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:29,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2021-01-06 10:23:29,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804260698] [2021-01-06 10:23:29,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:23:29,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:29,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:23:29,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:23:29,803 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand 28 states. [2021-01-06 10:23:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:32,714 INFO L93 Difference]: Finished difference Result 318 states and 397 transitions. [2021-01-06 10:23:32,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 10:23:32,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 69 [2021-01-06 10:23:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:32,716 INFO L225 Difference]: With dead ends: 318 [2021-01-06 10:23:32,717 INFO L226 Difference]: Without dead ends: 316 [2021-01-06 10:23:32,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=289, Invalid=2791, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 10:23:32,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-01-06 10:23:32,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 168. [2021-01-06 10:23:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 10:23:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 215 transitions. [2021-01-06 10:23:32,780 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 215 transitions. Word has length 69 [2021-01-06 10:23:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:32,781 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 215 transitions. [2021-01-06 10:23:32,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:23:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 215 transitions. [2021-01-06 10:23:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:23:32,781 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:32,782 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:32,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:23:32,983 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:32,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:32,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1077479718, now seen corresponding path program 1 times [2021-01-06 10:23:32,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:32,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058397978] [2021-01-06 10:23:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:33,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058397978] [2021-01-06 10:23:33,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038929072] [2021-01-06 10:23:33,320 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:33,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 10:23:33,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:33,474 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 16 treesize of output 12 [2021-01-06 10:23:33,475 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,480 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:33,481 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,481 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2021-01-06 10:23:33,532 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:33,532 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:23:33,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,542 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:33,543 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2021-01-06 10:23:33,563 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:33,563 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:23:33,564 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,572 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:33,573 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,573 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2021-01-06 10:23:33,628 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:33,628 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:23:33,631 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,638 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:33,640 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,640 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2021-01-06 10:23:33,664 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:33,665 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-01-06 10:23:33,666 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,673 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:33,673 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,673 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2021-01-06 10:23:33,743 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-01-06 10:23:33,743 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-01-06 10:23:33,744 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,751 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:33,752 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,752 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-01-06 10:23:34,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:34,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:34,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:34,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-01-06 10:23:34,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009624632] [2021-01-06 10:23:34,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:23:34,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:34,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:23:34,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:23:34,337 INFO L87 Difference]: Start difference. First operand 168 states and 215 transitions. Second operand 33 states. [2021-01-06 10:23:38,193 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-01-06 10:23:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:42,930 INFO L93 Difference]: Finished difference Result 611 states and 724 transitions. [2021-01-06 10:23:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-01-06 10:23:42,931 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 69 [2021-01-06 10:23:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:42,934 INFO L225 Difference]: With dead ends: 611 [2021-01-06 10:23:42,934 INFO L226 Difference]: Without dead ends: 609 [2021-01-06 10:23:42,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6828 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1988, Invalid=17472, Unknown=0, NotChecked=0, Total=19460 [2021-01-06 10:23:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-01-06 10:23:42,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 74. [2021-01-06 10:23:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 10:23:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-01-06 10:23:42,973 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 69 [2021-01-06 10:23:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:42,974 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-01-06 10:23:42,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:23:42,974 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-01-06 10:23:42,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:23:42,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:42,975 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:43,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:23:43,187 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:43,188 INFO L82 PathProgramCache]: Analyzing trace with hash 739071584, now seen corresponding path program 10 times [2021-01-06 10:23:43,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:43,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493423184] [2021-01-06 10:23:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:43,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493423184] [2021-01-06 10:23:43,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914069085] [2021-01-06 10:23:43,454 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 [2021-01-06 10:23:43,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:23:43,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:43,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:23:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:43,604 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:23:43,605 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:43,613 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:43,615 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:43,616 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2021-01-06 10:23:43,949 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:43,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:43,955 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:44,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:44,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2021-01-06 10:23:44,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632638803] [2021-01-06 10:23:44,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:23:44,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:44,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:23:44,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:23:44,036 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 25 states. [2021-01-06 10:24:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:21,902 INFO L93 Difference]: Finished difference Result 3968 states and 5130 transitions. [2021-01-06 10:24:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 654 states. [2021-01-06 10:24:21,903 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2021-01-06 10:24:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:21,918 INFO L225 Difference]: With dead ends: 3968 [2021-01-06 10:24:21,918 INFO L226 Difference]: Without dead ends: 3966 [2021-01-06 10:24:21,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 657 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206181 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=15513, Invalid=418109, Unknown=0, NotChecked=0, Total=433622 [2021-01-06 10:24:21,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-01-06 10:24:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 147. [2021-01-06 10:24:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 10:24:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 184 transitions. [2021-01-06 10:24:22,094 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 184 transitions. Word has length 73 [2021-01-06 10:24:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:22,094 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 184 transitions. [2021-01-06 10:24:22,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:24:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 184 transitions. [2021-01-06 10:24:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:24:22,095 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:22,095 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:22,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:22,311 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:22,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1106295582, now seen corresponding path program 2 times [2021-01-06 10:24:22,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:22,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544673463] [2021-01-06 10:24:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:22,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544673463] [2021-01-06 10:24:22,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860496064] [2021-01-06 10:24:22,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:22,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:24:22,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:22,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:24:22,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:22,955 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 16 treesize of output 12 [2021-01-06 10:24:22,956 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:22,961 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:22,962 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:22,962 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2021-01-06 10:24:23,021 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:24:23,021 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:24:23,024 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:23,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:23,033 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:23,033 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2021-01-06 10:24:23,052 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:24:23,053 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-01-06 10:24:23,054 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:23,056 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:23,056 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:23,056 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 10:24:23,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:23,698 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:23,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:23,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-01-06 10:24:23,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636412240] [2021-01-06 10:24:23,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:24:23,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:23,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:24:23,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:24:23,756 INFO L87 Difference]: Start difference. First operand 147 states and 184 transitions. Second operand 35 states. [2021-01-06 10:24:26,791 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-01-06 10:24:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:34,007 INFO L93 Difference]: Finished difference Result 437 states and 519 transitions. [2021-01-06 10:24:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-01-06 10:24:34,008 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 73 [2021-01-06 10:24:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:34,010 INFO L225 Difference]: With dead ends: 437 [2021-01-06 10:24:34,010 INFO L226 Difference]: Without dead ends: 435 [2021-01-06 10:24:34,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7270 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2061, Invalid=18819, Unknown=0, NotChecked=0, Total=20880 [2021-01-06 10:24:34,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-01-06 10:24:34,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 78. [2021-01-06 10:24:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 10:24:34,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-01-06 10:24:34,064 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 73 [2021-01-06 10:24:34,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:34,065 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-01-06 10:24:34,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:24:34,065 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-01-06 10:24:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 10:24:34,065 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:34,066 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:34,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:34,280 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash 665672662, now seen corresponding path program 11 times [2021-01-06 10:24:34,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:34,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527521744] [2021-01-06 10:24:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 129 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:35,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527521744] [2021-01-06 10:24:35,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887702479] [2021-01-06 10:24:35,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:35,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 10:24:35,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:35,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:24:35,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 162 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:36,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:36,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-01-06 10:24:36,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864773917] [2021-01-06 10:24:36,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:24:36,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:24:36,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:24:36,548 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 35 states. [2021-01-06 10:24:37,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:37,267 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2021-01-06 10:24:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:24:37,268 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2021-01-06 10:24:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:37,269 INFO L225 Difference]: With dead ends: 141 [2021-01-06 10:24:37,269 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 10:24:37,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:24:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 10:24:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2021-01-06 10:24:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:24:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2021-01-06 10:24:37,344 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 77 [2021-01-06 10:24:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:37,344 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2021-01-06 10:24:37,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:24:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2021-01-06 10:24:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 10:24:37,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:37,346 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:37,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:37,551 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:37,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:37,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1177079337, now seen corresponding path program 12 times [2021-01-06 10:24:37,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:37,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635922522] [2021-01-06 10:24:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:38,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635922522] [2021-01-06 10:24:38,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044746441] [2021-01-06 10:24:38,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:38,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 10:24:38,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:38,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 10:24:38,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:39,149 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 16 treesize of output 12 [2021-01-06 10:24:39,150 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,167 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,168 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,169 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2021-01-06 10:24:39,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,245 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 29 treesize of output 28 [2021-01-06 10:24:39,251 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,270 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,272 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:30 [2021-01-06 10:24:39,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,287 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 29 treesize of output 28 [2021-01-06 10:24:39,289 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,308 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,310 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,310 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:30 [2021-01-06 10:24:39,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,388 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 24 treesize of output 23 [2021-01-06 10:24:39,389 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,408 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,410 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,410 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-01-06 10:24:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,501 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,501 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-01-06 10:24:39,503 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,528 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,530 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-01-06 10:24:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,551 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,552 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-01-06 10:24:39,553 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,575 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,577 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,577 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:37 [2021-01-06 10:24:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,668 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,668 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-01-06 10:24:39,670 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,693 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,694 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,694 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2021-01-06 10:24:39,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,798 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,799 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 53 [2021-01-06 10:24:39,800 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,829 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,831 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,831 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:49 [2021-01-06 10:24:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,858 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,858 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 53 [2021-01-06 10:24:39,860 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,885 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,887 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:39,887 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:49 [2021-01-06 10:24:39,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:39,994 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:39,994 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2021-01-06 10:24:39,995 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:40,020 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:40,021 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:40,021 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:85 [2021-01-06 10:24:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,133 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:40,133 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 68 [2021-01-06 10:24:40,135 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:40,166 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:40,168 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:40,168 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:101, output treesize:85 [2021-01-06 10:24:40,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:40,258 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:40,259 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 68 [2021-01-06 10:24:40,261 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:40,288 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:40,290 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:40,290 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:101, output treesize:58 [2021-01-06 10:24:41,626 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:41,628 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:24:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:41,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:41,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28] total 46 [2021-01-06 10:24:41,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632349510] [2021-01-06 10:24:41,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 10:24:41,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:41,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 10:24:41,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1903, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 10:24:41,756 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 46 states. [2021-01-06 10:24:42,497 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-01-06 10:24:45,180 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-01-06 10:24:45,729 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-01-06 10:24:45,935 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-01-06 10:24:46,281 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 10:24:46,704 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-01-06 10:24:46,907 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-01-06 10:24:47,351 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-01-06 10:24:47,592 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-01-06 10:24:47,768 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-01-06 10:24:48,144 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-01-06 10:24:48,402 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-01-06 10:24:48,594 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-01-06 10:24:48,814 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-01-06 10:24:49,208 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-01-06 10:24:49,492 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-01-06 10:24:49,728 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-01-06 10:24:50,124 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-01-06 10:24:50,370 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-01-06 10:24:50,729 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-01-06 10:24:51,000 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-01-06 10:24:51,301 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-01-06 10:24:51,526 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-01-06 10:24:51,972 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-01-06 10:24:52,476 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-01-06 10:24:52,779 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-01-06 10:24:53,119 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-01-06 10:24:53,403 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-01-06 10:24:53,955 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-01-06 10:24:54,109 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-01-06 10:24:54,441 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-01-06 10:24:54,854 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-01-06 10:24:55,019 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-01-06 10:24:55,230 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-01-06 10:24:55,552 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-01-06 10:24:55,812 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-01-06 10:24:56,143 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-01-06 10:24:56,547 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-01-06 10:24:56,743 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-01-06 10:24:56,918 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-01-06 10:24:57,495 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-01-06 10:24:57,690 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-01-06 10:24:57,948 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-01-06 10:24:58,148 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-01-06 10:24:58,348 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-01-06 10:24:59,064 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-01-06 10:24:59,535 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 10:25:00,239 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-01-06 10:25:01,479 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-01-06 10:25:01,681 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-01-06 10:25:02,005 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-01-06 10:25:02,915 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-01-06 10:25:03,545 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-01-06 10:25:03,869 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-01-06 10:25:04,486 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-01-06 10:25:04,922 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-01-06 10:25:05,221 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-01-06 10:25:05,398 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-01-06 10:25:05,612 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-01-06 10:25:05,907 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-01-06 10:25:06,435 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-01-06 10:25:06,617 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-01-06 10:25:07,135 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-01-06 10:25:07,313 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-01-06 10:25:07,667 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-01-06 10:25:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:25:10,575 INFO L93 Difference]: Finished difference Result 493 states and 595 transitions. [2021-01-06 10:25:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-01-06 10:25:10,579 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 87 [2021-01-06 10:25:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:25:10,581 INFO L225 Difference]: With dead ends: 493 [2021-01-06 10:25:10,581 INFO L226 Difference]: Without dead ends: 491 [2021-01-06 10:25:10,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15093 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=4241, Invalid=37989, Unknown=0, NotChecked=0, Total=42230 [2021-01-06 10:25:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-01-06 10:25:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 92. [2021-01-06 10:25:10,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:25:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-01-06 10:25:10,654 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 87 [2021-01-06 10:25:10,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:25:10,654 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-01-06 10:25:10,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 10:25:10,654 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-01-06 10:25:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:25:10,655 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:25:10,655 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:25:10,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:25:10,871 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:25:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:25:10,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1413859103, now seen corresponding path program 13 times [2021-01-06 10:25:10,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:25:10,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890571284] [2021-01-06 10:25:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:25:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:25:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:25:11,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890571284] [2021-01-06 10:25:11,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283361345] [2021-01-06 10:25:11,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:25:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:25:11,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:25:11,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:25:11,521 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:25:11,522 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:25:11,534 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:25:11,535 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:25:11,535 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-01-06 10:25:11,560 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:25:11,560 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-01-06 10:25:11,562 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:25:11,574 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:25:11,575 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:25:11,576 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:20 [2021-01-06 10:25:12,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:25:12,129 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:25:12,131 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:25:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:25:12,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:25:12,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 30 [2021-01-06 10:25:12,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199098680] [2021-01-06 10:25:12,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:25:12,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:25:12,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:25:12,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:25:12,212 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 30 states. [2021-01-06 10:26:14,944 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-01-06 10:26:26,845 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-01-06 10:26:30,879 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 34