/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-patterns/array17_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:53:24,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:53:24,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:53:24,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:53:24,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:53:24,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:53:24,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:53:24,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:53:24,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:53:24,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:53:24,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:53:24,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:53:24,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:53:24,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:53:24,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:53:24,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:53:24,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:53:24,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:53:24,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:53:24,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:53:24,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:53:24,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:53:24,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:53:24,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:53:24,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 10:53:24,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 10:53:24,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 10:53:24,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 10:53:24,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 10:53:24,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 10:53:24,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:53:24,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:53:24,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:53:24,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:53:24,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:53:24,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:53:24,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:53:24,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:53:24,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:53:24,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:53:24,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:53:24,222 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 10:53:24,250 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:53:24,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:53:24,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:53:24,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:53:24,252 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:53:24,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:53:24,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:53:24,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:53:24,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:53:24,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:53:24,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:53:24,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:53:24,254 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:53:24,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:53:24,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:53:24,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:53:24,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:53:24,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:53:24,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:53:24,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:53:24,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:53:24,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:53:24,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:53:24,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:53:24,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:53:24,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:53:24,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:53:24,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:53:24,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:53:24,638 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:53:24,639 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:53:24,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array17_pattern.c [2021-01-06 10:53:24,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/209e81af9/3aae44eccc804439b76a38933674f465/FLAG8947070c0 [2021-01-06 10:53:25,423 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:53:25,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-patterns/array17_pattern.c [2021-01-06 10:53:25,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/209e81af9/3aae44eccc804439b76a38933674f465/FLAG8947070c0 [2021-01-06 10:53:25,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/209e81af9/3aae44eccc804439b76a38933674f465 [2021-01-06 10:53:25,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:53:25,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:53:25,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:53:25,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:53:25,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:53:25,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:53:25" (1/1) ... [2021-01-06 10:53:25,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6e60dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:25, skipping insertion in model container [2021-01-06 10:53:25,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:53:25" (1/1) ... [2021-01-06 10:53:25,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:53:25,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:53:25,976 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-patterns/array17_pattern.c[1441,1454] left hand side expression in assignment: lhs: VariableLHS[~ARR_SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~row~0,]]],[IdentifierExpression[~column~0,]]] left hand side expression in assignment: lhs: VariableLHS[~index1~0,] left hand side expression in assignment: lhs: VariableLHS[~index2~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~index1~0,]]],[IdentifierExpression[~index2~0,]]] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~index1~0,]]],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMINUS,IdentifierExpression[~ARR_SIZE~0,GLOBAL],IntegerLiteral[1]],IdentifierExpression[~index2~0,]]]] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2021-01-06 10:53:26,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:53:26,012 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:53:26,026 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-patterns/array17_pattern.c[1441,1454] left hand side expression in assignment: lhs: VariableLHS[~ARR_SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~row~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~column~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~index1~0,] left hand side expression in assignment: lhs: VariableLHS[~index2~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~index1~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~index2~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~index1~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMINUS,IdentifierExpression[~ARR_SIZE~0,GLOBAL],IntegerLiteral[1]],IdentifierExpression[~index2~0,]]]]]] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2021-01-06 10:53:26,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:53:26,064 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:53:26,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26 WrapperNode [2021-01-06 10:53:26,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:53:26,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:53:26,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:53:26,067 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:53:26,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26" (1/1) ... [2021-01-06 10:53:26,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26" (1/1) ... [2021-01-06 10:53:26,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:53:26,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:53:26,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:53:26,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:53:26,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26" (1/1) ... [2021-01-06 10:53:26,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26" (1/1) ... [2021-01-06 10:53:26,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26" (1/1) ... [2021-01-06 10:53:26,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26" (1/1) ... [2021-01-06 10:53:26,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26" (1/1) ... [2021-01-06 10:53:26,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26" (1/1) ... [2021-01-06 10:53:26,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26" (1/1) ... [2021-01-06 10:53:26,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:53:26,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:53:26,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:53:26,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:53:26,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26" (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 10:53:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:53:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:53:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:53:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:53:26,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:53:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:53:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:53:26,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:53:26,724 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-01-06 10:53:26,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:53:26 BoogieIcfgContainer [2021-01-06 10:53:26,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:53:26,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:53:26,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:53:26,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:53:26,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:53:25" (1/3) ... [2021-01-06 10:53:26,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37afe080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:53:26, skipping insertion in model container [2021-01-06 10:53:26,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:53:26" (2/3) ... [2021-01-06 10:53:26,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37afe080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:53:26, skipping insertion in model container [2021-01-06 10:53:26,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:53:26" (3/3) ... [2021-01-06 10:53:26,750 INFO L111 eAbstractionObserver]: Analyzing ICFG array17_pattern.c [2021-01-06 10:53:26,759 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:53:26,764 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:53:26,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:53:26,843 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:53:26,844 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:53:26,844 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:53:26,844 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:53:26,844 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:53:26,844 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:53:26,844 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:53:26,845 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:53:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-01-06 10:53:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:53:26,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:26,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:26,869 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:26,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:26,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1763201290, now seen corresponding path program 1 times [2021-01-06 10:53:26,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:26,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920085288] [2021-01-06 10:53:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:53:27,096 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 10:53:27,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920085288] [2021-01-06 10:53:27,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:53:27,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:53:27,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797856894] [2021-01-06 10:53:27,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:53:27,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:27,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:53:27,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:53:27,119 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2021-01-06 10:53:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:53:27,138 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2021-01-06 10:53:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:53:27,140 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:53:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:53:27,149 INFO L225 Difference]: With dead ends: 57 [2021-01-06 10:53:27,150 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:53:27,153 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 10:53:27,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:53:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 10:53:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:53:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-01-06 10:53:27,188 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 11 [2021-01-06 10:53:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:53:27,188 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-01-06 10:53:27,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:53:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-01-06 10:53:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:53:27,189 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:27,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:27,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:53:27,190 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:27,191 INFO L82 PathProgramCache]: Analyzing trace with hash -204009896, now seen corresponding path program 1 times [2021-01-06 10:53:27,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:27,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23604940] [2021-01-06 10:53:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:27,210 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:53:27,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547219587] [2021-01-06 10:53:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:53:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:53:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:53:27,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:53:27,470 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 10:53:27,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23604940] [2021-01-06 10:53:27,471 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:53:27,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547219587] [2021-01-06 10:53:27,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:53:27,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:53:27,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491656601] [2021-01-06 10:53:27,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:53:27,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:53:27,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:53:27,475 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2021-01-06 10:53:27,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:53:27,754 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-01-06 10:53:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:53:27,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2021-01-06 10:53:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:53:27,756 INFO L225 Difference]: With dead ends: 53 [2021-01-06 10:53:27,756 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 10:53:27,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:53:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 10:53:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-01-06 10:53:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:53:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-01-06 10:53:27,764 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2021-01-06 10:53:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:53:27,765 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-01-06 10:53:27,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:53:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-01-06 10:53:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:53:27,766 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:27,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:27,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:53:27,980 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:27,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1717183807, now seen corresponding path program 1 times [2021-01-06 10:53:27,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:27,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632458562] [2021-01-06 10:53:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:28,000 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:53:28,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484471929] [2021-01-06 10:53:28,002 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 10:53:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:53:28,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:53:28,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:53:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:53:28,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632458562] [2021-01-06 10:53:28,170 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:53:28,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484471929] [2021-01-06 10:53:28,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:53:28,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:53:28,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569085382] [2021-01-06 10:53:28,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:53:28,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:28,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:53:28,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:53:28,173 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2021-01-06 10:53:28,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:53:28,270 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-01-06 10:53:28,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:53:28,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-01-06 10:53:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:53:28,272 INFO L225 Difference]: With dead ends: 55 [2021-01-06 10:53:28,272 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 10:53:28,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:53:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 10:53:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-01-06 10:53:28,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:53:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-01-06 10:53:28,279 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-01-06 10:53:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:53:28,280 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-01-06 10:53:28,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:53:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-01-06 10:53:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:53:28,281 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:28,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:28,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:53:28,496 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash 817488613, now seen corresponding path program 1 times [2021-01-06 10:53:28,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:28,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247800270] [2021-01-06 10:53:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:28,514 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:53:28,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307953046] [2021-01-06 10:53:28,514 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 10:53:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:53:28,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 10:53:28,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:53:28,803 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 15 treesize of output 11 [2021-01-06 10:53:28,805 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:28,824 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:28,825 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:53:28,826 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-01-06 10:53:29,224 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-01-06 10:53:29,592 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:29,593 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 32 treesize of output 77 [2021-01-06 10:53:29,598 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:29,647 INFO L625 ElimStorePlain]: treesize reduction 51, result has 46.9 percent of original size [2021-01-06 10:53:29,650 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:53:29,651 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:24 [2021-01-06 10:53:29,757 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 24 treesize of output 20 [2021-01-06 10:53:29,758 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:29,774 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:29,782 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 10:53:29,782 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:39 [2021-01-06 10:53:30,052 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:30,053 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-01-06 10:53:30,058 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 10:53:30,090 INFO L625 ElimStorePlain]: treesize reduction 17, result has 52.8 percent of original size [2021-01-06 10:53:30,093 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:53:30,094 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:43, output treesize:3 [2021-01-06 10:53:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:53:30,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247800270] [2021-01-06 10:53:30,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:53:30,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307953046] [2021-01-06 10:53:30,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:53:30,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-01-06 10:53:30,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731825573] [2021-01-06 10:53:30,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:53:30,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:30,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:53:30,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:53:30,148 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 20 states. [2021-01-06 10:53:30,884 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-01-06 10:53:31,232 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-01-06 10:53:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:53:32,398 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2021-01-06 10:53:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:53:32,399 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2021-01-06 10:53:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:53:32,404 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:53:32,404 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 10:53:32,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:53:32,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 10:53:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 53. [2021-01-06 10:53:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 10:53:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-01-06 10:53:32,431 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 29 [2021-01-06 10:53:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:53:32,432 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-01-06 10:53:32,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:53:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-01-06 10:53:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:53:32,434 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:32,434 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:32,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:53:32,648 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:32,650 INFO L82 PathProgramCache]: Analyzing trace with hash -212199577, now seen corresponding path program 2 times [2021-01-06 10:53:32,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:32,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576730858] [2021-01-06 10:53:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:32,667 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:53:32,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815093488] [2021-01-06 10:53:32,668 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 10:53:32,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:53:32,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:53:32,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:53:32,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:53:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:53:32,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576730858] [2021-01-06 10:53:32,821 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:53:32,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815093488] [2021-01-06 10:53:32,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:53:32,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:53:32,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854193151] [2021-01-06 10:53:32,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:53:32,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:32,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:53:32,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:53:32,824 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 7 states. [2021-01-06 10:53:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:53:32,985 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2021-01-06 10:53:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:53:32,986 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-01-06 10:53:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:53:32,987 INFO L225 Difference]: With dead ends: 161 [2021-01-06 10:53:32,987 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 10:53:32,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:53:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 10:53:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 78. [2021-01-06 10:53:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 10:53:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2021-01-06 10:53:33,003 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 31 [2021-01-06 10:53:33,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:53:33,004 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2021-01-06 10:53:33,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:53:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2021-01-06 10:53:33,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:53:33,005 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:33,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:33,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:53:33,221 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash -182444793, now seen corresponding path program 3 times [2021-01-06 10:53:33,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:33,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025602522] [2021-01-06 10:53:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:33,236 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:53:33,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610075072] [2021-01-06 10:53:33,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:53:33,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:53:33,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:53:33,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:53:33,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:53:33,534 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 24 treesize of output 20 [2021-01-06 10:53:33,535 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:33,545 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:33,547 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:53:33,547 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:33 [2021-01-06 10:53:33,672 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:33,673 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-01-06 10:53:33,675 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 10:53:33,693 INFO L625 ElimStorePlain]: treesize reduction 17, result has 43.3 percent of original size [2021-01-06 10:53:33,695 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:53:33,695 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:37, output treesize:3 [2021-01-06 10:53:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:53:33,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025602522] [2021-01-06 10:53:33,731 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:53:33,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610075072] [2021-01-06 10:53:33,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:53:33,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:53:33,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603708377] [2021-01-06 10:53:33,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:53:33,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:33,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:53:33,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:53:33,734 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 16 states. [2021-01-06 10:53:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:53:34,851 INFO L93 Difference]: Finished difference Result 213 states and 258 transitions. [2021-01-06 10:53:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:53:34,852 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2021-01-06 10:53:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:53:34,854 INFO L225 Difference]: With dead ends: 213 [2021-01-06 10:53:34,854 INFO L226 Difference]: Without dead ends: 173 [2021-01-06 10:53:34,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:53:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-01-06 10:53:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 120. [2021-01-06 10:53:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 10:53:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2021-01-06 10:53:34,884 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 31 [2021-01-06 10:53:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:53:34,884 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2021-01-06 10:53:34,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:53:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2021-01-06 10:53:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:53:34,886 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:34,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:35,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:53:35,100 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:35,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2049114485, now seen corresponding path program 1 times [2021-01-06 10:53:35,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:35,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424302994] [2021-01-06 10:53:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:35,120 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:53:35,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383263791] [2021-01-06 10:53:35,120 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 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 10:53:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:53:35,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:53:35,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:53:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:53:35,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424302994] [2021-01-06 10:53:35,238 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:53:35,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383263791] [2021-01-06 10:53:35,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:53:35,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:53:35,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169307712] [2021-01-06 10:53:35,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:53:35,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:35,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:53:35,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:53:35,246 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand 7 states. [2021-01-06 10:53:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:53:35,365 INFO L93 Difference]: Finished difference Result 166 states and 204 transitions. [2021-01-06 10:53:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:53:35,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-01-06 10:53:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:53:35,366 INFO L225 Difference]: With dead ends: 166 [2021-01-06 10:53:35,367 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 10:53:35,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:53:35,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 10:53:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 109. [2021-01-06 10:53:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 10:53:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2021-01-06 10:53:35,381 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 31 [2021-01-06 10:53:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:53:35,382 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2021-01-06 10:53:35,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:53:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2021-01-06 10:53:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 10:53:35,384 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:35,384 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:35,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:53:35,600 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:35,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1164461191, now seen corresponding path program 4 times [2021-01-06 10:53:35,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:35,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477272817] [2021-01-06 10:53:35,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:35,614 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:53:35,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725994472] [2021-01-06 10:53:35,615 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 10:53:35,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:53:35,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:53:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:53:35,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:53:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:53:35,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477272817] [2021-01-06 10:53:35,739 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:53:35,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725994472] [2021-01-06 10:53:35,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:53:35,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:53:35,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113415847] [2021-01-06 10:53:35,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:53:35,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:53:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:53:35,742 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand 7 states. [2021-01-06 10:53:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:53:35,895 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2021-01-06 10:53:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:53:35,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2021-01-06 10:53:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:53:35,897 INFO L225 Difference]: With dead ends: 136 [2021-01-06 10:53:35,897 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 10:53:35,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:53:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 10:53:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2021-01-06 10:53:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:53:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2021-01-06 10:53:35,910 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 34 [2021-01-06 10:53:35,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:53:35,911 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2021-01-06 10:53:35,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:53:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2021-01-06 10:53:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:53:35,912 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:35,913 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:36,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:53:36,126 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:36,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1661623630, now seen corresponding path program 5 times [2021-01-06 10:53:36,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:36,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641398214] [2021-01-06 10:53:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:36,148 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:53:36,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783659139] [2021-01-06 10:53:36,149 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 10:53:36,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 10:53:36,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:53:36,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:53:36,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:53:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:53:36,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641398214] [2021-01-06 10:53:36,274 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:53:36,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783659139] [2021-01-06 10:53:36,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:53:36,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:53:36,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028310610] [2021-01-06 10:53:36,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:53:36,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:36,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:53:36,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:53:36,276 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand 7 states. [2021-01-06 10:53:36,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:53:36,414 INFO L93 Difference]: Finished difference Result 135 states and 158 transitions. [2021-01-06 10:53:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:53:36,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2021-01-06 10:53:36,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:53:36,416 INFO L225 Difference]: With dead ends: 135 [2021-01-06 10:53:36,416 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 10:53:36,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:53:36,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 10:53:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 98. [2021-01-06 10:53:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 10:53:36,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2021-01-06 10:53:36,426 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 36 [2021-01-06 10:53:36,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:53:36,427 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2021-01-06 10:53:36,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:53:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2021-01-06 10:53:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 10:53:36,428 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:36,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:36,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:53:36,643 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:36,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2106982269, now seen corresponding path program 1 times [2021-01-06 10:53:36,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:36,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332503297] [2021-01-06 10:53:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:36,655 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:53:36,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210859714] [2021-01-06 10:53:36,655 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 10:53:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:53:36,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:53:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:53:36,798 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:36,799 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:53:36,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332503297] [2021-01-06 10:53:36,868 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:53:36,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210859714] [2021-01-06 10:53:36,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:53:36,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:53:36,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523683063] [2021-01-06 10:53:36,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:53:36,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:36,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:53:36,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:53:36,870 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand 9 states. [2021-01-06 10:53:37,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:53:37,260 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2021-01-06 10:53:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:53:37,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2021-01-06 10:53:37,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:53:37,261 INFO L225 Difference]: With dead ends: 135 [2021-01-06 10:53:37,262 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 10:53:37,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:53:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 10:53:37,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2021-01-06 10:53:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 10:53:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-01-06 10:53:37,271 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 38 [2021-01-06 10:53:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:53:37,271 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-01-06 10:53:37,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:53:37,271 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-01-06 10:53:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 10:53:37,272 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:37,272 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:37,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:53:37,487 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:37,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1024786640, now seen corresponding path program 1 times [2021-01-06 10:53:37,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:37,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699470587] [2021-01-06 10:53:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:37,499 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:53:37,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907452286] [2021-01-06 10:53:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:53:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:53:37,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:53:37,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:53:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 10:53:37,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699470587] [2021-01-06 10:53:37,654 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:53:37,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907452286] [2021-01-06 10:53:37,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:53:37,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:53:37,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373987314] [2021-01-06 10:53:37,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:53:37,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:37,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:53:37,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:53:37,657 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 7 states. [2021-01-06 10:53:37,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:53:37,769 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2021-01-06 10:53:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:53:37,769 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2021-01-06 10:53:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:53:37,770 INFO L225 Difference]: With dead ends: 88 [2021-01-06 10:53:37,770 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 10:53:37,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:53:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 10:53:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-01-06 10:53:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:53:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-01-06 10:53:37,776 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 43 [2021-01-06 10:53:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:53:37,777 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-01-06 10:53:37,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:53:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-01-06 10:53:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:53:37,778 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:53:37,778 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:53:37,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:53:37,993 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:53:37,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:53:37,994 INFO L82 PathProgramCache]: Analyzing trace with hash -451868680, now seen corresponding path program 6 times [2021-01-06 10:53:37,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:53:37,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596065338] [2021-01-06 10:53:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:53:38,005 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:53:38,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167641270] [2021-01-06 10:53:38,006 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 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 10:53:38,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:53:38,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:53:38,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 10:53:38,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:53:38,317 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-01-06 10:53:38,318 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:38,325 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:38,326 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:53:38,329 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:15 [2021-01-06 10:53:38,373 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 17 treesize of output 13 [2021-01-06 10:53:38,376 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:38,385 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:38,387 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:53:38,387 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-01-06 10:53:38,430 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:38,431 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 34 treesize of output 85 [2021-01-06 10:53:38,434 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:38,474 INFO L625 ElimStorePlain]: treesize reduction 26, result has 64.4 percent of original size [2021-01-06 10:53:38,475 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:53:38,476 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2021-01-06 10:53:38,757 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:38,758 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 54 treesize of output 208 [2021-01-06 10:53:38,762 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:38,841 INFO L625 ElimStorePlain]: treesize reduction 79, result has 48.7 percent of original size [2021-01-06 10:53:38,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:53:38,843 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:75 [2021-01-06 10:53:39,027 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:39,028 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 323 [2021-01-06 10:53:39,038 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:39,127 INFO L625 ElimStorePlain]: treesize reduction 105, result has 45.6 percent of original size [2021-01-06 10:53:39,129 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:53:39,129 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:88 [2021-01-06 10:53:39,748 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-01-06 10:53:40,027 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-01-06 10:53:40,479 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-01-06 10:53:40,480 INFO L348 Elim1Store]: treesize reduction 17, result has 94.4 percent of original size [2021-01-06 10:53:40,481 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 315 [2021-01-06 10:53:40,492 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:40,680 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-01-06 10:53:40,681 INFO L625 ElimStorePlain]: treesize reduction 82, result has 66.3 percent of original size [2021-01-06 10:53:40,685 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:40,687 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:53:40,687 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:161 [2021-01-06 10:53:40,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:40,840 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:41,261 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-01-06 10:53:41,276 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 10, 1] term [2021-01-06 10:53:41,277 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 10:53:41,314 INFO L443 ElimStorePlain]: Different costs {12=[v_prenex_1], 20=[|v_#memory_int_20|, v_prenex_3]} [2021-01-06 10:53:41,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:53:41,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,346 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2021-01-06 10:53:41,357 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:41,549 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-01-06 10:53:41,550 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:41,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,621 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:41,621 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2021-01-06 10:53:41,625 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:41,899 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-01-06 10:53:41,900 INFO L625 ElimStorePlain]: treesize reduction 64, result has 79.4 percent of original size [2021-01-06 10:53:41,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:53:41,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:53:41,946 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:53:41,947 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 140 [2021-01-06 10:53:41,950 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:42,163 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-01-06 10:53:42,165 INFO L625 ElimStorePlain]: treesize reduction 12, result has 95.1 percent of original size [2021-01-06 10:53:42,172 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 3 xjuncts. [2021-01-06 10:53:42,173 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:284, output treesize:224 [2021-01-06 10:53:43,065 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-01-06 10:53:43,486 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-01-06 10:53:43,498 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 10:53:43,865 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-01-06 10:53:43,907 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 10:53:46,334 WARN L197 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 120 [2021-01-06 10:53:46,838 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-01-06 10:53:47,381 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 84 [2021-01-06 10:53:48,129 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-01-06 10:53:48,512 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2021-01-06 10:53:48,513 INFO L348 Elim1Store]: treesize reduction 40, result has 88.9 percent of original size [2021-01-06 10:53:48,514 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 86 treesize of output 342 [2021-01-06 10:53:48,522 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[10, 2, 1] term [2021-01-06 10:53:48,522 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 10:53:48,523 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 2, 1] term [2021-01-06 10:53:48,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 10:53:48,525 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 2, 1] term [2021-01-06 10:53:48,525 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 10:53:48,526 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 2, 1] term [2021-01-06 10:53:48,526 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:53:48,528 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2021-01-06 10:53:48,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:53:48,529 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2021-01-06 10:53:48,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:48,530 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:53:48,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:48,531 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:53:48,531 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:48,532 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:53:48,532 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:48,535 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:48,537 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:48,538 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:48,539 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:48,540 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:48,541 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:48,541 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:48,542 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:48,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:53:48,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:53:48,551 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:48,552 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:48,552 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:48,553 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:48,558 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:53:48,558 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:48,559 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:53:48,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:48,561 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:53:48,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:48,562 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:53:48,562 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:48,563 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:53:48,564 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:48,564 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:48,565 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:48,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:48,568 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:53:48,570 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2021-01-06 10:53:48,570 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:48,571 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:53:48,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:48,572 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:53:48,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:48,573 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:53:48,573 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:48,663 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:49,160 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 63 [2021-01-06 10:53:49,164 INFO L625 ElimStorePlain]: treesize reduction 2908, result has 5.0 percent of original size [2021-01-06 10:53:49,544 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 100 [2021-01-06 10:53:49,546 INFO L348 Elim1Store]: treesize reduction 68, result has 84.3 percent of original size [2021-01-06 10:53:49,547 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 98 treesize of output 386 [2021-01-06 10:53:49,558 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[10, 2, 1] term [2021-01-06 10:53:49,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 10:53:49,560 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 2, 1] term [2021-01-06 10:53:49,560 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 10:53:49,561 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 2, 1] term [2021-01-06 10:53:49,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 10:53:49,562 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 2, 1] term [2021-01-06 10:53:49,562 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:53:49,563 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2021-01-06 10:53:49,563 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:53:49,564 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2021-01-06 10:53:49,564 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:49,564 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:53:49,565 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:49,565 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:53:49,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:49,566 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:53:49,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:49,570 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:49,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:49,573 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:49,573 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:49,575 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:49,576 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:49,577 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:49,577 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:49,578 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:49,579 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:49,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:49,581 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:49,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:49,586 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:53:49,586 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:49,588 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:49,589 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:53:49,589 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:49,594 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 10:53:49,595 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 2, 1] term [2021-01-06 10:53:49,596 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 10:53:49,596 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 2, 1] term [2021-01-06 10:53:49,597 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 10:53:49,597 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 2, 1] term [2021-01-06 10:53:49,598 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:53:49,598 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2021-01-06 10:53:49,599 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:53:49,600 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2021-01-06 10:53:49,600 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:49,600 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:53:49,601 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:49,601 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:53:49,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:49,602 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:53:49,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:49,606 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 10:53:49,607 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 10:53:49,609 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 2, 1] term [2021-01-06 10:53:49,609 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 10:53:49,610 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 2, 1] term [2021-01-06 10:53:49,610 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:53:49,611 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2021-01-06 10:53:49,612 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:53:49,612 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2021-01-06 10:53:49,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:49,613 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:53:49,614 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:49,614 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:53:49,615 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:49,615 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:53:49,615 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:49,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 10:53:49,620 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 10:53:49,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 10:53:49,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:53:49,622 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:53:49,623 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2021-01-06 10:53:49,623 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:53:49,624 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:53:49,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:53:49,625 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:53:49,625 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:53:49,626 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:53:49,626 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:53:49,732 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:53:50,245 WARN L197 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 35 [2021-01-06 10:53:50,246 INFO L625 ElimStorePlain]: treesize reduction 3365, result has 1.9 percent of original size [2021-01-06 10:53:50,252 INFO L547 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-01-06 10:53:50,252 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:236, output treesize:43 [2021-01-06 10:53:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:53:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596065338] [2021-01-06 10:53:50,800 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:53:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167641270] [2021-01-06 10:53:50,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:53:50,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-01-06 10:53:50,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046538290] [2021-01-06 10:53:50,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:53:50,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:53:50,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:53:50,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:53:50,803 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 41 states. [2021-01-06 10:53:53,688 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-01-06 10:53:54,008 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-01-06 10:53:54,399 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-01-06 10:53:54,753 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-01-06 10:53:55,072 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-01-06 10:53:55,544 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-01-06 10:53:55,985 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-01-06 10:53:56,398 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-01-06 10:53:56,613 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-01-06 10:53:56,968 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2021-01-06 10:53:57,283 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-01-06 10:53:57,677 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-01-06 10:53:57,948 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-01-06 10:53:58,342 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-01-06 10:53:58,914 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2021-01-06 10:53:59,469 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 102 [2021-01-06 10:54:00,345 WARN L197 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 113 [2021-01-06 10:54:01,020 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 124 [2021-01-06 10:54:01,509 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2021-01-06 10:54:01,958 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-01-06 10:54:02,378 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-01-06 10:54:02,806 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 62 [2021-01-06 10:54:03,205 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 62 [2021-01-06 10:54:03,577 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-01-06 10:54:03,935 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 62 [2021-01-06 10:54:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:54:03,944 INFO L93 Difference]: Finished difference Result 161 states and 191 transitions. [2021-01-06 10:54:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 10:54:03,945 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 47 [2021-01-06 10:54:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:54:03,946 INFO L225 Difference]: With dead ends: 161 [2021-01-06 10:54:03,947 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 10:54:03,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2069 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=684, Invalid=6122, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 10:54:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 10:54:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 83. [2021-01-06 10:54:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:54:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2021-01-06 10:54:03,963 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 47 [2021-01-06 10:54:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:54:03,964 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2021-01-06 10:54:03,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:54:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2021-01-06 10:54:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:54:03,966 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:54:03,966 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:54:04,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:54:04,167 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:54:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:54:04,169 INFO L82 PathProgramCache]: Analyzing trace with hash -585882186, now seen corresponding path program 1 times [2021-01-06 10:54:04,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:54:04,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407809323] [2021-01-06 10:54:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:54:04,178 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:54:04,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199579105] [2021-01-06 10:54:04,178 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 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 10:54:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:54:04,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:54:04,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:54:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 10:54:04,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407809323] [2021-01-06 10:54:04,289 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:54:04,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199579105] [2021-01-06 10:54:04,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:54:04,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:54:04,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299012379] [2021-01-06 10:54:04,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:54:04,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:54:04,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:54:04,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:54:04,295 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 3 states. [2021-01-06 10:54:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:54:04,329 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2021-01-06 10:54:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:54:04,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2021-01-06 10:54:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:54:04,332 INFO L225 Difference]: With dead ends: 137 [2021-01-06 10:54:04,332 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:54:04,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:54:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:54:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2021-01-06 10:54:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 10:54:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2021-01-06 10:54:04,346 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 47 [2021-01-06 10:54:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:54:04,346 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2021-01-06 10:54:04,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:54:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2021-01-06 10:54:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:54:04,347 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:54:04,347 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:54:04,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:54:04,563 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:54:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:54:04,564 INFO L82 PathProgramCache]: Analyzing trace with hash -367027468, now seen corresponding path program 2 times [2021-01-06 10:54:04,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:54:04,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151986290] [2021-01-06 10:54:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:54:04,574 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:54:04,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085784920] [2021-01-06 10:54:04,574 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 10:54:04,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:54:04,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:54:04,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 10:54:04,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:54:04,758 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-01-06 10:54:04,760 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:54:04,767 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:54:04,768 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:54:04,768 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:10 [2021-01-06 10:54:04,805 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 20 treesize of output 16 [2021-01-06 10:54:04,806 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:54:04,818 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:54:04,819 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:54:04,820 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2021-01-06 10:54:04,892 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:54:04,892 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 34 treesize of output 85 [2021-01-06 10:54:04,894 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:54:04,937 INFO L625 ElimStorePlain]: treesize reduction 26, result has 61.8 percent of original size [2021-01-06 10:54:04,937 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:54:04,938 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2021-01-06 10:54:05,207 INFO L348 Elim1Store]: treesize reduction 25, result has 85.8 percent of original size [2021-01-06 10:54:05,208 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 52 treesize of output 173 [2021-01-06 10:54:05,211 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:54:05,285 INFO L625 ElimStorePlain]: treesize reduction 73, result has 46.3 percent of original size [2021-01-06 10:54:05,286 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:54:05,286 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:63 [2021-01-06 10:54:05,481 INFO L348 Elim1Store]: treesize reduction 74, result has 53.8 percent of original size [2021-01-06 10:54:05,482 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 107 [2021-01-06 10:54:05,486 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:54:05,546 INFO L625 ElimStorePlain]: treesize reduction 46, result has 51.6 percent of original size [2021-01-06 10:54:05,547 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:54:05,547 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2021-01-06 10:54:06,347 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-01-06 10:54:06,348 INFO L348 Elim1Store]: treesize reduction 231, result has 37.4 percent of original size [2021-01-06 10:54:06,349 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 73 treesize of output 166 [2021-01-06 10:54:06,359 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:54:06,449 INFO L625 ElimStorePlain]: treesize reduction 141, result has 30.5 percent of original size [2021-01-06 10:54:06,449 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:54:06,449 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:95, output treesize:62 [2021-01-06 10:54:06,900 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2021-01-06 10:54:06,901 INFO L348 Elim1Store]: treesize reduction 263, result has 36.9 percent of original size [2021-01-06 10:54:06,902 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 81 treesize of output 186 [2021-01-06 10:54:06,908 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:54:07,009 INFO L625 ElimStorePlain]: treesize reduction 159, result has 28.1 percent of original size [2021-01-06 10:54:07,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:54:07,012 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:54:07,013 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:103, output treesize:52 [2021-01-06 10:54:07,896 INFO L348 Elim1Store]: treesize reduction 27, result has 67.1 percent of original size [2021-01-06 10:54:07,897 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 70 [2021-01-06 10:54:07,899 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:54:07,906 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:54:07,908 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:54:07,908 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:3 [2021-01-06 10:54:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:54:07,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151986290] [2021-01-06 10:54:07,990 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:54:07,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085784920] [2021-01-06 10:54:07,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:54:07,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-01-06 10:54:07,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022470257] [2021-01-06 10:54:07,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:54:07,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:54:07,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:54:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:54:07,994 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand 32 states. [2021-01-06 10:54:09,753 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-01-06 10:54:09,950 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-01-06 10:54:10,162 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-01-06 10:54:10,346 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-01-06 10:54:10,586 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-01-06 10:54:10,814 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-01-06 10:54:11,055 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-01-06 10:54:11,299 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-01-06 10:54:11,525 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-01-06 10:54:11,726 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-01-06 10:54:11,956 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-01-06 10:54:12,217 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-01-06 10:54:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:54:12,229 INFO L93 Difference]: Finished difference Result 192 states and 226 transitions. [2021-01-06 10:54:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 10:54:12,229 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 47 [2021-01-06 10:54:12,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:54:12,231 INFO L225 Difference]: With dead ends: 192 [2021-01-06 10:54:12,231 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 10:54:12,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=736, Invalid=3296, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 10:54:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 10:54:12,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2021-01-06 10:54:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 10:54:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2021-01-06 10:54:12,249 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 47 [2021-01-06 10:54:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:54:12,249 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2021-01-06 10:54:12,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:54:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2021-01-06 10:54:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:54:12,250 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:54:12,250 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:54:12,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:54:12,465 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:54:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:54:12,466 INFO L82 PathProgramCache]: Analyzing trace with hash -293846086, now seen corresponding path program 7 times [2021-01-06 10:54:12,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:54:12,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963284518] [2021-01-06 10:54:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:54:12,475 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:54:12,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305843884] [2021-01-06 10:54:12,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:54:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:54:12,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:54:12,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:54:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 10:54:12,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963284518] [2021-01-06 10:54:12,659 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:54:12,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305843884] [2021-01-06 10:54:12,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:54:12,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:54:12,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185640672] [2021-01-06 10:54:12,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:54:12,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:54:12,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:54:12,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:54:12,661 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand 9 states. [2021-01-06 10:54:12,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:54:12,906 INFO L93 Difference]: Finished difference Result 295 states and 354 transitions. [2021-01-06 10:54:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:54:12,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2021-01-06 10:54:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:54:12,908 INFO L225 Difference]: With dead ends: 295 [2021-01-06 10:54:12,908 INFO L226 Difference]: Without dead ends: 199 [2021-01-06 10:54:12,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:54:12,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-01-06 10:54:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 144. [2021-01-06 10:54:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 10:54:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 169 transitions. [2021-01-06 10:54:12,926 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 169 transitions. Word has length 49 [2021-01-06 10:54:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:54:12,927 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 169 transitions. [2021-01-06 10:54:12,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:54:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 169 transitions. [2021-01-06 10:54:12,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:54:12,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:54:12,928 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:54:13,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:54:13,144 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:54:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:54:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1949544298, now seen corresponding path program 3 times [2021-01-06 10:54:13,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:54:13,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421839118] [2021-01-06 10:54:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:54:13,154 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:54:13,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301905568] [2021-01-06 10:54:13,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true