/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/array20_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:02:07,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:02:07,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:02:07,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:02:07,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:02:07,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:02:07,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:02:07,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:02:07,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:02:07,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:02:07,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:02:07,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:02:07,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:02:07,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:02:07,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:02:07,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:02:07,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:02:07,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:02:07,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:02:07,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:02:07,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:02:07,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:02:07,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:02:07,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:02:07,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 01:02:07,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 01:02:07,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 01:02:07,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 01:02:07,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 01:02:07,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 01:02:07,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 01:02:07,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 01:02:07,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 01:02:07,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 01:02:07,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 01:02:07,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 01:02:07,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 01:02:07,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 01:02:07,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:02:07,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:02:07,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:02:07,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:02:07,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:02:07,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:02:07,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:02:07,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:02:07,254 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:02:07,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:02:07,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:02:07,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:02:07,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:02:07,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:02:07,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:02:07,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:02:07,257 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:02:07,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:02:07,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:02:07,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:02:07,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:02:07,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:02:07,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:02:07,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:02:07,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:02:07,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:02:07,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:02:07,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:02:07,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:02:07,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:02:07,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:02:07,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:02:07,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:02:07,822 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:02:07,822 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:02:07,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array20_pattern.c [2020-12-23 01:02:07,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/664f54333/1ee203656df543fca6a8b8874ce8a7ae/FLAG5cf9b8c19 [2020-12-23 01:02:08,628 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:02:08,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-patterns/array20_pattern.c [2020-12-23 01:02:08,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/664f54333/1ee203656df543fca6a8b8874ce8a7ae/FLAG5cf9b8c19 [2020-12-23 01:02:08,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/664f54333/1ee203656df543fca6a8b8874ce8a7ae [2020-12-23 01:02:08,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:02:08,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:02:08,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:02:08,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:02:08,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:02:08,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:02:08" (1/1) ... [2020-12-23 01:02:08,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44d97c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:08, skipping insertion in model container [2020-12-23 01:02:08,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:02:08" (1/1) ... [2020-12-23 01:02:08,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:02:09,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:02:09,203 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/array20_pattern.c[1444,1457] 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,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMINUS,IdentifierExpression[~ARR_SIZE~0,GLOBAL],IntegerLiteral[1]],IdentifierExpression[~index1~0,]]]],[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,] [2020-12-23 01:02:09,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:02:09,275 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:02:09,296 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/array20_pattern.c[1444,1457] 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,BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMINUS,IdentifierExpression[~ARR_SIZE~0,GLOBAL],IntegerLiteral[1]],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: 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,] [2020-12-23 01:02:09,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:02:09,373 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:02:09,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09 WrapperNode [2020-12-23 01:02:09,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:02:09,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:02:09,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:02:09,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:02:09,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09" (1/1) ... [2020-12-23 01:02:09,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09" (1/1) ... [2020-12-23 01:02:09,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:02:09,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:02:09,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:02:09,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:02:09,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09" (1/1) ... [2020-12-23 01:02:09,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09" (1/1) ... [2020-12-23 01:02:09,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09" (1/1) ... [2020-12-23 01:02:09,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09" (1/1) ... [2020-12-23 01:02:09,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09" (1/1) ... [2020-12-23 01:02:09,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09" (1/1) ... [2020-12-23 01:02:09,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09" (1/1) ... [2020-12-23 01:02:09,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:02:09,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:02:09,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:02:09,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:02:09,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:02:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:02:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:02:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:02:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:02:09,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:02:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:02:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 01:02:10,174 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:02:10,174 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 01:02:10,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:02:10 BoogieIcfgContainer [2020-12-23 01:02:10,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:02:10,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:02:10,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:02:10,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:02:10,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:02:08" (1/3) ... [2020-12-23 01:02:10,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cf2ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:02:10, skipping insertion in model container [2020-12-23 01:02:10,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:09" (2/3) ... [2020-12-23 01:02:10,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cf2ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:02:10, skipping insertion in model container [2020-12-23 01:02:10,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:02:10" (3/3) ... [2020-12-23 01:02:10,188 INFO L111 eAbstractionObserver]: Analyzing ICFG array20_pattern.c [2020-12-23 01:02:10,196 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:02:10,201 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:02:10,227 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:02:10,259 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:02:10,259 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:02:10,259 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:02:10,259 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:02:10,259 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:02:10,260 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:02:10,260 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:02:10,260 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:02:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-23 01:02:10,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:02:10,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:10,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:02:10,283 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:10,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1763201290, now seen corresponding path program 1 times [2020-12-23 01:02:10,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:10,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852768904] [2020-12-23 01:02:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:02:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:02:10,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852768904] [2020-12-23 01:02:10,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:02:10,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:02:10,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880230641] [2020-12-23 01:02:10,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:02:10,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:10,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:02:10,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:02:10,486 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-23 01:02:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:10,507 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-12-23 01:02:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:02:10,508 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 01:02:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:10,518 INFO L225 Difference]: With dead ends: 57 [2020-12-23 01:02:10,518 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 01:02:10,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:02:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 01:02:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 01:02:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 01:02:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-23 01:02:10,563 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 11 [2020-12-23 01:02:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:10,563 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-23 01:02:10,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:02:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-23 01:02:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:02:10,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:10,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:02:10,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:02:10,566 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:10,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash -204009896, now seen corresponding path program 1 times [2020-12-23 01:02:10,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:10,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628799614] [2020-12-23 01:02:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:10,591 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:10,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759224035] [2020-12-23 01:02:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:02:10,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:02:10,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:02:10,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628799614] [2020-12-23 01:02:10,815 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:10,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759224035] [2020-12-23 01:02:10,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:02:10,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 01:02:10,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256600857] [2020-12-23 01:02:10,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:02:10,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:10,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:02:10,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:02:10,820 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2020-12-23 01:02:10,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:10,981 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-23 01:02:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:02:10,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-23 01:02:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:10,988 INFO L225 Difference]: With dead ends: 53 [2020-12-23 01:02:10,989 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 01:02:10,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:02:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 01:02:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-23 01:02:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 01:02:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-23 01:02:11,015 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2020-12-23 01:02:11,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:11,016 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-23 01:02:11,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:02:11,016 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-23 01:02:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 01:02:11,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:11,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:02:11,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 01:02:11,237 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1717183807, now seen corresponding path program 1 times [2020-12-23 01:02:11,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:11,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496190542] [2020-12-23 01:02:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:11,256 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:11,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037961211] [2020-12-23 01:02:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:02:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:02:11,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:02:11,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496190542] [2020-12-23 01:02:11,415 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:11,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037961211] [2020-12-23 01:02:11,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:02:11,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:02:11,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353802594] [2020-12-23 01:02:11,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:02:11,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:11,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:02:11,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:02:11,418 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-12-23 01:02:11,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:11,507 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-12-23 01:02:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:02:11,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-23 01:02:11,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:11,508 INFO L225 Difference]: With dead ends: 55 [2020-12-23 01:02:11,509 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 01:02:11,509 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 [2020-12-23 01:02:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 01:02:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-12-23 01:02:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 01:02:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-23 01:02:11,534 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2020-12-23 01:02:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:11,539 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-23 01:02:11,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:02:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-23 01:02:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:02:11,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:11,543 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] [2020-12-23 01:02:11,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:11,757 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:11,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash 817488613, now seen corresponding path program 1 times [2020-12-23 01:02:11,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:11,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150681308] [2020-12-23 01:02:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:11,804 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:11,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668004026] [2020-12-23 01:02:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:02:11,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 01:02:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:12,013 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 [2020-12-23 01:02:12,016 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:12,029 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:02:12,030 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:02:12,031 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-23 01:02:12,275 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:02:12,276 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 28 treesize of output 61 [2020-12-23 01:02:12,283 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:12,331 INFO L625 ElimStorePlain]: treesize reduction 20, result has 72.6 percent of original size [2020-12-23 01:02:12,335 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:02:12,336 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:37 [2020-12-23 01:02:12,430 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:02:12,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:02:12,478 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 28 treesize of output 24 [2020-12-23 01:02:12,479 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:12,506 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:02:12,507 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 33 treesize of output 76 [2020-12-23 01:02:12,512 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:12,611 INFO L625 ElimStorePlain]: treesize reduction 48, result has 63.9 percent of original size [2020-12-23 01:02:12,621 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2020-12-23 01:02:12,622 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:93, output treesize:85 [2020-12-23 01:02:13,072 INFO L443 ElimStorePlain]: Different costs {2=[|#memory_int|], 6=[v_prenex_2]} [2020-12-23 01:02:13,085 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:02:13,086 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 36 treesize of output 36 [2020-12-23 01:02:13,089 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 01:02:13,172 INFO L625 ElimStorePlain]: treesize reduction 20, result has 78.9 percent of original size [2020-12-23 01:02:13,202 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:02:13,202 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 70 [2020-12-23 01:02:13,209 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:13,288 INFO L625 ElimStorePlain]: treesize reduction 31, result has 66.7 percent of original size [2020-12-23 01:02:13,301 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-2 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2020-12-23 01:02:13,301 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:107, output treesize:62 [2020-12-23 01:02:13,429 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-23 01:02:13,429 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:02:13,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:02:13,530 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-23 01:02:13,531 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:02:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:02:13,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150681308] [2020-12-23 01:02:13,575 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:13,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668004026] [2020-12-23 01:02:13,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:02:13,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-23 01:02:13,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472932268] [2020-12-23 01:02:13,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:02:13,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:13,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:02:13,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:02:13,579 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 20 states. [2020-12-23 01:02:15,120 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-23 01:02:15,379 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-12-23 01:02:15,918 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-23 01:02:16,741 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-23 01:02:17,002 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-23 01:02:17,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:17,226 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2020-12-23 01:02:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 01:02:17,227 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-12-23 01:02:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:17,232 INFO L225 Difference]: With dead ends: 125 [2020-12-23 01:02:17,232 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 01:02:17,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=495, Invalid=2055, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 01:02:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 01:02:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 53. [2020-12-23 01:02:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 01:02:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2020-12-23 01:02:17,251 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 29 [2020-12-23 01:02:17,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:17,251 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2020-12-23 01:02:17,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:02:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2020-12-23 01:02:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:02:17,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:17,253 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] [2020-12-23 01:02:17,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:17,467 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:17,468 INFO L82 PathProgramCache]: Analyzing trace with hash 230682599, now seen corresponding path program 1 times [2020-12-23 01:02:17,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:17,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423356800] [2020-12-23 01:02:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:17,486 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:17,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497169240] [2020-12-23 01:02:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:02:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 01:02:17,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 01:02:17,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423356800] [2020-12-23 01:02:17,583 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:17,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497169240] [2020-12-23 01:02:17,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:02:17,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:02:17,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234417501] [2020-12-23 01:02:17,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:02:17,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:17,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:02:17,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:02:17,586 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand 3 states. [2020-12-23 01:02:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:17,643 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-12-23 01:02:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:02:17,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-12-23 01:02:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:17,645 INFO L225 Difference]: With dead ends: 91 [2020-12-23 01:02:17,645 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 01:02:17,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:02:17,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 01:02:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-12-23 01:02:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 01:02:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-12-23 01:02:17,658 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 29 [2020-12-23 01:02:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:17,658 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-12-23 01:02:17,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:02:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-12-23 01:02:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:02:17,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:17,660 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] [2020-12-23 01:02:17,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:17,874 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:17,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1049181079, now seen corresponding path program 1 times [2020-12-23 01:02:17,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:17,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558573509] [2020-12-23 01:02:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:17,908 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:17,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367629182] [2020-12-23 01:02:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:02:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:02:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 01:02:18,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558573509] [2020-12-23 01:02:18,217 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:18,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367629182] [2020-12-23 01:02:18,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:02:18,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 01:02:18,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618152321] [2020-12-23 01:02:18,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:02:18,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:18,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:02:18,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:02:18,219 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 9 states. [2020-12-23 01:02:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:18,622 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2020-12-23 01:02:18,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:02:18,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-23 01:02:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:18,624 INFO L225 Difference]: With dead ends: 128 [2020-12-23 01:02:18,624 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 01:02:18,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:02:18,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 01:02:18,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-12-23 01:02:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 01:02:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-12-23 01:02:18,639 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 29 [2020-12-23 01:02:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:18,639 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-12-23 01:02:18,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:02:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-12-23 01:02:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:02:18,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:18,641 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] [2020-12-23 01:02:18,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 01:02:18,855 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:18,856 INFO L82 PathProgramCache]: Analyzing trace with hash -212199577, now seen corresponding path program 2 times [2020-12-23 01:02:18,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:18,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079037560] [2020-12-23 01:02:18,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:18,876 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:18,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455285970] [2020-12-23 01:02:18,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:18,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:02:18,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:02:18,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:02:18,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:02:19,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079037560] [2020-12-23 01:02:19,020 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:19,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455285970] [2020-12-23 01:02:19,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:02:19,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:02:19,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470016730] [2020-12-23 01:02:19,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:02:19,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:19,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:02:19,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:02:19,028 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 7 states. [2020-12-23 01:02:19,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:19,215 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2020-12-23 01:02:19,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:02:19,216 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-23 01:02:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:19,217 INFO L225 Difference]: With dead ends: 163 [2020-12-23 01:02:19,218 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 01:02:19,218 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 [2020-12-23 01:02:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 01:02:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 80. [2020-12-23 01:02:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 01:02:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2020-12-23 01:02:19,234 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 31 [2020-12-23 01:02:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:19,234 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2020-12-23 01:02:19,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:02:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2020-12-23 01:02:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:02:19,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:19,236 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] [2020-12-23 01:02:19,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:19,450 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:19,451 INFO L82 PathProgramCache]: Analyzing trace with hash -182444793, now seen corresponding path program 3 times [2020-12-23 01:02:19,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:19,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806289263] [2020-12-23 01:02:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:19,465 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:19,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094356325] [2020-12-23 01:02:19,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:19,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 01:02:19,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:02:19,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 01:02:19,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:19,835 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 [2020-12-23 01:02:19,836 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:19,846 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:02:19,853 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:02:19,854 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:33 [2020-12-23 01:02:20,002 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:02:20,003 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 24 treesize of output 24 [2020-12-23 01:02:20,005 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 01:02:20,023 INFO L625 ElimStorePlain]: treesize reduction 13, result has 56.7 percent of original size [2020-12-23 01:02:20,027 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:02:20,027 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:37, output treesize:3 [2020-12-23 01:02:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 01:02:20,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806289263] [2020-12-23 01:02:20,064 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:20,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094356325] [2020-12-23 01:02:20,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:02:20,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 01:02:20,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581929377] [2020-12-23 01:02:20,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:02:20,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:20,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:02:20,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:02:20,066 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand 16 states. [2020-12-23 01:02:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:21,205 INFO L93 Difference]: Finished difference Result 165 states and 192 transitions. [2020-12-23 01:02:21,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:02:21,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-12-23 01:02:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:21,207 INFO L225 Difference]: With dead ends: 165 [2020-12-23 01:02:21,207 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 01:02:21,208 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 [2020-12-23 01:02:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 01:02:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2020-12-23 01:02:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 01:02:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2020-12-23 01:02:21,233 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 31 [2020-12-23 01:02:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:21,234 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2020-12-23 01:02:21,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:02:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2020-12-23 01:02:21,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:02:21,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:21,236 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] [2020-12-23 01:02:21,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:21,442 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:21,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2049114485, now seen corresponding path program 2 times [2020-12-23 01:02:21,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:21,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355606084] [2020-12-23 01:02:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:21,466 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:21,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892795275] [2020-12-23 01:02:21,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:21,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:02:21,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:02:21,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:02:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:02:21,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355606084] [2020-12-23 01:02:21,646 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:21,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892795275] [2020-12-23 01:02:21,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:02:21,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:02:21,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550368419] [2020-12-23 01:02:21,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:02:21,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:21,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:02:21,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:02:21,648 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand 7 states. [2020-12-23 01:02:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:21,792 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2020-12-23 01:02:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:02:21,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-23 01:02:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:21,794 INFO L225 Difference]: With dead ends: 140 [2020-12-23 01:02:21,794 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 01:02:21,795 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 [2020-12-23 01:02:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 01:02:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-12-23 01:02:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 01:02:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2020-12-23 01:02:21,808 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 31 [2020-12-23 01:02:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:21,808 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2020-12-23 01:02:21,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:02:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2020-12-23 01:02:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 01:02:21,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:21,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:02:22,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 01:02:22,019 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:22,020 INFO L82 PathProgramCache]: Analyzing trace with hash 924471561, now seen corresponding path program 4 times [2020-12-23 01:02:22,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:22,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039418129] [2020-12-23 01:02:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:22,038 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:22,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312678003] [2020-12-23 01:02:22,038 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:22,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:02:22,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:02:22,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:02:22,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 01:02:22,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039418129] [2020-12-23 01:02:22,172 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:22,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312678003] [2020-12-23 01:02:22,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:02:22,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:02:22,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403632878] [2020-12-23 01:02:22,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:02:22,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:22,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:02:22,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:02:22,179 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand 7 states. [2020-12-23 01:02:22,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:22,291 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2020-12-23 01:02:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:02:22,292 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-12-23 01:02:22,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:22,293 INFO L225 Difference]: With dead ends: 138 [2020-12-23 01:02:22,293 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 01:02:22,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:02:22,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 01:02:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2020-12-23 01:02:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 01:02:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2020-12-23 01:02:22,307 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 33 [2020-12-23 01:02:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:22,307 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2020-12-23 01:02:22,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:02:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2020-12-23 01:02:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 01:02:22,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:22,309 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] [2020-12-23 01:02:22,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:22,524 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:22,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1164461191, now seen corresponding path program 5 times [2020-12-23 01:02:22,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:22,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464321900] [2020-12-23 01:02:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:22,546 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:22,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816185510] [2020-12-23 01:02:22,547 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:22,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 01:02:22,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:02:22,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:02:22,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 01:02:22,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464321900] [2020-12-23 01:02:22,714 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:22,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816185510] [2020-12-23 01:02:22,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:02:22,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:02:22,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276458951] [2020-12-23 01:02:22,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:02:22,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:22,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:02:22,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:02:22,716 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand 7 states. [2020-12-23 01:02:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:22,895 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-12-23 01:02:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:02:22,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-23 01:02:22,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:22,897 INFO L225 Difference]: With dead ends: 112 [2020-12-23 01:02:22,897 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 01:02:22,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:02:22,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 01:02:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-23 01:02:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 01:02:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-12-23 01:02:22,905 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 34 [2020-12-23 01:02:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:22,905 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-12-23 01:02:22,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:02:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-12-23 01:02:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 01:02:22,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:22,907 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] [2020-12-23 01:02:23,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:23,123 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:23,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash -451868680, now seen corresponding path program 6 times [2020-12-23 01:02:23,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:23,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49710482] [2020-12-23 01:02:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:23,137 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:23,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112710810] [2020-12-23 01:02:23,138 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 [2020-12-23 01:02:23,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 01:02:23,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:02:23,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 01:02:23,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:23,392 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 [2020-12-23 01:02:23,394 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:23,401 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:02:23,402 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:02:23,403 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:15 [2020-12-23 01:02:23,436 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 [2020-12-23 01:02:23,437 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:23,448 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:02:23,450 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:02:23,450 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 01:02:23,497 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:02:23,498 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 [2020-12-23 01:02:23,501 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:23,547 INFO L625 ElimStorePlain]: treesize reduction 26, result has 64.4 percent of original size [2020-12-23 01:02:23,548 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:02:23,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2020-12-23 01:02:23,833 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:02:23,834 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 [2020-12-23 01:02:23,838 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:23,912 INFO L625 ElimStorePlain]: treesize reduction 79, result has 48.7 percent of original size [2020-12-23 01:02:23,914 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:02:23,914 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:75 [2020-12-23 01:02:24,149 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-23 01:02:24,150 INFO L348 Elim1Store]: treesize reduction 95, result has 66.8 percent of original size [2020-12-23 01:02:24,150 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 65 treesize of output 214 [2020-12-23 01:02:24,157 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:24,265 INFO L625 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2020-12-23 01:02:24,271 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:02:24,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:87, output treesize:83 [2020-12-23 01:02:24,813 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-12-23 01:02:25,255 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-23 01:02:25,256 INFO L348 Elim1Store]: treesize reduction 17, result has 94.4 percent of original size [2020-12-23 01:02:25,256 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 [2020-12-23 01:02:25,267 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:25,425 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-12-23 01:02:25,426 INFO L625 ElimStorePlain]: treesize reduction 117, result has 52.4 percent of original size [2020-12-23 01:02:25,429 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:02:25,432 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:02:25,432 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:93, output treesize:129 [2020-12-23 01:02:25,436 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:02:25,583 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:02:26,020 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-23 01:02:26,032 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 11, 1] term [2020-12-23 01:02:26,033 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 01:02:26,063 INFO L443 ElimStorePlain]: Different costs {12=[v_prenex_8], 20=[|v_#memory_int_20|, v_prenex_6]} [2020-12-23 01:02:26,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:02:26,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:02:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:02:26,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:02:26,106 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 01:02:26,108 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 141 treesize of output 58 [2020-12-23 01:02:26,111 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:02:47,087 WARN L197 SmtUtils]: Spent 20.98 s on a formula simplification that was a NOOP. DAG size: 100 [2020-12-23 01:02:47,087 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:03:00,265 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~#array~0.offset| 4) |ULTIMATE.start_main_~#array~0.offset|) [2020-12-23 01:03:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:03:02,306 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |ULTIMATE.start_main_~#array~0.offset| (+ (* ULTIMATE.start_main_~index2~0 4) (* (+ ~ARR_SIZE~0 (* ULTIMATE.start_main_~index2~0 (- 1)) (- 1)) (* ~ARR_SIZE~0 4)) |ULTIMATE.start_main_~#array~0.offset|)) [2020-12-23 01:03:02,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:03:04,338 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (+ (* ULTIMATE.start_main_~index2~0 (* ~ARR_SIZE~0 4)) (* ULTIMATE.start_main_~index2~0 4) |ULTIMATE.start_main_~#array~0.offset|) |ULTIMATE.start_main_~#array~0.offset|) [2020-12-23 01:03:04,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:03:04,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:03:04,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:03:06,410 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (+ (* v_ULTIMATE.start_main_~column~0_22 4) |ULTIMATE.start_main_~#array~0.offset|) (+ (* ULTIMATE.start_main_~index2~0 4) (* (+ ~ARR_SIZE~0 (* ULTIMATE.start_main_~index2~0 (- 1)) (- 1)) (* ~ARR_SIZE~0 4)) |ULTIMATE.start_main_~#array~0.offset|)) [2020-12-23 01:03:06,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:03:08,791 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= (+ (* ULTIMATE.start_main_~index2~0 (* ~ARR_SIZE~0 4)) (* ULTIMATE.start_main_~index2~0 4) |ULTIMATE.start_main_~#array~0.offset|) (+ (* v_ULTIMATE.start_main_~column~0_22 4) |ULTIMATE.start_main_~#array~0.offset|)) [2020-12-23 01:03:08,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:03:08,797 INFO L244 Elim1Store]: Index analysis took 14738 ms [2020-12-23 01:03:10,952 WARN L197 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 01:03:10,953 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:03:10,953 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 226 [2020-12-23 01:03:10,962 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:04:56,127 WARN L197 SmtUtils]: Spent 1.75 m on a formula simplification. DAG size of input: 115 DAG size of output: 99 [2020-12-23 01:04:56,129 INFO L625 ElimStorePlain]: treesize reduction 94, result has 79.1 percent of original size [2020-12-23 01:04:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:04:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:04:56,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:04:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:04:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:04:56,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:04:56,357 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-23 01:04:56,358 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:04:56,359 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 150 treesize of output 279 [2020-12-23 01:04:56,366 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts.