/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-tiling/pnr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:31:32,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:31:32,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:31:32,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:31:32,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:31:32,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:31:32,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:31:32,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:31:32,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:31:32,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:31:32,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:31:32,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:31:32,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:31:32,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:31:32,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:31:32,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:31:32,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:31:32,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:31:32,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:31:32,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:31:32,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:31:32,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:31:32,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:31:32,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:31:32,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:31:32,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:31:32,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:31:32,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:31:32,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:31:32,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:31:32,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:31:32,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:31:32,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:31:32,326 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:31:32,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:31:32,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:31:32,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:31:32,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:31:32,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:31:32,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:31:32,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:31:32,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:31:32,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:31:32,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:31:32,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:31:32,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:31:32,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:31:32,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:31:32,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:31:32,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:31:32,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:31:32,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:31:32,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:31:32,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:31:32,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:31:32,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:31:32,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:31:32,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:31:32,830 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:31:32,831 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:31:32,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr2.c [2020-12-23 00:31:32,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ee5455cea/b813abebe876459a864001543f694dd6/FLAG5dcb6a0d4 [2020-12-23 00:31:33,551 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:31:33,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c [2020-12-23 00:31:33,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ee5455cea/b813abebe876459a864001543f694dd6/FLAG5dcb6a0d4 [2020-12-23 00:31:33,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ee5455cea/b813abebe876459a864001543f694dd6 [2020-12-23 00:31:33,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:31:33,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:31:33,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:31:33,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:31:33,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:31:33,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:31:33" (1/1) ... [2020-12-23 00:31:33,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f306d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:33, skipping insertion in model container [2020-12-23 00:31:33,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:31:33" (1/1) ... [2020-12-23 00:31:33,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:31:33,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:31:34,122 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c[395,408] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~value~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:31:34,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:31:34,163 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:31:34,181 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c[395,408] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~value~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:31:34,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:31:34,214 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:31:34,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34 WrapperNode [2020-12-23 00:31:34,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:31:34,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:31:34,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:31:34,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:31:34,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34" (1/1) ... [2020-12-23 00:31:34,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34" (1/1) ... [2020-12-23 00:31:34,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:31:34,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:31:34,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:31:34,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:31:34,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34" (1/1) ... [2020-12-23 00:31:34,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34" (1/1) ... [2020-12-23 00:31:34,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34" (1/1) ... [2020-12-23 00:31:34,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34" (1/1) ... [2020-12-23 00:31:34,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34" (1/1) ... [2020-12-23 00:31:34,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34" (1/1) ... [2020-12-23 00:31:34,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34" (1/1) ... [2020-12-23 00:31:34,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:31:34,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:31:34,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:31:34,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:31:34,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:31:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:31:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:31:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:31:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 00:31:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:31:34,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:31:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:31:34,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:31:34,996 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-23 00:31:34,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:31:34 BoogieIcfgContainer [2020-12-23 00:31:35,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:31:35,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:31:35,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:31:35,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:31:35,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:31:33" (1/3) ... [2020-12-23 00:31:35,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc15adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:31:35, skipping insertion in model container [2020-12-23 00:31:35,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:31:34" (2/3) ... [2020-12-23 00:31:35,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc15adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:31:35, skipping insertion in model container [2020-12-23 00:31:35,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:31:34" (3/3) ... [2020-12-23 00:31:35,015 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr2.c [2020-12-23 00:31:35,026 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:31:35,033 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:31:35,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:31:35,103 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:31:35,103 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:31:35,104 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:31:35,104 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:31:35,104 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:31:35,104 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:31:35,104 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:31:35,105 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:31:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 00:31:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:31:35,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:35,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:35,140 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:35,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1301010443, now seen corresponding path program 1 times [2020-12-23 00:31:35,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:35,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59082587] [2020-12-23 00:31:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:35,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59082587] [2020-12-23 00:31:35,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:31:35,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:31:35,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286344605] [2020-12-23 00:31:35,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:31:35,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:35,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:31:35,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:31:35,467 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-23 00:31:35,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:35,489 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2020-12-23 00:31:35,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:31:35,491 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 00:31:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:35,503 INFO L225 Difference]: With dead ends: 43 [2020-12-23 00:31:35,504 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 00:31:35,508 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 00:31:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 00:31:35,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 00:31:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 00:31:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-23 00:31:35,552 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2020-12-23 00:31:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:35,552 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-23 00:31:35,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:31:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-23 00:31:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:31:35,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:35,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:35,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:31:35,554 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:35,555 INFO L82 PathProgramCache]: Analyzing trace with hash 473996919, now seen corresponding path program 1 times [2020-12-23 00:31:35,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:35,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106126717] [2020-12-23 00:31:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:35,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106126717] [2020-12-23 00:31:35,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:31:35,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:31:35,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320731425] [2020-12-23 00:31:35,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:31:35,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:35,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:31:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:31:35,781 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-12-23 00:31:35,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:35,851 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-12-23 00:31:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:31:35,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 00:31:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:35,853 INFO L225 Difference]: With dead ends: 34 [2020-12-23 00:31:35,854 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 00:31:35,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:31:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 00:31:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2020-12-23 00:31:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:31:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-23 00:31:35,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 11 [2020-12-23 00:31:35,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:35,863 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-23 00:31:35,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:31:35,863 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-23 00:31:35,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 00:31:35,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:35,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:35,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:31:35,865 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash 273728487, now seen corresponding path program 1 times [2020-12-23 00:31:35,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:35,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531852616] [2020-12-23 00:31:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:36,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531852616] [2020-12-23 00:31:36,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861310462] [2020-12-23 00:31:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:31:36,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:36,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:31:36,654 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:31:36,657 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:36,669 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:36,672 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 00:31:36,672 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:31:36,729 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-12-23 00:31:36,730 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 00:31:36,733 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:36,740 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:36,744 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 00:31:36,745 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2020-12-23 00:31:36,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:36,821 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:36,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:36,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:36,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2020-12-23 00:31:36,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996858100] [2020-12-23 00:31:36,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:31:36,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:31:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:31:36,858 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 16 states. [2020-12-23 00:31:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:37,893 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-12-23 00:31:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:31:37,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-23 00:31:37,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:37,896 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:31:37,896 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:31:37,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=299, Invalid=823, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:31:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:31:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 23. [2020-12-23 00:31:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:31:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-23 00:31:37,905 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-12-23 00:31:37,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:37,906 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-23 00:31:37,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:31:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-23 00:31:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 00:31:37,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:37,907 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:38,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:31:38,123 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:38,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:38,125 INFO L82 PathProgramCache]: Analyzing trace with hash 970748829, now seen corresponding path program 1 times [2020-12-23 00:31:38,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:38,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633840872] [2020-12-23 00:31:38,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:38,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633840872] [2020-12-23 00:31:38,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033477461] [2020-12-23 00:31:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:38,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:31:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:38,535 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:31:38,577 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-23 00:31:38,578 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:38,583 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:38,584 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 00:31:38,585 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:10 [2020-12-23 00:31:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:38,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:38,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 00:31:38,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662723219] [2020-12-23 00:31:38,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:31:38,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:38,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:31:38,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:31:38,664 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 16 states. [2020-12-23 00:31:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:39,053 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-12-23 00:31:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:31:39,054 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-12-23 00:31:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:39,056 INFO L225 Difference]: With dead ends: 55 [2020-12-23 00:31:39,056 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 00:31:39,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:31:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 00:31:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2020-12-23 00:31:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 00:31:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-12-23 00:31:39,068 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 22 [2020-12-23 00:31:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:39,072 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-12-23 00:31:39,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:31:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-12-23 00:31:39,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 00:31:39,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:39,073 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:39,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:39,289 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:39,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:39,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1671813407, now seen corresponding path program 1 times [2020-12-23 00:31:39,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:39,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845981402] [2020-12-23 00:31:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:39,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845981402] [2020-12-23 00:31:39,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007337397] [2020-12-23 00:31:39,598 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 00:31:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:39,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:31:39,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:39,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:31:39,735 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:31:39,736 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:39,741 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:39,742 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:31:39,742 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 00:31:39,781 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-12-23 00:31:39,781 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2020-12-23 00:31:39,783 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:39,785 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:39,786 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:31:39,786 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-12-23 00:31:39,939 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:39,942 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:39,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:39,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2020-12-23 00:31:39,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769664326] [2020-12-23 00:31:39,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:31:39,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:39,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:31:39,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:31:39,977 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 19 states. [2020-12-23 00:31:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:40,941 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-12-23 00:31:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:31:40,942 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-23 00:31:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:40,945 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:31:40,945 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:31:40,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=328, Invalid=1154, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:31:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:31:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 27. [2020-12-23 00:31:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:31:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-23 00:31:40,956 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2020-12-23 00:31:40,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:40,957 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-23 00:31:40,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:31:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-23 00:31:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:31:40,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:40,959 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:41,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:41,160 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:41,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1375557715, now seen corresponding path program 2 times [2020-12-23 00:31:41,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:41,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571327309] [2020-12-23 00:31:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:41,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571327309] [2020-12-23 00:31:41,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216652885] [2020-12-23 00:31:41,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:41,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:31:41,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:41,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:31:41,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:41,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:41,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-23 00:31:41,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960847064] [2020-12-23 00:31:41,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:31:41,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:41,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:31:41,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:31:41,855 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 17 states. [2020-12-23 00:31:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:42,064 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-12-23 00:31:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:31:42,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-12-23 00:31:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:42,066 INFO L225 Difference]: With dead ends: 58 [2020-12-23 00:31:42,066 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 00:31:42,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:31:42,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 00:31:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-12-23 00:31:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:31:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-23 00:31:42,076 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 26 [2020-12-23 00:31:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:42,076 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-23 00:31:42,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:31:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-23 00:31:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:31:42,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:42,078 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:42,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:42,294 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:42,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:42,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2133875485, now seen corresponding path program 3 times [2020-12-23 00:31:42,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:42,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267867597] [2020-12-23 00:31:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:42,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267867597] [2020-12-23 00:31:42,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175436339] [2020-12-23 00:31:42,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:42,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:31:42,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:42,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:31:42,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:42,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:31:42,750 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:31:42,751 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:42,759 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:42,760 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 00:31:42,761 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:31:42,805 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:31:42,806 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 23 treesize of output 22 [2020-12-23 00:31:42,807 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:42,814 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:42,816 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 00:31:42,816 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2020-12-23 00:31:42,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:42,952 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:42,955 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:42,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:42,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2020-12-23 00:31:42,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123499212] [2020-12-23 00:31:42,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:31:42,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:42,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:31:42,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:31:42,983 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 21 states. [2020-12-23 00:31:44,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:44,776 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2020-12-23 00:31:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:31:44,777 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2020-12-23 00:31:44,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:44,779 INFO L225 Difference]: With dead ends: 96 [2020-12-23 00:31:44,780 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 00:31:44,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=513, Invalid=1937, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 00:31:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 00:31:44,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 38. [2020-12-23 00:31:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:31:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-23 00:31:44,792 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 33 [2020-12-23 00:31:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:44,793 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-23 00:31:44,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:31:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-23 00:31:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:31:44,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:44,797 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:45,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:31:45,014 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:45,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1647675751, now seen corresponding path program 4 times [2020-12-23 00:31:45,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:45,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179746276] [2020-12-23 00:31:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:45,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179746276] [2020-12-23 00:31:45,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921604822] [2020-12-23 00:31:45,334 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:45,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:31:45,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:31:45,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:45,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:31:45,485 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-23 00:31:45,488 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:45,492 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:45,494 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 00:31:45,495 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:10 [2020-12-23 00:31:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:45,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:45,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2020-12-23 00:31:45,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489200326] [2020-12-23 00:31:45,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:31:45,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:45,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:31:45,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:31:45,659 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 21 states. [2020-12-23 00:31:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:46,347 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-12-23 00:31:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:31:46,347 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-12-23 00:31:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:46,348 INFO L225 Difference]: With dead ends: 86 [2020-12-23 00:31:46,349 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 00:31:46,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:31:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 00:31:46,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2020-12-23 00:31:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 00:31:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-12-23 00:31:46,373 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 37 [2020-12-23 00:31:46,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:46,373 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-12-23 00:31:46,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:31:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-12-23 00:31:46,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:31:46,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:46,378 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:46,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:46,579 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash 958347803, now seen corresponding path program 1 times [2020-12-23 00:31:46,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:46,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915539029] [2020-12-23 00:31:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:46,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915539029] [2020-12-23 00:31:46,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758925738] [2020-12-23 00:31:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:47,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:31:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:47,081 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:31:47,139 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:31:47,141 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:47,146 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:47,147 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:31:47,147 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 00:31:47,189 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:31:47,189 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 00:31:47,191 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:47,193 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:47,194 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:31:47,194 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:31:47,450 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:47,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:47,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:47,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2020-12-23 00:31:47,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483421174] [2020-12-23 00:31:47,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:31:47,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:47,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:31:47,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:31:47,485 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 24 states. [2020-12-23 00:31:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:49,411 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2020-12-23 00:31:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:31:49,412 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2020-12-23 00:31:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:49,414 INFO L225 Difference]: With dead ends: 132 [2020-12-23 00:31:49,415 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 00:31:49,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:31:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 00:31:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 42. [2020-12-23 00:31:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 00:31:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-23 00:31:49,430 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 37 [2020-12-23 00:31:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:49,431 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-23 00:31:49,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:31:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-23 00:31:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:31:49,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:49,432 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:49,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:49,656 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:49,658 INFO L82 PathProgramCache]: Analyzing trace with hash 955874639, now seen corresponding path program 5 times [2020-12-23 00:31:49,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:49,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280790773] [2020-12-23 00:31:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:50,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280790773] [2020-12-23 00:31:50,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739400607] [2020-12-23 00:31:50,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:50,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:31:50,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:50,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:31:50,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:50,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:50,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-12-23 00:31:50,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805438702] [2020-12-23 00:31:50,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:31:50,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:50,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:31:50,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:31:50,721 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 23 states. [2020-12-23 00:31:51,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:51,133 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-12-23 00:31:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:31:51,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-12-23 00:31:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:51,135 INFO L225 Difference]: With dead ends: 79 [2020-12-23 00:31:51,136 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 00:31:51,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:31:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 00:31:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-12-23 00:31:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 00:31:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-23 00:31:51,153 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 41 [2020-12-23 00:31:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:51,153 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-23 00:31:51,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:31:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-23 00:31:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:31:51,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:51,155 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:51,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:31:51,371 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:51,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2077392575, now seen corresponding path program 6 times [2020-12-23 00:31:51,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:51,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458136598] [2020-12-23 00:31:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:51,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458136598] [2020-12-23 00:31:51,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147624350] [2020-12-23 00:31:51,733 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:51,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:31:51,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:51,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 00:31:51,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:51,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:31:52,052 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:31:52,053 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:52,061 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:52,063 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 00:31:52,063 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:31:52,124 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:31:52,124 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 23 treesize of output 22 [2020-12-23 00:31:52,126 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:52,132 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:52,134 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 00:31:52,135 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2020-12-23 00:31:52,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:52,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:52,402 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:52,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:52,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2020-12-23 00:31:52,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555023436] [2020-12-23 00:31:52,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:31:52,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:52,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:31:52,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:31:52,443 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 27 states. [2020-12-23 00:31:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:56,231 INFO L93 Difference]: Finished difference Result 155 states and 188 transitions. [2020-12-23 00:31:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 00:31:56,232 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 48 [2020-12-23 00:31:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:56,236 INFO L225 Difference]: With dead ends: 155 [2020-12-23 00:31:56,236 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 00:31:56,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=843, Invalid=4559, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 00:31:56,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 00:31:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 53. [2020-12-23 00:31:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 00:31:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-23 00:31:56,251 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 48 [2020-12-23 00:31:56,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:56,252 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-23 00:31:56,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:31:56,252 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-23 00:31:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 00:31:56,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:56,253 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:56,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:56,467 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1171587701, now seen corresponding path program 7 times [2020-12-23 00:31:56,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:56,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562142098] [2020-12-23 00:31:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:56,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562142098] [2020-12-23 00:31:56,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239486437] [2020-12-23 00:31:56,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:56,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 00:31:56,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:56,796 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:31:56,870 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:31:56,871 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:56,879 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:56,881 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:31:56,885 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2020-12-23 00:31:57,063 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:57,070 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:31:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:57,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:57,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2020-12-23 00:31:57,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883832245] [2020-12-23 00:31:57,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:31:57,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:57,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:31:57,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:31:57,111 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 21 states. [2020-12-23 00:32:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:32:01,265 INFO L93 Difference]: Finished difference Result 359 states and 448 transitions. [2020-12-23 00:32:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 00:32:01,266 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-12-23 00:32:01,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:32:01,270 INFO L225 Difference]: With dead ends: 359 [2020-12-23 00:32:01,270 INFO L226 Difference]: Without dead ends: 357 [2020-12-23 00:32:01,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3364 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1249, Invalid=8453, Unknown=0, NotChecked=0, Total=9702 [2020-12-23 00:32:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-12-23 00:32:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 84. [2020-12-23 00:32:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 00:32:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-12-23 00:32:01,308 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 52 [2020-12-23 00:32:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:32:01,308 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-12-23 00:32:01,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:32:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-12-23 00:32:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 00:32:01,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:32:01,310 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:32:01,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:32:01,525 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:32:01,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:32:01,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1200151561, now seen corresponding path program 2 times [2020-12-23 00:32:01,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:32:01,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192054308] [2020-12-23 00:32:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:32:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:32:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:01,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192054308] [2020-12-23 00:32:01,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899794006] [2020-12-23 00:32:01,810 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:32:01,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:32:01,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:32:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 00:32:01,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:32:01,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:32:02,061 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:32:02,062 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:02,069 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:02,070 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:02,071 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 00:32:02,125 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:32:02,126 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 00:32:02,128 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:02,131 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:02,132 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:02,132 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:32:02,589 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:32:02,591 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:32:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:02,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:32:02,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 31 [2020-12-23 00:32:02,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823984050] [2020-12-23 00:32:02,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:32:02,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:32:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:32:02,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:32:02,647 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 31 states. [2020-12-23 00:32:06,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:32:06,946 INFO L93 Difference]: Finished difference Result 199 states and 237 transitions. [2020-12-23 00:32:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 00:32:06,947 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 52 [2020-12-23 00:32:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:32:06,949 INFO L225 Difference]: With dead ends: 199 [2020-12-23 00:32:06,949 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 00:32:06,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=939, Invalid=6033, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 00:32:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 00:32:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 57. [2020-12-23 00:32:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 00:32:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-12-23 00:32:06,974 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 52 [2020-12-23 00:32:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:32:06,974 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-12-23 00:32:06,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:32:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-12-23 00:32:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:32:06,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:32:06,980 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:32:07,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:32:07,198 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:32:07,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:32:07,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2128788267, now seen corresponding path program 8 times [2020-12-23 00:32:07,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:32:07,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750682706] [2020-12-23 00:32:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:32:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:32:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 51 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:07,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750682706] [2020-12-23 00:32:07,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315790969] [2020-12-23 00:32:07,922 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:32:08,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:32:08,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:32:08,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:32:08,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:32:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 72 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:08,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:32:08,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2020-12-23 00:32:08,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630377713] [2020-12-23 00:32:08,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:32:08,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:32:08,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:32:08,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:32:08,716 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 29 states. [2020-12-23 00:32:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:32:09,247 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-12-23 00:32:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:32:09,248 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-23 00:32:09,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:32:09,249 INFO L225 Difference]: With dead ends: 102 [2020-12-23 00:32:09,249 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 00:32:09,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=321, Invalid=939, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:32:09,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 00:32:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-23 00:32:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:32:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-12-23 00:32:09,271 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 56 [2020-12-23 00:32:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:32:09,271 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-12-23 00:32:09,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:32:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-12-23 00:32:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:32:09,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:32:09,273 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:32:09,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:32:09,486 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:32:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:32:09,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1352182715, now seen corresponding path program 9 times [2020-12-23 00:32:09,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:32:09,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33741400] [2020-12-23 00:32:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:32:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:32:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:09,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33741400] [2020-12-23 00:32:09,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919908738] [2020-12-23 00:32:09,878 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:32:10,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:32:10,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:32:10,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 00:32:10,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:32:10,366 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:32:10,367 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:10,382 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:10,383 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:10,384 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-12-23 00:32:10,465 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:32:10,466 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:32:10,467 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:10,485 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:10,487 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 00:32:10,488 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:27 [2020-12-23 00:32:10,578 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:32:10,579 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:32:10,581 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:10,598 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:10,600 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:10,600 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2020-12-23 00:32:10,704 INFO L348 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2020-12-23 00:32:10,705 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 41 treesize of output 43 [2020-12-23 00:32:10,708 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:10,727 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:10,731 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 00:32:10,732 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:39 [2020-12-23 00:32:10,845 INFO L348 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2020-12-23 00:32:10,851 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 41 treesize of output 43 [2020-12-23 00:32:10,854 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:10,873 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:10,874 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:10,875 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2020-12-23 00:32:11,007 INFO L348 Elim1Store]: treesize reduction 177, result has 17.3 percent of original size [2020-12-23 00:32:11,008 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 53 treesize of output 58 [2020-12-23 00:32:11,010 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:11,034 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:11,036 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 00:32:11,036 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:51 [2020-12-23 00:32:11,226 INFO L348 Elim1Store]: treesize reduction 64, result has 56.8 percent of original size [2020-12-23 00:32:11,226 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 51 treesize of output 102 [2020-12-23 00:32:11,230 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:11,294 INFO L625 ElimStorePlain]: treesize reduction 54, result has 53.0 percent of original size [2020-12-23 00:32:11,295 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:11,296 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:61 [2020-12-23 00:32:11,478 INFO L348 Elim1Store]: treesize reduction 206, result has 15.6 percent of original size [2020-12-23 00:32:11,478 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 63 treesize of output 59 [2020-12-23 00:32:11,481 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:11,506 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:11,509 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 00:32:11,515 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:77, output treesize:61 [2020-12-23 00:32:12,404 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:32:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:12,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:32:12,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25] total 40 [2020-12-23 00:32:12,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060968720] [2020-12-23 00:32:12,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:32:12,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:32:12,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:32:12,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1413, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:32:12,520 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 40 states. [2020-12-23 00:32:17,239 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-23 00:32:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:32:23,959 INFO L93 Difference]: Finished difference Result 232 states and 275 transitions. [2020-12-23 00:32:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-23 00:32:23,960 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 63 [2020-12-23 00:32:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:32:23,962 INFO L225 Difference]: With dead ends: 232 [2020-12-23 00:32:23,962 INFO L226 Difference]: Without dead ends: 230 [2020-12-23 00:32:23,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5469 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1978, Invalid=15314, Unknown=0, NotChecked=0, Total=17292 [2020-12-23 00:32:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-23 00:32:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 68. [2020-12-23 00:32:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 00:32:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-12-23 00:32:23,989 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 63 [2020-12-23 00:32:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:32:23,989 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-12-23 00:32:23,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:32:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-12-23 00:32:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:32:23,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:32:23,991 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:32:24,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:32:24,201 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:32:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:32:24,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1048293007, now seen corresponding path program 10 times [2020-12-23 00:32:24,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:32:24,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525438759] [2020-12-23 00:32:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:32:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:32:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:24,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525438759] [2020-12-23 00:32:24,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673842458] [2020-12-23 00:32:24,547 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:32:24,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:32:24,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:32:24,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:32:24,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:32:24,665 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:32:24,754 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:32:24,755 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:24,766 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:24,769 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:32:24,769 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2020-12-23 00:32:25,152 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:32:25,156 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:32:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:25,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:32:25,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2020-12-23 00:32:25,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53170429] [2020-12-23 00:32:25,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:32:25,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:32:25,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:32:25,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:32:25,209 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 26 states. [2020-12-23 00:32:43,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:32:43,296 INFO L93 Difference]: Finished difference Result 1193 states and 1532 transitions. [2020-12-23 00:32:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2020-12-23 00:32:43,297 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-12-23 00:32:43,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:32:43,304 INFO L225 Difference]: With dead ends: 1193 [2020-12-23 00:32:43,305 INFO L226 Difference]: Without dead ends: 1191 [2020-12-23 00:32:43,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36118 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=6749, Invalid=75333, Unknown=0, NotChecked=0, Total=82082 [2020-12-23 00:32:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2020-12-23 00:32:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 106. [2020-12-23 00:32:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 00:32:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 129 transitions. [2020-12-23 00:32:43,370 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 129 transitions. Word has length 67 [2020-12-23 00:32:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:32:43,370 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 129 transitions. [2020-12-23 00:32:43,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:32:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 129 transitions. [2020-12-23 00:32:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:32:43,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:32:43,372 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:32:43,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:32:43,587 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:32:43,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:32:43,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1892298509, now seen corresponding path program 3 times [2020-12-23 00:32:43,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:32:43,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564078362] [2020-12-23 00:32:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:32:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:32:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:44,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564078362] [2020-12-23 00:32:44,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019084412] [2020-12-23 00:32:44,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:32:44,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:32:44,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:32:44,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 00:32:44,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:32:44,407 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 31 treesize of output 29 [2020-12-23 00:32:44,410 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 00:32:44,433 INFO L625 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2020-12-23 00:32:44,437 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 00:32:44,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:24, output treesize:9 [2020-12-23 00:32:44,763 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:44,763 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 26 treesize of output 65 [2020-12-23 00:32:44,766 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:44,820 INFO L625 ElimStorePlain]: treesize reduction 24, result has 66.2 percent of original size [2020-12-23 00:32:44,824 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:44,824 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:24 [2020-12-23 00:32:44,910 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:32:44,910 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:32:44,912 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:44,926 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:44,928 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 00:32:44,928 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:24 [2020-12-23 00:32:45,011 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:32:45,012 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:32:45,014 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:45,028 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:45,032 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:45,033 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2020-12-23 00:32:45,134 INFO L348 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2020-12-23 00:32:45,134 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 41 treesize of output 43 [2020-12-23 00:32:45,136 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:45,154 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:45,157 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 00:32:45,157 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:38 [2020-12-23 00:32:45,289 INFO L348 Elim1Store]: treesize reduction 10, result has 88.2 percent of original size [2020-12-23 00:32:45,290 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 93 [2020-12-23 00:32:45,294 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:45,360 INFO L625 ElimStorePlain]: treesize reduction 42, result has 48.8 percent of original size [2020-12-23 00:32:45,363 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:45,364 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2020-12-23 00:32:45,493 INFO L348 Elim1Store]: treesize reduction 137, result has 17.5 percent of original size [2020-12-23 00:32:45,494 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 45 treesize of output 50 [2020-12-23 00:32:45,496 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:45,515 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:45,517 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 00:32:45,518 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:40 [2020-12-23 00:32:45,694 INFO L348 Elim1Store]: treesize reduction 79, result has 52.4 percent of original size [2020-12-23 00:32:45,694 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 45 treesize of output 108 [2020-12-23 00:32:45,698 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:45,756 INFO L625 ElimStorePlain]: treesize reduction 42, result has 55.3 percent of original size [2020-12-23 00:32:45,757 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:45,757 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2020-12-23 00:32:45,931 INFO L348 Elim1Store]: treesize reduction 224, result has 15.5 percent of original size [2020-12-23 00:32:45,932 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 72 treesize of output 62 [2020-12-23 00:32:45,936 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:45,959 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:45,960 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:45,961 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:83, output treesize:88 [2020-12-23 00:32:47,303 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:32:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:47,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:32:47,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 45 [2020-12-23 00:32:47,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588027545] [2020-12-23 00:32:47,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:32:47,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:32:47,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:32:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1809, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:32:47,500 INFO L87 Difference]: Start difference. First operand 106 states and 129 transitions. Second operand 45 states. [2020-12-23 00:32:54,049 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-23 00:33:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:33:03,859 INFO L93 Difference]: Finished difference Result 312 states and 369 transitions. [2020-12-23 00:33:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-23 00:33:03,861 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 67 [2020-12-23 00:33:03,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:33:03,864 INFO L225 Difference]: With dead ends: 312 [2020-12-23 00:33:03,864 INFO L226 Difference]: Without dead ends: 310 [2020-12-23 00:33:03,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4322 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=873, Invalid=11783, Unknown=0, NotChecked=0, Total=12656 [2020-12-23 00:33:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-23 00:33:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 111. [2020-12-23 00:33:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 00:33:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2020-12-23 00:33:03,934 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 67 [2020-12-23 00:33:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:33:03,935 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2020-12-23 00:33:03,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:33:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2020-12-23 00:33:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:33:03,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:33:03,936 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:33:04,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:33:04,151 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:33:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:33:04,153 INFO L82 PathProgramCache]: Analyzing trace with hash -862939211, now seen corresponding path program 1 times [2020-12-23 00:33:04,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:33:04,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367767953] [2020-12-23 00:33:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:33:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:33:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:04,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367767953] [2020-12-23 00:33:04,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144380560] [2020-12-23 00:33:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:33:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:33:04,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:33:04,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:33:04,871 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:33:05,184 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 13 treesize of output 9 [2020-12-23 00:33:05,210 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:33:05,222 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:33:05,224 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 00:33:05,225 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2020-12-23 00:33:05,937 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:33:05,943 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:33:05,946 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:33:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:06,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:33:06,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2020-12-23 00:33:06,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693940925] [2020-12-23 00:33:06,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:33:06,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:33:06,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:33:06,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:33:06,025 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand 35 states. [2020-12-23 00:33:11,587 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-23 00:33:13,109 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-23 00:33:14,295 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-23 00:33:16,665 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-23 00:33:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:33:20,205 INFO L93 Difference]: Finished difference Result 396 states and 467 transitions. [2020-12-23 00:33:20,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-12-23 00:33:20,207 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2020-12-23 00:33:20,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:33:20,211 INFO L225 Difference]: With dead ends: 396 [2020-12-23 00:33:20,211 INFO L226 Difference]: Without dead ends: 394 [2020-12-23 00:33:20,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5683 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=2107, Invalid=15715, Unknown=0, NotChecked=0, Total=17822 [2020-12-23 00:33:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-23 00:33:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 72. [2020-12-23 00:33:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:33:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-12-23 00:33:20,248 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 67 [2020-12-23 00:33:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:33:20,248 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-12-23 00:33:20,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:33:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-12-23 00:33:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:33:20,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:33:20,249 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:33:20,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:33:20,464 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:33:20,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:33:20,465 INFO L82 PathProgramCache]: Analyzing trace with hash -468046809, now seen corresponding path program 11 times [2020-12-23 00:33:20,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:33:20,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160266627] [2020-12-23 00:33:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:33:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:33:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 99 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:21,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160266627] [2020-12-23 00:33:21,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567106160] [2020-12-23 00:33:21,839 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:33:21,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 00:33:21,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:33:21,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:33:21,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:33:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 128 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:23,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:33:23,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2020-12-23 00:33:23,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56630255] [2020-12-23 00:33:23,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:33:23,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:33:23,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:33:23,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:33:23,256 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 35 states. [2020-12-23 00:33:24,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:33:24,317 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2020-12-23 00:33:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:33:24,319 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 71 [2020-12-23 00:33:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:33:24,320 INFO L225 Difference]: With dead ends: 125 [2020-12-23 00:33:24,320 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 00:33:24,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=439, Invalid=1367, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:33:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 00:33:24,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-12-23 00:33:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 00:33:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-12-23 00:33:24,370 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 71 [2020-12-23 00:33:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:33:24,370 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-12-23 00:33:24,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:33:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-12-23 00:33:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 00:33:24,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:33:24,372 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:33:24,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:33:24,580 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:33:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:33:24,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1943210391, now seen corresponding path program 12 times [2020-12-23 00:33:24,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:33:24,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977284888] [2020-12-23 00:33:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:33:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:33:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:25,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977284888] [2020-12-23 00:33:25,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219879210] [2020-12-23 00:33:25,257 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:33:25,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:33:25,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:33:25,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 00:33:25,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:33:25,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:33:25,972 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:33:25,979 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:33:25,995 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:33:25,996 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:33:25,997 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:33:26,123 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:33:26,124 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:33:26,127 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:33:26,148 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:33:26,151 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 00:33:26,152 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:33:26,280 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:33:26,281 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2020-12-23 00:33:26,283 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:33:26,298 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:33:26,300 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:33:26,300 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:33:26,446 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2020-12-23 00:33:26,447 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2020-12-23 00:33:26,449 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:33:26,463 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:33:26,466 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 00:33:26,466 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2020-12-23 00:33:27,641 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:33:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:27,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:33:27,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 42 [2020-12-23 00:33:27,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976155705] [2020-12-23 00:33:27,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:33:27,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:33:27,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:33:27,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1577, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:33:27,779 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 42 states. [2020-12-23 00:33:31,294 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-23 00:33:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:33:41,239 INFO L93 Difference]: Finished difference Result 265 states and 313 transitions. [2020-12-23 00:33:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-12-23 00:33:41,240 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 78 [2020-12-23 00:33:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:33:41,242 INFO L225 Difference]: With dead ends: 265 [2020-12-23 00:33:41,242 INFO L226 Difference]: Without dead ends: 263 [2020-12-23 00:33:41,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5992 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2071, Invalid=17389, Unknown=0, NotChecked=0, Total=19460 [2020-12-23 00:33:41,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-23 00:33:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 83. [2020-12-23 00:33:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:33:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2020-12-23 00:33:41,282 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 78 [2020-12-23 00:33:41,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:33:41,283 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2020-12-23 00:33:41,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:33:41,283 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2020-12-23 00:33:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:33:41,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:33:41,284 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:33:41,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:33:41,500 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:33:41,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:33:41,501 INFO L82 PathProgramCache]: Analyzing trace with hash -496737971, now seen corresponding path program 13 times [2020-12-23 00:33:41,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:33:41,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058091781] [2020-12-23 00:33:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:33:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:33:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:42,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058091781] [2020-12-23 00:33:42,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590365387] [2020-12-23 00:33:42,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:33:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:33:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 00:33:42,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:33:42,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:33:42,319 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:33:42,320 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:33:42,333 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:33:42,336 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:33:42,336 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2020-12-23 00:33:42,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:33:42,963 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:33:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:43,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:33:43,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 31 [2020-12-23 00:33:43,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560627342] [2020-12-23 00:33:43,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:33:43,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:33:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:33:43,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:33:43,046 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 31 states. [2020-12-23 00:34:41,260 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-23 00:34:55,954 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 00:35:03,077 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-23 00:35:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:17,215 INFO L93 Difference]: Finished difference Result 4309 states and 5628 transitions. [2020-12-23 00:35:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 926 states. [2020-12-23 00:35:17,216 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 82 [2020-12-23 00:35:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:17,234 INFO L225 Difference]: With dead ends: 4309 [2020-12-23 00:35:17,234 INFO L226 Difference]: Without dead ends: 4307 [2020-12-23 00:35:17,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1025 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 952 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442302 ImplicationChecksByTransitivity, 71.3s TimeCoverageRelationStatistics Valid=45008, Invalid=864154, Unknown=0, NotChecked=0, Total=909162 [2020-12-23 00:35:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4307 states. [2020-12-23 00:35:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4307 to 128. [2020-12-23 00:35:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 00:35:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 156 transitions. [2020-12-23 00:35:17,400 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 156 transitions. Word has length 82 [2020-12-23 00:35:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:17,400 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 156 transitions. [2020-12-23 00:35:17,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:35:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 156 transitions. [2020-12-23 00:35:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:35:17,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:17,401 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:17,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:17,616 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:17,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1394131249, now seen corresponding path program 4 times [2020-12-23 00:35:17,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:17,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883993063] [2020-12-23 00:35:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:18,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883993063] [2020-12-23 00:35:18,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417939685] [2020-12-23 00:35:18,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:18,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:35:18,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 00:35:18,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:18,553 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:35:18,955 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:18,957 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:18,965 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:18,966 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:18,967 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 00:35:19,063 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:35:19,064 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 00:35:19,067 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:19,071 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:19,072 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:19,073 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:35:20,214 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:20,216 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:20,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:20,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 43 [2020-12-23 00:35:20,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514087667] [2020-12-23 00:35:20,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:35:20,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:20,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:35:20,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:35:20,312 INFO L87 Difference]: Start difference. First operand 128 states and 156 transitions. Second operand 43 states. [2020-12-23 00:35:26,323 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-23 00:35:31,098 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35