/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-fpi/s5if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:25:03,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:25:03,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:25:03,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:25:03,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:25:03,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:25:03,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:25:03,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:25:03,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:25:03,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:25:03,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:25:03,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:25:03,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:25:03,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:25:03,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:25:03,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:25:03,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:25:03,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:25:03,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:25:03,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:25:03,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:25:03,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:25:03,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:25:03,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:25:03,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:25:03,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 11:25:03,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 11:25:03,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 11:25:03,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 11:25:03,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 11:25:03,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 11:25:03,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 11:25:03,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 11:25:03,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:25:03,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:25:03,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:25:03,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 11:25:03,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:25:03,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:25:03,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:25:03,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:25:03,244 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:25:03,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:25:03,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:25:03,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:25:03,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:25:03,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:25:03,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:25:03,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:25:03,249 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:25:03,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:25:03,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:25:03,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:25:03,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:25:03,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:25:03,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:25:03,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:25:03,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:25:03,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:25:03,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:25:03,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:25:03,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:25:03,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:25:03,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:25:03,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:25:03,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:25:03,753 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:25:03,754 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:25:03,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s5if.c [2021-01-06 11:25:03,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/03625b324/b1d8aa2945914f309e8b66aa40024388/FLAG680b8874a [2021-01-06 11:25:04,609 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:25:04,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/s5if.c [2021-01-06 11:25:04,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/03625b324/b1d8aa2945914f309e8b66aa40024388/FLAG680b8874a [2021-01-06 11:25:04,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/03625b324/b1d8aa2945914f309e8b66aa40024388 [2021-01-06 11:25:04,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:25:04,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:25:04,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:25:04,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:25:04,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:25:04,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:25:04" (1/1) ... [2021-01-06 11:25:04,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb97ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:04, skipping insertion in model container [2021-01-06 11:25:04,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:25:04" (1/1) ... [2021-01-06 11:25:04,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:25:04,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:25:05,142 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-fpi/s5if.c[587,600] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~i~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],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] [2021-01-06 11:25:05,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:25:05,184 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:25:05,205 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-fpi/s5if.c[587,600] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~i~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],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] [2021-01-06 11:25:05,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:25:05,239 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:25:05,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05 WrapperNode [2021-01-06 11:25:05,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:25:05,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:25:05,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:25:05,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:25:05,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05" (1/1) ... [2021-01-06 11:25:05,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05" (1/1) ... [2021-01-06 11:25:05,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:25:05,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:25:05,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:25:05,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:25:05,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05" (1/1) ... [2021-01-06 11:25:05,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05" (1/1) ... [2021-01-06 11:25:05,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05" (1/1) ... [2021-01-06 11:25:05,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05" (1/1) ... [2021-01-06 11:25:05,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05" (1/1) ... [2021-01-06 11:25:05,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05" (1/1) ... [2021-01-06 11:25:05,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05" (1/1) ... [2021-01-06 11:25:05,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:25:05,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:25:05,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:25:05,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:25:05,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:25:05,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:25:05,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:25:05,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:25:05,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 11:25:05,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:25:05,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:25:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:25:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 11:25:06,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:25:06,036 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 11:25:06,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:25:06 BoogieIcfgContainer [2021-01-06 11:25:06,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:25:06,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:25:06,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:25:06,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:25:06,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:25:04" (1/3) ... [2021-01-06 11:25:06,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1aff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:25:06, skipping insertion in model container [2021-01-06 11:25:06,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:25:05" (2/3) ... [2021-01-06 11:25:06,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1aff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:25:06, skipping insertion in model container [2021-01-06 11:25:06,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:25:06" (3/3) ... [2021-01-06 11:25:06,049 INFO L111 eAbstractionObserver]: Analyzing ICFG s5if.c [2021-01-06 11:25:06,057 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:25:06,062 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:25:06,118 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:25:06,152 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:25:06,152 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:25:06,152 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:25:06,153 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:25:06,153 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:25:06,153 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:25:06,153 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:25:06,154 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:25:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-01-06 11:25:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 11:25:06,181 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:06,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:06,182 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-01-06 11:25:06,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:06,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406078421] [2021-01-06 11:25:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:06,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406078421] [2021-01-06 11:25:06,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:25:06,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:25:06,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253618316] [2021-01-06 11:25:06,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:25:06,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:06,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:25:06,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:25:06,450 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2021-01-06 11:25:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:06,477 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-01-06 11:25:06,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:25:06,479 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 11:25:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:06,491 INFO L225 Difference]: With dead ends: 34 [2021-01-06 11:25:06,492 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 11:25:06,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:25:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 11:25:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 11:25:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 11:25:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-01-06 11:25:06,547 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-01-06 11:25:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:06,548 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-01-06 11:25:06,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:25:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-01-06 11:25:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 11:25:06,549 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:06,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:06,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:25:06,554 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:06,555 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-01-06 11:25:06,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:06,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299527731] [2021-01-06 11:25:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:06,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299527731] [2021-01-06 11:25:06,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:25:06,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:25:06,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189629132] [2021-01-06 11:25:06,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:25:06,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:06,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:25:06,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:25:06,675 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2021-01-06 11:25:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:06,790 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-01-06 11:25:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:25:06,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 11:25:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:06,793 INFO L225 Difference]: With dead ends: 28 [2021-01-06 11:25:06,793 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 11:25:06,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:25:06,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 11:25:06,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-01-06 11:25:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 11:25:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 11:25:06,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-01-06 11:25:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:06,803 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 11:25:06,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:25:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 11:25:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:25:06,804 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:06,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:06,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:25:06,805 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:06,806 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-01-06 11:25:06,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:06,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332083388] [2021-01-06 11:25:06,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:07,624 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-01-06 11:25:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:07,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332083388] [2021-01-06 11:25:07,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470835002] [2021-01-06 11:25:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 11:25:07,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:08,228 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 10 treesize of output 8 [2021-01-06 11:25:08,247 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:08,292 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:08,308 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 11 treesize of output 7 [2021-01-06 11:25:08,311 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:08,338 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:08,340 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:08,341 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-01-06 11:25:08,472 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-01-06 11:25:08,480 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:08,514 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:08,523 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:08,529 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-01-06 11:25:09,196 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:09,198 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2021-01-06 11:25:09,206 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:09,234 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:09,254 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:09,255 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:53 [2021-01-06 11:25:09,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:25:09,449 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:25:09,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:09,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:09,465 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:25:09,468 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:25:09,480 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 11:25:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:09,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:09,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 11:25:09,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597312410] [2021-01-06 11:25:09,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 11:25:09,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:09,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 11:25:09,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:25:09,547 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 20 states. [2021-01-06 11:25:09,896 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-01-06 11:25:10,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:10,610 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 11:25:10,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:25:10,610 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 16 [2021-01-06 11:25:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:10,613 INFO L225 Difference]: With dead ends: 35 [2021-01-06 11:25:10,614 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 11:25:10,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:25:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 11:25:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-01-06 11:25:10,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:25:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-06 11:25:10,622 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-01-06 11:25:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:10,623 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-06 11:25:10,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 11:25:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-06 11:25:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 11:25:10,624 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:10,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:10,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 11:25:10,841 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:10,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-01-06 11:25:10,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:10,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003859041] [2021-01-06 11:25:10,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:10,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003859041] [2021-01-06 11:25:10,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099920686] [2021-01-06 11:25:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:11,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:25:11,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:11,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:25:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:11,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:11,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 11:25:11,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239049832] [2021-01-06 11:25:11,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:25:11,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:11,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:25:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:25:11,099 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2021-01-06 11:25:11,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:11,318 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-01-06 11:25:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:25:11,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-01-06 11:25:11,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:11,320 INFO L225 Difference]: With dead ends: 33 [2021-01-06 11:25:11,320 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 11:25:11,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:25:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 11:25:11,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-01-06 11:25:11,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 11:25:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-01-06 11:25:11,328 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-01-06 11:25:11,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:11,328 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-01-06 11:25:11,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:25:11,329 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-01-06 11:25:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 11:25:11,330 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:11,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:11,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:11,544 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:11,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-01-06 11:25:11,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:11,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949041935] [2021-01-06 11:25:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:11,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949041935] [2021-01-06 11:25:11,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251258857] [2021-01-06 11:25:11,685 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:11,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 11:25:11,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:11,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:25:11,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:11,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:11,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 11:25:11,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115646771] [2021-01-06 11:25:11,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:25:11,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:11,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:25:11,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:25:11,856 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 10 states. [2021-01-06 11:25:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:11,990 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-01-06 11:25:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:25:11,990 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2021-01-06 11:25:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:11,994 INFO L225 Difference]: With dead ends: 37 [2021-01-06 11:25:11,994 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 11:25:11,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:25:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 11:25:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-01-06 11:25:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 11:25:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-01-06 11:25:12,012 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2021-01-06 11:25:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:12,015 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-01-06 11:25:12,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:25:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-01-06 11:25:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 11:25:12,017 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:12,017 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:12,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:12,219 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:12,221 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-01-06 11:25:12,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:12,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801538168] [2021-01-06 11:25:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:12,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801538168] [2021-01-06 11:25:12,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826038739] [2021-01-06 11:25:12,908 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:12,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:25:12,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:12,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 11:25:13,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:13,025 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 10 treesize of output 8 [2021-01-06 11:25:13,028 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:13,036 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:13,041 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-01-06 11:25:13,042 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:13,049 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:13,050 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:13,051 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-01-06 11:25:13,093 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-01-06 11:25:13,095 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:13,107 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:13,108 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:13,108 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-01-06 11:25:13,213 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:13,213 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:25:13,220 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:13,266 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.3 percent of original size [2021-01-06 11:25:13,267 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:13,267 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2021-01-06 11:25:13,535 INFO L348 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2021-01-06 11:25:13,536 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 75 [2021-01-06 11:25:13,541 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:13,575 INFO L625 ElimStorePlain]: treesize reduction 22, result has 70.7 percent of original size [2021-01-06 11:25:13,577 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:13,578 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:53 [2021-01-06 11:25:13,867 INFO L348 Elim1Store]: treesize reduction 10, result has 87.3 percent of original size [2021-01-06 11:25:13,868 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 131 [2021-01-06 11:25:13,874 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:13,954 INFO L625 ElimStorePlain]: treesize reduction 20, result has 75.6 percent of original size [2021-01-06 11:25:13,961 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:13,962 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:89, output treesize:62 [2021-01-06 11:25:14,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:14,134 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:14,151 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:14,154 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:25:14,171 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:14,174 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 11:25:14,187 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 11:25:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:14,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:14,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-01-06 11:25:14,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654502205] [2021-01-06 11:25:14,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 11:25:14,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:14,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 11:25:14,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:25:14,238 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 26 states. [2021-01-06 11:25:15,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:15,599 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 11:25:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:25:15,600 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 21 [2021-01-06 11:25:15,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:15,601 INFO L225 Difference]: With dead ends: 46 [2021-01-06 11:25:15,601 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 11:25:15,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 11:25:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 11:25:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-01-06 11:25:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 11:25:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-01-06 11:25:15,610 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 21 [2021-01-06 11:25:15,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:15,611 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-01-06 11:25:15,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 11:25:15,611 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-01-06 11:25:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 11:25:15,612 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:15,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:15,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:15,828 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:15,829 INFO L82 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2021-01-06 11:25:15,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:15,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841361104] [2021-01-06 11:25:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:15,853 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:25:15,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147261324] [2021-01-06 11:25:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:15,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:25:15,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:15,933 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 10 treesize of output 8 [2021-01-06 11:25:15,935 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:15,941 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:15,942 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:15,947 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2021-01-06 11:25:15,980 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:25:15,981 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:15,986 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:15,987 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:15,988 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 11:25:16,039 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:16,039 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2021-01-06 11:25:16,047 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:16,063 INFO L625 ElimStorePlain]: treesize reduction 18, result has 48.6 percent of original size [2021-01-06 11:25:16,067 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:16,068 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:13 [2021-01-06 11:25:16,107 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2021-01-06 11:25:16,109 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:16,111 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:16,112 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:16,112 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-01-06 11:25:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:16,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841361104] [2021-01-06 11:25:16,129 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:25:16,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147261324] [2021-01-06 11:25:16,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:25:16,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 11:25:16,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543281972] [2021-01-06 11:25:16,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:25:16,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:16,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:25:16,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:25:16,133 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 9 states. [2021-01-06 11:25:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:16,290 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-01-06 11:25:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:25:16,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2021-01-06 11:25:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:16,291 INFO L225 Difference]: With dead ends: 41 [2021-01-06 11:25:16,291 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 11:25:16,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:25:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 11:25:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-01-06 11:25:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 11:25:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-01-06 11:25:16,299 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2021-01-06 11:25:16,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:16,300 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-01-06 11:25:16,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:25:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-01-06 11:25:16,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 11:25:16,301 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:16,301 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:16,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 11:25:16,516 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:16,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2132829117, now seen corresponding path program 5 times [2021-01-06 11:25:16,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:16,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194664885] [2021-01-06 11:25:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:16,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194664885] [2021-01-06 11:25:16,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323220349] [2021-01-06 11:25:16,630 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:16,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 11:25:16,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:16,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:25:16,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:16,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:16,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 11:25:16,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703791834] [2021-01-06 11:25:16,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:25:16,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:16,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:25:16,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:25:16,809 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 13 states. [2021-01-06 11:25:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:17,075 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-01-06 11:25:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:25:17,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2021-01-06 11:25:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:17,077 INFO L225 Difference]: With dead ends: 41 [2021-01-06 11:25:17,077 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 11:25:17,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:25:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 11:25:17,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-01-06 11:25:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 11:25:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 11:25:17,087 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2021-01-06 11:25:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:17,087 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 11:25:17,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:25:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 11:25:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 11:25:17,088 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:17,088 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:17,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:17,302 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:17,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:17,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1038837147, now seen corresponding path program 6 times [2021-01-06 11:25:17,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:17,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713459826] [2021-01-06 11:25:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:17,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713459826] [2021-01-06 11:25:17,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006293187] [2021-01-06 11:25:17,391 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:17,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 11:25:17,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:17,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:25:17,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:17,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:17,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 11:25:17,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967383121] [2021-01-06 11:25:17,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:25:17,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:17,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:25:17,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:25:17,585 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 13 states. [2021-01-06 11:25:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:17,784 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-01-06 11:25:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:25:17,785 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2021-01-06 11:25:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:17,786 INFO L225 Difference]: With dead ends: 45 [2021-01-06 11:25:17,786 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 11:25:17,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:25:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 11:25:17,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-01-06 11:25:17,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 11:25:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-01-06 11:25:17,793 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2021-01-06 11:25:17,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:17,794 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-01-06 11:25:17,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:25:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-01-06 11:25:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 11:25:17,795 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:17,795 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:18,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:18,010 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:18,010 INFO L82 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 7 times [2021-01-06 11:25:18,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:18,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020029093] [2021-01-06 11:25:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:18,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020029093] [2021-01-06 11:25:18,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733732243] [2021-01-06 11:25:18,743 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:18,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 11:25:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:18,916 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 11 treesize of output 7 [2021-01-06 11:25:18,917 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:18,928 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:18,929 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:18,929 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:25:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:18,993 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-01-06 11:25:18,994 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:19,012 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:19,014 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:19,014 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2021-01-06 11:25:19,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:19,150 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:19,151 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:25:19,154 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:19,199 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-01-06 11:25:19,200 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:19,200 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-01-06 11:25:19,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:19,392 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2021-01-06 11:25:19,392 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2021-01-06 11:25:19,397 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:19,450 INFO L625 ElimStorePlain]: treesize reduction 20, result has 72.2 percent of original size [2021-01-06 11:25:19,451 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:19,451 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2021-01-06 11:25:19,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:19,883 INFO L348 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2021-01-06 11:25:19,884 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2021-01-06 11:25:19,891 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:19,947 INFO L625 ElimStorePlain]: treesize reduction 70, result has 47.4 percent of original size [2021-01-06 11:25:19,948 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:19,949 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:63 [2021-01-06 11:25:20,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:20,301 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 11:25:20,302 INFO L348 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2021-01-06 11:25:20,303 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 171 [2021-01-06 11:25:20,312 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:20,384 INFO L625 ElimStorePlain]: treesize reduction 134, result has 40.2 percent of original size [2021-01-06 11:25:20,387 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:20,387 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:99, output treesize:90 [2021-01-06 11:25:20,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:20,859 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-01-06 11:25:20,860 INFO L348 Elim1Store]: treesize reduction 32, result has 84.1 percent of original size [2021-01-06 11:25:20,861 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 261 [2021-01-06 11:25:20,872 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:20,967 INFO L625 ElimStorePlain]: treesize reduction 187, result has 38.9 percent of original size [2021-01-06 11:25:20,983 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:20,984 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:126, output treesize:119 [2021-01-06 11:25:21,188 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:21,191 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:21,196 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:21,199 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:25:21,222 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:21,228 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 11:25:21,248 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2021-01-06 11:25:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:21,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:21,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-01-06 11:25:21,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773852799] [2021-01-06 11:25:21,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 11:25:21,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:21,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 11:25:21,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 11:25:21,319 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 35 states. [2021-01-06 11:25:23,229 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-01-06 11:25:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:24,070 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-01-06 11:25:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 11:25:24,071 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 26 [2021-01-06 11:25:24,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:24,074 INFO L225 Difference]: With dead ends: 57 [2021-01-06 11:25:24,074 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 11:25:24,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=320, Invalid=2650, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 11:25:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 11:25:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-01-06 11:25:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 11:25:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-01-06 11:25:24,086 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2021-01-06 11:25:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:24,087 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-01-06 11:25:24,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 11:25:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-01-06 11:25:24,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 11:25:24,088 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:24,088 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:24,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 11:25:24,300 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:24,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2064736479, now seen corresponding path program 2 times [2021-01-06 11:25:24,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:24,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529474526] [2021-01-06 11:25:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:24,320 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:25:24,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719026879] [2021-01-06 11:25:24,320 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:24,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:25:24,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:24,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 11:25:24,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:24,453 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 [2021-01-06 11:25:24,454 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:24,460 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:24,460 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:24,461 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 11:25:24,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:24,515 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:24,516 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2021-01-06 11:25:24,522 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:24,540 INFO L625 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-01-06 11:25:24,541 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:24,541 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:18 [2021-01-06 11:25:24,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:24,582 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:24,582 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2021-01-06 11:25:24,585 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:24,603 INFO L625 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-01-06 11:25:24,606 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:24,606 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-01-06 11:25:24,649 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2021-01-06 11:25:24,650 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:24,652 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:24,652 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:24,653 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-01-06 11:25:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:24,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529474526] [2021-01-06 11:25:24,677 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:25:24,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719026879] [2021-01-06 11:25:24,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:25:24,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 11:25:24,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691429361] [2021-01-06 11:25:24,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:25:24,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:24,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:25:24,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:25:24,679 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 11 states. [2021-01-06 11:25:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:24,933 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-01-06 11:25:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:25:24,934 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2021-01-06 11:25:24,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:24,935 INFO L225 Difference]: With dead ends: 49 [2021-01-06 11:25:24,935 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 11:25:24,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:25:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 11:25:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-01-06 11:25:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 11:25:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-01-06 11:25:24,946 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 26 [2021-01-06 11:25:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:24,947 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-01-06 11:25:24,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:25:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-01-06 11:25:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 11:25:24,948 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:24,948 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:25,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:25,162 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:25,164 INFO L82 PathProgramCache]: Analyzing trace with hash 640571873, now seen corresponding path program 8 times [2021-01-06 11:25:25,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:25,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364560029] [2021-01-06 11:25:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:25,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364560029] [2021-01-06 11:25:25,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418976657] [2021-01-06 11:25:25,315 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:25,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:25:25,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:25,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:25:25,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:25,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:25,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-06 11:25:25,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101071623] [2021-01-06 11:25:25,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 11:25:25,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:25,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 11:25:25,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:25:25,515 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 16 states. [2021-01-06 11:25:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:25,937 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-01-06 11:25:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:25:25,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2021-01-06 11:25:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:25,939 INFO L225 Difference]: With dead ends: 49 [2021-01-06 11:25:25,939 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 11:25:25,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:25:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 11:25:25,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-01-06 11:25:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 11:25:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-01-06 11:25:25,952 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2021-01-06 11:25:25,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:25,952 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-01-06 11:25:25,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 11:25:25,953 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-01-06 11:25:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 11:25:25,954 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:25,954 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:26,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:26,159 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:26,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1478838205, now seen corresponding path program 9 times [2021-01-06 11:25:26,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:26,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816531572] [2021-01-06 11:25:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:26,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816531572] [2021-01-06 11:25:26,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286572577] [2021-01-06 11:25:26,319 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:26,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 11:25:26,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:26,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:25:26,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:26,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:26,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-06 11:25:26,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318298048] [2021-01-06 11:25:26,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 11:25:26,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:26,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 11:25:26,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:25:26,559 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2021-01-06 11:25:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:26,768 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-01-06 11:25:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:25:26,769 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2021-01-06 11:25:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:26,770 INFO L225 Difference]: With dead ends: 53 [2021-01-06 11:25:26,770 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 11:25:26,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:25:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 11:25:26,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-01-06 11:25:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 11:25:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-01-06 11:25:26,779 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2021-01-06 11:25:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:26,780 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-01-06 11:25:26,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 11:25:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-01-06 11:25:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 11:25:26,781 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:26,781 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:26,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 11:25:26,993 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:26,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:26,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2018974843, now seen corresponding path program 10 times [2021-01-06 11:25:26,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:26,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851816562] [2021-01-06 11:25:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:27,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851816562] [2021-01-06 11:25:27,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549247270] [2021-01-06 11:25:27,917 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:27,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:25:27,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:27,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 11:25:27,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:28,003 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 10 treesize of output 8 [2021-01-06 11:25:28,007 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:28,013 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:28,018 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 11 treesize of output 7 [2021-01-06 11:25:28,019 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:28,027 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:28,028 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:28,029 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-01-06 11:25:28,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:28,044 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-01-06 11:25:28,046 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:28,055 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:28,056 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:28,057 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2021-01-06 11:25:28,207 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:28,207 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:25:28,211 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:28,247 INFO L625 ElimStorePlain]: treesize reduction 20, result has 62.3 percent of original size [2021-01-06 11:25:28,248 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:28,249 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-01-06 11:25:28,435 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2021-01-06 11:25:28,436 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2021-01-06 11:25:28,439 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:28,483 INFO L625 ElimStorePlain]: treesize reduction 20, result has 69.2 percent of original size [2021-01-06 11:25:28,485 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:28,485 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-01-06 11:25:28,754 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2021-01-06 11:25:28,754 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2021-01-06 11:25:28,758 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:28,837 INFO L625 ElimStorePlain]: treesize reduction 64, result has 45.8 percent of original size [2021-01-06 11:25:28,839 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:28,839 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2021-01-06 11:25:29,392 INFO L348 Elim1Store]: treesize reduction 66, result has 45.5 percent of original size [2021-01-06 11:25:29,393 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 127 [2021-01-06 11:25:29,398 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:29,462 INFO L625 ElimStorePlain]: treesize reduction 24, result has 74.7 percent of original size [2021-01-06 11:25:29,464 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:29,464 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:88, output treesize:71 [2021-01-06 11:25:29,917 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-01-06 11:25:29,918 INFO L348 Elim1Store]: treesize reduction 66, result has 65.4 percent of original size [2021-01-06 11:25:29,919 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 97 treesize of output 211 [2021-01-06 11:25:29,926 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:30,004 INFO L625 ElimStorePlain]: treesize reduction 70, result has 54.5 percent of original size [2021-01-06 11:25:30,006 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:30,006 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:107, output treesize:84 [2021-01-06 11:25:30,468 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-01-06 11:25:30,469 INFO L348 Elim1Store]: treesize reduction 66, result has 65.4 percent of original size [2021-01-06 11:25:30,470 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 213 [2021-01-06 11:25:30,476 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:30,575 INFO L625 ElimStorePlain]: treesize reduction 138, result has 41.8 percent of original size [2021-01-06 11:25:30,579 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:30,580 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:109, output treesize:99 [2021-01-06 11:25:31,227 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2021-01-06 11:25:31,228 INFO L348 Elim1Store]: treesize reduction 66, result has 76.2 percent of original size [2021-01-06 11:25:31,229 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 316 [2021-01-06 11:25:31,241 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:31,339 INFO L625 ElimStorePlain]: treesize reduction 64, result has 58.7 percent of original size [2021-01-06 11:25:31,347 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:31,347 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:135, output treesize:91 [2021-01-06 11:25:31,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:31,546 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:31,549 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:31,552 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:25:31,564 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:31,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 11:25:31,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2021-01-06 11:25:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:31,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:31,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-01-06 11:25:31,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298797373] [2021-01-06 11:25:31,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 11:25:31,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:31,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 11:25:31,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 11:25:31,673 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 40 states. [2021-01-06 11:25:33,106 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-01-06 11:25:33,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:33,553 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-01-06 11:25:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 11:25:33,555 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 31 [2021-01-06 11:25:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:33,555 INFO L225 Difference]: With dead ends: 68 [2021-01-06 11:25:33,556 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 11:25:33,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 11:25:33,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 11:25:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-01-06 11:25:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 11:25:33,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-01-06 11:25:33,573 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2021-01-06 11:25:33,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:33,574 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-01-06 11:25:33,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 11:25:33,575 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-01-06 11:25:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 11:25:33,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:33,579 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:33,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:25:33,798 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:33,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1961716541, now seen corresponding path program 3 times [2021-01-06 11:25:33,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:33,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097301993] [2021-01-06 11:25:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:33,813 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:25:33,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427006353] [2021-01-06 11:25:33,813 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 [2021-01-06 11:25:33,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 11:25:33,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:25:33,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:33,929 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:25:33,930 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:33,941 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:33,942 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:33,942 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2021-01-06 11:25:34,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:34,043 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:34,043 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2021-01-06 11:25:34,046 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:34,072 INFO L625 ElimStorePlain]: treesize reduction 28, result has 47.2 percent of original size [2021-01-06 11:25:34,075 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:34,075 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2021-01-06 11:25:34,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:34,106 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:34,107 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2021-01-06 11:25:34,109 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:34,135 INFO L625 ElimStorePlain]: treesize reduction 20, result has 55.6 percent of original size [2021-01-06 11:25:34,137 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:34,137 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2021-01-06 11:25:34,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:34,170 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:34,170 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2021-01-06 11:25:34,172 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:34,201 INFO L625 ElimStorePlain]: treesize reduction 28, result has 47.2 percent of original size [2021-01-06 11:25:34,204 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:34,204 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:20 [2021-01-06 11:25:34,255 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:34,256 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-01-06 11:25:34,257 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 11:25:34,273 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:34,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:34,278 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:34,279 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:18 [2021-01-06 11:25:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 11:25:34,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097301993] [2021-01-06 11:25:34,351 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:25:34,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427006353] [2021-01-06 11:25:34,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:25:34,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 11:25:34,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027888855] [2021-01-06 11:25:34,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:25:34,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:34,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:25:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:25:34,353 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2021-01-06 11:25:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:34,664 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-01-06 11:25:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:25:34,665 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2021-01-06 11:25:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:34,665 INFO L225 Difference]: With dead ends: 54 [2021-01-06 11:25:34,666 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 11:25:34,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:25:34,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 11:25:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-01-06 11:25:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 11:25:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-01-06 11:25:34,678 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2021-01-06 11:25:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:34,679 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-01-06 11:25:34,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:25:34,679 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-01-06 11:25:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 11:25:34,680 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:34,680 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:34,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 11:25:34,894 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:34,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1399241145, now seen corresponding path program 11 times [2021-01-06 11:25:34,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:34,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366213078] [2021-01-06 11:25:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:35,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366213078] [2021-01-06 11:25:35,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153207537] [2021-01-06 11:25:35,093 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:35,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:25:35,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:35,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:25:35,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:35,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:35,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-01-06 11:25:35,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132811224] [2021-01-06 11:25:35,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:25:35,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:35,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:25:35,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:25:35,399 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 19 states. [2021-01-06 11:25:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:36,000 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-01-06 11:25:36,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 11:25:36,001 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2021-01-06 11:25:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:36,002 INFO L225 Difference]: With dead ends: 62 [2021-01-06 11:25:36,003 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 11:25:36,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:25:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 11:25:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-01-06 11:25:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 11:25:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-01-06 11:25:36,015 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 33 [2021-01-06 11:25:36,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:36,016 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-01-06 11:25:36,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:25:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-01-06 11:25:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 11:25:36,017 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:36,017 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:36,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:36,232 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:36,233 INFO L82 PathProgramCache]: Analyzing trace with hash 981485409, now seen corresponding path program 12 times [2021-01-06 11:25:36,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:36,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811154179] [2021-01-06 11:25:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:36,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811154179] [2021-01-06 11:25:36,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775466893] [2021-01-06 11:25:36,389 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:36,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 11:25:36,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:36,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:25:36,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:36,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:36,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-01-06 11:25:36,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244603646] [2021-01-06 11:25:36,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:25:36,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:36,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:25:36,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:25:36,678 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 19 states. [2021-01-06 11:25:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:36,981 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-01-06 11:25:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:25:36,982 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2021-01-06 11:25:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:36,983 INFO L225 Difference]: With dead ends: 66 [2021-01-06 11:25:36,983 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 11:25:36,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:25:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 11:25:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2021-01-06 11:25:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 11:25:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-01-06 11:25:36,996 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 34 [2021-01-06 11:25:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:36,996 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-01-06 11:25:36,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:25:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-01-06 11:25:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:25:36,997 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:36,997 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:37,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 11:25:37,213 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:37,214 INFO L82 PathProgramCache]: Analyzing trace with hash -596322977, now seen corresponding path program 13 times [2021-01-06 11:25:37,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:37,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750011438] [2021-01-06 11:25:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:38,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750011438] [2021-01-06 11:25:38,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670863892] [2021-01-06 11:25:38,419 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:38,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 11:25:38,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:38,634 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 11 treesize of output 7 [2021-01-06 11:25:38,635 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:38,646 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:38,647 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:38,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:25:38,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:38,733 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-01-06 11:25:38,734 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:38,749 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:38,750 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:38,750 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2021-01-06 11:25:38,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:38,928 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-01-06 11:25:38,929 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-01-06 11:25:38,930 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:38,946 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:38,947 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:38,948 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2021-01-06 11:25:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:39,184 INFO L348 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-01-06 11:25:39,184 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-01-06 11:25:39,186 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:39,212 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:39,216 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:39,217 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2021-01-06 11:25:39,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:39,501 INFO L348 Elim1Store]: treesize reduction 171, result has 17.8 percent of original size [2021-01-06 11:25:39,502 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 67 [2021-01-06 11:25:39,504 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:39,534 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:39,536 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:39,536 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:66 [2021-01-06 11:25:39,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:39,872 INFO L348 Elim1Store]: treesize reduction 264, result has 15.7 percent of original size [2021-01-06 11:25:39,873 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 82 [2021-01-06 11:25:39,876 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:39,912 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:39,913 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:39,913 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:85, output treesize:81 [2021-01-06 11:25:40,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:40,596 INFO L348 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2021-01-06 11:25:40,597 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 153 [2021-01-06 11:25:40,602 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:40,685 INFO L625 ElimStorePlain]: treesize reduction 48, result has 62.8 percent of original size [2021-01-06 11:25:40,686 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:40,686 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:98, output treesize:81 [2021-01-06 11:25:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:41,215 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2021-01-06 11:25:41,216 INFO L348 Elim1Store]: treesize reduction 112, result has 57.7 percent of original size [2021-01-06 11:25:41,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 251 [2021-01-06 11:25:41,228 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:41,335 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-01-06 11:25:41,336 INFO L625 ElimStorePlain]: treesize reduction 184, result has 37.0 percent of original size [2021-01-06 11:25:41,339 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:41,340 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:117, output treesize:108 [2021-01-06 11:25:41,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:42,112 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2021-01-06 11:25:42,113 INFO L348 Elim1Store]: treesize reduction 112, result has 69.3 percent of original size [2021-01-06 11:25:42,114 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 133 treesize of output 369 [2021-01-06 11:25:42,129 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:42,260 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-01-06 11:25:42,261 INFO L625 ElimStorePlain]: treesize reduction 138, result has 46.5 percent of original size [2021-01-06 11:25:42,263 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:42,264 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:120 [2021-01-06 11:25:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:43,199 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2021-01-06 11:25:43,200 INFO L348 Elim1Store]: treesize reduction 112, result has 69.3 percent of original size [2021-01-06 11:25:43,201 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 370 [2021-01-06 11:25:43,210 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:43,345 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-01-06 11:25:43,346 INFO L625 ElimStorePlain]: treesize reduction 124, result has 47.9 percent of original size [2021-01-06 11:25:43,348 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:43,348 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:145, output treesize:114 [2021-01-06 11:25:43,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:44,270 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2021-01-06 11:25:44,271 INFO L348 Elim1Store]: treesize reduction 112, result has 69.3 percent of original size [2021-01-06 11:25:44,272 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 128 treesize of output 368 [2021-01-06 11:25:44,282 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:44,429 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-01-06 11:25:44,430 INFO L625 ElimStorePlain]: treesize reduction 120, result has 48.7 percent of original size [2021-01-06 11:25:44,436 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:44,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:139, output treesize:114 [2021-01-06 11:25:44,760 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:25:44,762 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:25:44,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:44,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:44,777 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:25:44,781 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 11:25:44,792 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2021-01-06 11:25:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:44,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:44,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-01-06 11:25:44,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179481788] [2021-01-06 11:25:44,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 11:25:44,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:44,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 11:25:44,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2366, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 11:25:44,944 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 51 states. [2021-01-06 11:25:47,308 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-01-06 11:25:47,516 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-01-06 11:25:47,753 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-01-06 11:25:48,231 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-01-06 11:25:48,567 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-01-06 11:25:48,807 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 11:25:49,048 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-01-06 11:25:49,342 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-01-06 11:25:49,604 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-01-06 11:25:49,856 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-01-06 11:25:50,165 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-01-06 11:25:50,920 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-01-06 11:25:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:51,724 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2021-01-06 11:25:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 11:25:51,725 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 36 [2021-01-06 11:25:51,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:51,726 INFO L225 Difference]: With dead ends: 79 [2021-01-06 11:25:51,726 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 11:25:51,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=476, Invalid=6004, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 11:25:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 11:25:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-01-06 11:25:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 11:25:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-01-06 11:25:51,741 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 36 [2021-01-06 11:25:51,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:51,741 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-01-06 11:25:51,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 11:25:51,741 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-01-06 11:25:51,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:25:51,742 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:51,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:51,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 11:25:51,956 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:51,957 INFO L82 PathProgramCache]: Analyzing trace with hash 83735393, now seen corresponding path program 4 times [2021-01-06 11:25:51,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:51,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639851993] [2021-01-06 11:25:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:51,970 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:25:51,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270277248] [2021-01-06 11:25:51,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:52,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:25:52,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:52,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 11:25:52,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:52,045 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 10 treesize of output 8 [2021-01-06 11:25:52,047 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:52,053 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:52,054 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:52,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2021-01-06 11:25:52,110 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 15 treesize of output 11 [2021-01-06 11:25:52,111 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:52,120 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:52,121 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:52,122 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:25:52,198 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:52,198 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:25:52,201 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:52,236 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2021-01-06 11:25:52,238 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:52,239 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2021-01-06 11:25:52,436 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:52,436 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2021-01-06 11:25:52,439 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:52,477 INFO L625 ElimStorePlain]: treesize reduction 46, result has 40.3 percent of original size [2021-01-06 11:25:52,478 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:52,478 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2021-01-06 11:25:52,591 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:52,592 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2021-01-06 11:25:52,595 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:52,635 INFO L625 ElimStorePlain]: treesize reduction 46, result has 40.3 percent of original size [2021-01-06 11:25:52,636 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:52,637 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2021-01-06 11:25:52,749 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:52,750 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2021-01-06 11:25:52,753 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:52,794 INFO L625 ElimStorePlain]: treesize reduction 76, result has 29.0 percent of original size [2021-01-06 11:25:52,798 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:52,799 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2021-01-06 11:25:52,907 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:52,908 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-01-06 11:25:52,909 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:52,914 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:52,915 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:52,916 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2021-01-06 11:25:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 11:25:52,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639851993] [2021-01-06 11:25:52,953 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:25:52,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270277248] [2021-01-06 11:25:52,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:25:52,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 11:25:52,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145366584] [2021-01-06 11:25:52,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:25:52,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:52,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:25:52,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:25:52,954 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 15 states. [2021-01-06 11:25:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:53,647 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-01-06 11:25:53,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:25:53,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2021-01-06 11:25:53,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:53,649 INFO L225 Difference]: With dead ends: 64 [2021-01-06 11:25:53,649 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 11:25:53,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:25:53,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 11:25:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-01-06 11:25:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 11:25:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-01-06 11:25:53,661 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 36 [2021-01-06 11:25:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:53,661 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-01-06 11:25:53,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:25:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-01-06 11:25:53,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 11:25:53,662 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:53,662 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:53,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:53,864 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:53,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:53,864 INFO L82 PathProgramCache]: Analyzing trace with hash -746726435, now seen corresponding path program 14 times [2021-01-06 11:25:53,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:53,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585588532] [2021-01-06 11:25:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:54,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585588532] [2021-01-06 11:25:54,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682573051] [2021-01-06 11:25:54,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:54,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:25:54,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:54,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:25:54,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:54,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:54,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-01-06 11:25:54,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723007126] [2021-01-06 11:25:54,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 11:25:54,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:54,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 11:25:54,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:25:54,380 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 22 states. [2021-01-06 11:25:55,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:55,197 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-01-06 11:25:55,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:25:55,198 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2021-01-06 11:25:55,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:55,199 INFO L225 Difference]: With dead ends: 70 [2021-01-06 11:25:55,199 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 11:25:55,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 11:25:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 11:25:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2021-01-06 11:25:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 11:25:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-01-06 11:25:55,220 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 38 [2021-01-06 11:25:55,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:55,221 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-01-06 11:25:55,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 11:25:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-01-06 11:25:55,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 11:25:55,222 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:55,222 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:55,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:55,436 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:55,437 INFO L82 PathProgramCache]: Analyzing trace with hash 465948487, now seen corresponding path program 15 times [2021-01-06 11:25:55,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:55,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795608470] [2021-01-06 11:25:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:55,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795608470] [2021-01-06 11:25:55,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463096622] [2021-01-06 11:25:55,649 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:55,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 11:25:55,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:55,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:25:55,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:55,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:55,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-01-06 11:25:55,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228750642] [2021-01-06 11:25:55,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 11:25:55,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:55,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 11:25:55,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:25:55,999 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 22 states. [2021-01-06 11:25:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:56,366 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2021-01-06 11:25:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:25:56,367 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2021-01-06 11:25:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:56,368 INFO L225 Difference]: With dead ends: 74 [2021-01-06 11:25:56,368 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 11:25:56,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-01-06 11:25:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 11:25:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-01-06 11:25:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 11:25:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-01-06 11:25:56,381 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2021-01-06 11:25:56,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:56,382 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-01-06 11:25:56,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 11:25:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-01-06 11:25:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 11:25:56,382 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:56,383 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:56,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:56,599 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:56,601 INFO L82 PathProgramCache]: Analyzing trace with hash -552579063, now seen corresponding path program 16 times [2021-01-06 11:25:56,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:56,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380759686] [2021-01-06 11:25:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:58,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380759686] [2021-01-06 11:25:58,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883802937] [2021-01-06 11:25:58,338 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 [2021-01-06 11:25:58,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:25:58,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:58,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 11:25:58,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:58,412 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 10 treesize of output 8 [2021-01-06 11:25:58,414 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:58,423 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:58,428 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 11 treesize of output 7 [2021-01-06 11:25:58,429 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:58,437 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:58,438 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:58,439 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-01-06 11:25:58,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:58,453 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-01-06 11:25:58,454 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:58,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:58,467 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:58,468 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2021-01-06 11:25:58,653 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-01-06 11:25:58,653 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-01-06 11:25:58,655 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:58,673 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:58,674 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:58,674 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2021-01-06 11:25:58,961 INFO L348 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2021-01-06 11:25:58,962 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2021-01-06 11:25:58,964 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:59,032 INFO L625 ElimStorePlain]: treesize reduction 42, result has 50.0 percent of original size [2021-01-06 11:25:59,033 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:59,033 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2021-01-06 11:25:59,408 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-01-06 11:25:59,410 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2021-01-06 11:25:59,411 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2021-01-06 11:25:59,415 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:59,507 INFO L625 ElimStorePlain]: treesize reduction 64, result has 44.3 percent of original size [2021-01-06 11:25:59,509 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:59,509 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2021-01-06 11:25:59,975 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2021-01-06 11:25:59,977 INFO L348 Elim1Store]: treesize reduction 114, result has 51.7 percent of original size [2021-01-06 11:25:59,977 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 155 [2021-01-06 11:25:59,982 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:00,091 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-01-06 11:26:00,092 INFO L625 ElimStorePlain]: treesize reduction 64, result has 49.6 percent of original size [2021-01-06 11:26:00,092 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:00,093 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:63 [2021-01-06 11:26:00,660 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2021-01-06 11:26:00,661 INFO L348 Elim1Store]: treesize reduction 112, result has 62.7 percent of original size [2021-01-06 11:26:00,661 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 224 [2021-01-06 11:26:00,670 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:00,816 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-01-06 11:26:00,816 INFO L625 ElimStorePlain]: treesize reduction 108, result has 40.0 percent of original size [2021-01-06 11:26:00,818 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:00,819 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:72 [2021-01-06 11:26:01,855 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2021-01-06 11:26:01,856 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2021-01-06 11:26:01,857 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2021-01-06 11:26:01,863 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:01,988 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 11:26:01,989 INFO L625 ElimStorePlain]: treesize reduction 48, result has 65.0 percent of original size [2021-01-06 11:26:01,990 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:01,990 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:89 [2021-01-06 11:26:02,888 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2021-01-06 11:26:02,889 INFO L348 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2021-01-06 11:26:02,889 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 291 [2021-01-06 11:26:02,896 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:02,965 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:02,967 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:02,967 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:125, output treesize:92 [2021-01-06 11:26:03,708 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2021-01-06 11:26:03,709 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2021-01-06 11:26:03,710 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2021-01-06 11:26:03,716 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:03,862 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-01-06 11:26:03,863 INFO L625 ElimStorePlain]: treesize reduction 118, result has 43.5 percent of original size [2021-01-06 11:26:03,865 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:03,865 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:91 [2021-01-06 11:26:04,862 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2021-01-06 11:26:04,863 INFO L348 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2021-01-06 11:26:04,863 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 293 [2021-01-06 11:26:04,870 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:05,032 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-01-06 11:26:05,033 INFO L625 ElimStorePlain]: treesize reduction 24, result has 81.0 percent of original size [2021-01-06 11:26:05,035 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:05,035 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:127, output treesize:102 [2021-01-06 11:26:05,452 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-01-06 11:26:06,190 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2021-01-06 11:26:06,192 INFO L348 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2021-01-06 11:26:06,192 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 293 [2021-01-06 11:26:06,199 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:06,355 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-01-06 11:26:06,356 INFO L625 ElimStorePlain]: treesize reduction 20, result has 83.1 percent of original size [2021-01-06 11:26:06,357 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:06,358 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:127, output treesize:98 [2021-01-06 11:26:06,819 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-01-06 11:26:07,284 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2021-01-06 11:26:07,285 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2021-01-06 11:26:07,285 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2021-01-06 11:26:07,290 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:07,422 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-01-06 11:26:07,423 INFO L625 ElimStorePlain]: treesize reduction 72, result has 55.8 percent of original size [2021-01-06 11:26:07,427 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:07,428 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:106, output treesize:91 [2021-01-06 11:26:07,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:26:07,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:26:07,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:26:07,811 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:26:07,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:26:07,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 11:26:07,824 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2021-01-06 11:26:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:08,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:26:08,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 56 [2021-01-06 11:26:08,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144758475] [2021-01-06 11:26:08,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 11:26:08,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:26:08,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 11:26:08,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2900, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 11:26:08,022 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 56 states. [2021-01-06 11:26:10,046 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-01-06 11:26:10,354 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-01-06 11:26:10,725 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-06 11:26:11,364 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-01-06 11:26:11,895 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 11:26:12,478 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 11:26:13,022 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-01-06 11:26:13,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:26:13,946 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-01-06 11:26:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 11:26:13,947 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 41 [2021-01-06 11:26:13,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:26:13,948 INFO L225 Difference]: With dead ends: 90 [2021-01-06 11:26:13,948 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 11:26:13,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=261, Invalid=4029, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 11:26:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 11:26:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-01-06 11:26:13,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 11:26:13,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-01-06 11:26:13,964 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 41 [2021-01-06 11:26:13,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:26:13,964 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-01-06 11:26:13,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 11:26:13,964 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-01-06 11:26:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 11:26:13,965 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:26:13,965 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:26:14,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 11:26:14,165 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:26:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:26:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash 127479307, now seen corresponding path program 5 times [2021-01-06 11:26:14,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:26:14,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762246691] [2021-01-06 11:26:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:26:14,178 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:26:14,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658213810] [2021-01-06 11:26:14,178 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:26:14,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 11:26:14,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:26:14,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 11:26:14,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:26:14,423 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:26:14,424 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:14,437 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:14,437 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:14,438 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-01-06 11:26:14,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:14,514 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-01-06 11:26:14,516 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:14,538 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:14,540 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:14,541 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:30 [2021-01-06 11:26:14,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:14,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:14,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:14,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:14,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:14,747 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:14,748 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 101 [2021-01-06 11:26:14,752 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:26:14,760 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:14,861 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-01-06 11:26:14,863 INFO L625 ElimStorePlain]: treesize reduction 45, result has 55.0 percent of original size [2021-01-06 11:26:14,866 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:14,866 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:55 [2021-01-06 11:26:15,366 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-01-06 11:26:15,475 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 11:26:15,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,541 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2021-01-06 11:26:15,544 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:15,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,617 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:15,617 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 47 [2021-01-06 11:26:15,620 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:15,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:15,649 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:15,650 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 52 [2021-01-06 11:26:15,652 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:15,759 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-01-06 11:26:15,760 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:15,763 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-01-06 11:26:15,764 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:198, output treesize:133 [2021-01-06 11:26:16,702 WARN L197 SmtUtils]: Spent 864.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-01-06 11:26:16,942 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-01-06 11:26:16,961 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 11:26:16,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:16,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:16,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,055 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:17,055 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 47 [2021-01-06 11:26:17,057 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:17,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,125 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2021-01-06 11:26:17,129 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:17,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,165 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:17,166 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 66 [2021-01-06 11:26:17,171 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:17,306 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-01-06 11:26:17,307 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:17,310 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-01-06 11:26:17,311 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:209, output treesize:143 [2021-01-06 11:26:17,550 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-01-06 11:26:17,788 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-01-06 11:26:17,822 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 11:26:17,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,924 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:17,924 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 47 [2021-01-06 11:26:17,927 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:17,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,984 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2021-01-06 11:26:17,987 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:17,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:17,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,030 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:18,030 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 79 [2021-01-06 11:26:18,033 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:18,144 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-01-06 11:26:18,145 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:18,152 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 3 xjuncts. [2021-01-06 11:26:18,152 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:219, output treesize:133 [2021-01-06 11:26:18,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:18,423 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:18,423 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2021-01-06 11:26:18,426 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:18,434 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:18,436 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:18,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:36, output treesize:3 [2021-01-06 11:26:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 11:26:18,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762246691] [2021-01-06 11:26:18,526 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:26:18,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658213810] [2021-01-06 11:26:18,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:26:18,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-01-06 11:26:18,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84475203] [2021-01-06 11:26:18,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 11:26:18,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:26:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 11:26:18,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:26:18,528 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 20 states. [2021-01-06 11:26:20,240 WARN L197 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-01-06 11:26:20,596 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-01-06 11:26:20,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:26:20,826 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-01-06 11:26:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 11:26:20,828 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2021-01-06 11:26:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:26:20,829 INFO L225 Difference]: With dead ends: 81 [2021-01-06 11:26:20,829 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 11:26:20,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:26:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 11:26:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2021-01-06 11:26:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 11:26:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-01-06 11:26:20,845 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 41 [2021-01-06 11:26:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:26:20,846 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-01-06 11:26:20,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 11:26:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-01-06 11:26:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 11:26:20,846 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:26:20,847 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:26:21,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 11:26:21,055 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:26:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:26:21,057 INFO L82 PathProgramCache]: Analyzing trace with hash -105011125, now seen corresponding path program 17 times [2021-01-06 11:26:21,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:26:21,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107707663] [2021-01-06 11:26:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:26:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:26:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:21,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107707663] [2021-01-06 11:26:21,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279512029] [2021-01-06 11:26:21,364 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:26:21,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 11:26:21,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:26:21,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:26:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:26:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:21,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:26:21,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-01-06 11:26:21,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448629403] [2021-01-06 11:26:21,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:26:21,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:26:21,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:26:21,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:26:21,862 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 25 states. [2021-01-06 11:26:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:26:23,101 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-01-06 11:26:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 11:26:23,103 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2021-01-06 11:26:23,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:26:23,104 INFO L225 Difference]: With dead ends: 78 [2021-01-06 11:26:23,104 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 11:26:23,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 11:26:23,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 11:26:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2021-01-06 11:26:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 11:26:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-01-06 11:26:23,117 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 43 [2021-01-06 11:26:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:26:23,117 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-01-06 11:26:23,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:26:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-01-06 11:26:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 11:26:23,118 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:26:23,118 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:26:23,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:26:23,332 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:26:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:26:23,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2029167523, now seen corresponding path program 18 times [2021-01-06 11:26:23,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:26:23,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344512039] [2021-01-06 11:26:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:26:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:26:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:23,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344512039] [2021-01-06 11:26:23,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830173810] [2021-01-06 11:26:23,646 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:26:23,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 11:26:23,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:26:23,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:26:23,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:26:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:24,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:26:24,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-01-06 11:26:24,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383243068] [2021-01-06 11:26:24,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:26:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:26:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:26:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:26:24,208 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 25 states. [2021-01-06 11:26:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:26:24,717 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2021-01-06 11:26:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:26:24,719 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2021-01-06 11:26:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:26:24,720 INFO L225 Difference]: With dead ends: 82 [2021-01-06 11:26:24,720 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 11:26:24,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2021-01-06 11:26:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 11:26:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-01-06 11:26:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 11:26:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-01-06 11:26:24,734 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 44 [2021-01-06 11:26:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:26:24,734 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-01-06 11:26:24,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:26:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-01-06 11:26:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 11:26:24,735 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:26:24,735 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:26:24,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 11:26:24,937 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:26:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:26:24,938 INFO L82 PathProgramCache]: Analyzing trace with hash -111213349, now seen corresponding path program 19 times [2021-01-06 11:26:24,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:26:24,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342962640] [2021-01-06 11:26:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:26:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:26:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:28,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342962640] [2021-01-06 11:26:28,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428900109] [2021-01-06 11:26:28,298 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:26:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:26:28,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 11:26:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:26:28,588 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 11 treesize of output 7 [2021-01-06 11:26:28,589 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:28,604 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:28,604 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:28,605 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:26:28,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:28,748 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-01-06 11:26:28,750 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:28,774 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:28,776 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:28,776 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2021-01-06 11:26:29,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:29,098 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-01-06 11:26:29,099 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-01-06 11:26:29,101 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:29,127 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:29,129 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:29,129 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2021-01-06 11:26:29,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:29,592 INFO L348 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2021-01-06 11:26:29,592 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2021-01-06 11:26:29,597 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:29,700 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-01-06 11:26:29,701 INFO L625 ElimStorePlain]: treesize reduction 42, result has 52.3 percent of original size [2021-01-06 11:26:29,702 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:29,703 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-01-06 11:26:30,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:30,215 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-01-06 11:26:30,216 INFO L348 Elim1Store]: treesize reduction 77, result has 51.9 percent of original size [2021-01-06 11:26:30,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 113 [2021-01-06 11:26:30,220 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:30,343 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-01-06 11:26:30,344 INFO L625 ElimStorePlain]: treesize reduction 42, result has 58.0 percent of original size [2021-01-06 11:26:30,345 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:30,345 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:58 [2021-01-06 11:26:30,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:31,068 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-01-06 11:26:31,069 INFO L348 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2021-01-06 11:26:31,069 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 182 [2021-01-06 11:26:31,075 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:31,280 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-01-06 11:26:31,281 INFO L625 ElimStorePlain]: treesize reduction 86, result has 42.7 percent of original size [2021-01-06 11:26:31,283 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:31,284 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2021-01-06 11:26:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:32,084 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2021-01-06 11:26:32,085 INFO L348 Elim1Store]: treesize reduction 163, result has 49.7 percent of original size [2021-01-06 11:26:32,085 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 197 [2021-01-06 11:26:32,090 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:32,281 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-01-06 11:26:32,282 INFO L625 ElimStorePlain]: treesize reduction 86, result has 46.9 percent of original size [2021-01-06 11:26:32,283 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:32,284 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2021-01-06 11:26:32,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:33,272 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 57 [2021-01-06 11:26:33,273 INFO L348 Elim1Store]: treesize reduction 278, result has 38.4 percent of original size [2021-01-06 11:26:33,274 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 212 [2021-01-06 11:26:33,280 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:33,549 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-01-06 11:26:33,550 INFO L625 ElimStorePlain]: treesize reduction 86, result has 51.4 percent of original size [2021-01-06 11:26:33,552 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:33,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:95, output treesize:91 [2021-01-06 11:26:35,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:35,315 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2021-01-06 11:26:35,316 INFO L348 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2021-01-06 11:26:35,316 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 205 [2021-01-06 11:26:35,322 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:35,520 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-01-06 11:26:35,521 INFO L625 ElimStorePlain]: treesize reduction 70, result has 58.6 percent of original size [2021-01-06 11:26:35,523 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:35,524 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:116, output treesize:99 [2021-01-06 11:26:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:36,918 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2021-01-06 11:26:36,919 INFO L348 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2021-01-06 11:26:36,920 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 124 treesize of output 331 [2021-01-06 11:26:36,929 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:37,195 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2021-01-06 11:26:37,196 INFO L625 ElimStorePlain]: treesize reduction 242, result has 34.2 percent of original size [2021-01-06 11:26:37,198 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:37,198 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:135, output treesize:126 [2021-01-06 11:26:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:39,062 WARN L197 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 129 [2021-01-06 11:26:39,064 INFO L348 Elim1Store]: treesize reduction 240, result has 58.4 percent of original size [2021-01-06 11:26:39,065 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 151 treesize of output 477 [2021-01-06 11:26:39,080 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:39,411 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2021-01-06 11:26:39,412 INFO L625 ElimStorePlain]: treesize reduction 300, result has 31.8 percent of original size [2021-01-06 11:26:39,416 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:39,416 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:162, output treesize:140 [2021-01-06 11:26:40,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:41,728 WARN L197 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 257 DAG size of output: 173 [2021-01-06 11:26:41,729 INFO L348 Elim1Store]: treesize reduction 240, result has 66.7 percent of original size [2021-01-06 11:26:41,730 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 165 treesize of output 634 [2021-01-06 11:26:41,743 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:42,004 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2021-01-06 11:26:42,005 INFO L625 ElimStorePlain]: treesize reduction 138, result has 51.9 percent of original size [2021-01-06 11:26:42,008 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:42,008 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:176, output treesize:149 [2021-01-06 11:26:42,687 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-01-06 11:26:43,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:44,156 WARN L197 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 129 [2021-01-06 11:26:44,157 INFO L348 Elim1Store]: treesize reduction 240, result has 58.4 percent of original size [2021-01-06 11:26:44,157 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 152 treesize of output 478 [2021-01-06 11:26:44,174 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:44,502 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 62 [2021-01-06 11:26:44,503 INFO L625 ElimStorePlain]: treesize reduction 366, result has 27.8 percent of original size [2021-01-06 11:26:44,505 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:44,506 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:141 [2021-01-06 11:26:45,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:46,916 WARN L197 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 257 DAG size of output: 173 [2021-01-06 11:26:46,917 INFO L348 Elim1Store]: treesize reduction 240, result has 66.7 percent of original size [2021-01-06 11:26:46,918 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 166 treesize of output 635 [2021-01-06 11:26:46,934 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:47,247 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 68 [2021-01-06 11:26:47,250 INFO L625 ElimStorePlain]: treesize reduction 360, result has 31.7 percent of original size [2021-01-06 11:26:47,255 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:47,255 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:177, output treesize:167 [2021-01-06 11:26:48,036 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-01-06 11:26:48,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:49,959 WARN L197 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 257 DAG size of output: 173 [2021-01-06 11:26:49,960 INFO L348 Elim1Store]: treesize reduction 240, result has 66.7 percent of original size [2021-01-06 11:26:49,960 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 181 treesize of output 638 [2021-01-06 11:26:49,976 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:50,333 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 67 [2021-01-06 11:26:50,334 INFO L625 ElimStorePlain]: treesize reduction 216, result has 39.8 percent of original size [2021-01-06 11:26:50,341 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:50,341 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:192, output treesize:143 [2021-01-06 11:26:50,792 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:26:50,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:26:50,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:26:50,797 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:26:50,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:26:50,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2021-01-06 11:26:50,826 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 16 disjuncts [2021-01-06 11:26:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:51,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:26:51,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2021-01-06 11:26:51,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829991922] [2021-01-06 11:26:51,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 11:26:51,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:26:51,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 11:26:51,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=4307, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 11:26:51,042 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 68 states. [2021-01-06 11:26:53,474 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-01-06 11:26:53,756 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-01-06 11:26:54,182 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-01-06 11:26:54,464 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-01-06 11:26:54,925 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-01-06 11:26:55,268 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-01-06 11:26:55,649 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-01-06 11:26:56,344 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-01-06 11:26:56,748 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-01-06 11:26:57,249 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-01-06 11:26:57,669 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 11:26:58,146 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-01-06 11:26:58,804 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-01-06 11:26:59,277 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-01-06 11:26:59,894 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-01-06 11:27:00,547 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-01-06 11:27:01,064 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-01-06 11:27:01,707 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-01-06 11:27:02,417 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-01-06 11:27:02,925 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-01-06 11:27:03,516 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-01-06 11:27:04,358 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2021-01-06 11:27:04,874 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-01-06 11:27:05,497 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-01-06 11:27:06,220 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-01-06 11:27:07,038 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-01-06 11:27:07,761 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-01-06 11:27:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:27:08,806 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2021-01-06 11:27:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 11:27:08,807 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 46 [2021-01-06 11:27:08,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:27:08,808 INFO L225 Difference]: With dead ends: 101 [2021-01-06 11:27:08,808 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 11:27:08,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=675, Invalid=10881, Unknown=0, NotChecked=0, Total=11556 [2021-01-06 11:27:08,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 11:27:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2021-01-06 11:27:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 11:27:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-01-06 11:27:08,830 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 46 [2021-01-06 11:27:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:27:08,830 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-01-06 11:27:08,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 11:27:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-01-06 11:27:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 11:27:08,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:27:08,830 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:27:09,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:27:09,032 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:27:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:27:09,033 INFO L82 PathProgramCache]: Analyzing trace with hash 568845021, now seen corresponding path program 6 times [2021-01-06 11:27:09,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:27:09,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749219891] [2021-01-06 11:27:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:27:09,050 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:27:09,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705909361] [2021-01-06 11:27:09,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:27:09,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 11:27:09,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:27:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 11:27:09,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:27:09,279 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:27:09,280 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:09,292 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:27:09,293 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:09,293 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 11:27:09,358 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-01-06 11:27:09,359 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-01-06 11:27:09,361 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:09,379 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:27:09,380 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:09,380 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-01-06 11:27:09,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:09,578 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:27:09,579 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2021-01-06 11:27:09,581 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:09,627 INFO L625 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2021-01-06 11:27:09,628 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:09,629 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2021-01-06 11:27:09,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:09,698 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:27:09,698 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2021-01-06 11:27:09,701 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:09,750 INFO L625 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2021-01-06 11:27:09,751 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:09,752 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2021-01-06 11:27:09,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:09,821 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:27:09,822 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2021-01-06 11:27:09,824 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:09,872 INFO L625 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2021-01-06 11:27:09,873 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:09,874 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2021-01-06 11:27:09,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:09,937 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:27:09,937 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2021-01-06 11:27:09,940 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:09,981 INFO L625 ElimStorePlain]: treesize reduction 59, result has 38.5 percent of original size [2021-01-06 11:27:09,983 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:09,983 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2021-01-06 11:27:10,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:10,054 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:27:10,055 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2021-01-06 11:27:10,057 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:10,097 INFO L625 ElimStorePlain]: treesize reduction 51, result has 42.0 percent of original size [2021-01-06 11:27:10,099 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:10,099 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:32 [2021-01-06 11:27:10,186 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:27:10,186 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-01-06 11:27:10,189 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:10,218 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:27:10,220 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:27:10,220 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:27:10,222 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:27:10,224 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-01-06 11:27:10,224 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:56 [2021-01-06 11:27:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 11:27:10,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749219891] [2021-01-06 11:27:10,400 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:27:10,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705909361] [2021-01-06 11:27:10,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:27:10,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 11:27:10,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132548513] [2021-01-06 11:27:10,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 11:27:10,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:27:10,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 11:27:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:27:10,402 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 14 states. [2021-01-06 11:27:11,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:27:11,261 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-01-06 11:27:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:27:11,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2021-01-06 11:27:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:27:11,264 INFO L225 Difference]: With dead ends: 81 [2021-01-06 11:27:11,264 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 11:27:11,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:27:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 11:27:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2021-01-06 11:27:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 11:27:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-01-06 11:27:11,283 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 46 [2021-01-06 11:27:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:27:11,283 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-01-06 11:27:11,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 11:27:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-01-06 11:27:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 11:27:11,284 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:27:11,284 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:27:11,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 11:27:11,496 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:27:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:27:11,496 INFO L82 PathProgramCache]: Analyzing trace with hash 501777881, now seen corresponding path program 20 times [2021-01-06 11:27:11,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:27:11,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415369014] [2021-01-06 11:27:11,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:27:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:27:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:27:11,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415369014] [2021-01-06 11:27:11,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414446813] [2021-01-06 11:27:11,887 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:27:11,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:27:11,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:27:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:27:11,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:27:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:27:12,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:27:12,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-01-06 11:27:12,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718150309] [2021-01-06 11:27:12,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 11:27:12,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:27:12,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 11:27:12,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-01-06 11:27:12,345 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 28 states. [2021-01-06 11:27:13,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:27:13,952 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2021-01-06 11:27:13,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 11:27:13,956 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2021-01-06 11:27:13,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:27:13,957 INFO L225 Difference]: With dead ends: 98 [2021-01-06 11:27:13,957 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 11:27:13,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 11:27:13,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 11:27:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2021-01-06 11:27:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 11:27:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-01-06 11:27:13,975 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 48 [2021-01-06 11:27:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:27:13,976 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-01-06 11:27:13,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 11:27:13,976 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-01-06 11:27:13,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 11:27:13,976 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:27:13,976 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:27:14,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 11:27:14,177 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:27:14,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:27:14,178 INFO L82 PathProgramCache]: Analyzing trace with hash -198074805, now seen corresponding path program 21 times [2021-01-06 11:27:14,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:27:14,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667002626] [2021-01-06 11:27:14,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:27:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:27:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:27:14,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667002626] [2021-01-06 11:27:14,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556192950] [2021-01-06 11:27:14,528 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:27:14,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 11:27:14,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:27:14,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:27:14,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:27:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:27:15,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:27:15,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-01-06 11:27:15,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515003673] [2021-01-06 11:27:15,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 11:27:15,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:27:15,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 11:27:15,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-01-06 11:27:15,133 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 28 states. [2021-01-06 11:27:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:27:15,748 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2021-01-06 11:27:15,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:27:15,750 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 49 [2021-01-06 11:27:15,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:27:15,751 INFO L225 Difference]: With dead ends: 102 [2021-01-06 11:27:15,752 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 11:27:15,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:27:15,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 11:27:15,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2021-01-06 11:27:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 11:27:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-01-06 11:27:15,768 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 49 [2021-01-06 11:27:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:27:15,768 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-01-06 11:27:15,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 11:27:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-01-06 11:27:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 11:27:15,768 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:27:15,769 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:27:15,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 11:27:15,969 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:27:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:27:15,970 INFO L82 PathProgramCache]: Analyzing trace with hash -777284467, now seen corresponding path program 22 times [2021-01-06 11:27:15,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:27:15,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136313556] [2021-01-06 11:27:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:27:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:27:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:27:18,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136313556] [2021-01-06 11:27:18,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712200178] [2021-01-06 11:27:18,982 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:27:19,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:27:19,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:27:19,052 WARN L261 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 11:27:19,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:27:19,070 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 10 treesize of output 8 [2021-01-06 11:27:19,073 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:19,083 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:27:19,088 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 11 treesize of output 7 [2021-01-06 11:27:19,090 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:19,099 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:27:19,100 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:19,101 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-01-06 11:27:19,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:19,123 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-01-06 11:27:19,124 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:19,142 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:27:19,143 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:19,144 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2021-01-06 11:27:19,405 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-01-06 11:27:19,406 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-01-06 11:27:19,408 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:19,431 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:27:19,432 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:19,433 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2021-01-06 11:27:19,860 INFO L348 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2021-01-06 11:27:19,860 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2021-01-06 11:27:19,863 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:19,956 INFO L625 ElimStorePlain]: treesize reduction 42, result has 50.0 percent of original size [2021-01-06 11:27:19,957 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:19,957 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2021-01-06 11:27:20,467 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-01-06 11:27:20,468 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2021-01-06 11:27:20,468 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2021-01-06 11:27:20,471 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:20,604 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-01-06 11:27:20,605 INFO L625 ElimStorePlain]: treesize reduction 64, result has 44.3 percent of original size [2021-01-06 11:27:20,606 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:20,606 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2021-01-06 11:27:21,321 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-01-06 11:27:21,322 INFO L348 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2021-01-06 11:27:21,322 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 182 [2021-01-06 11:27:21,325 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:21,483 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-01-06 11:27:21,484 INFO L625 ElimStorePlain]: treesize reduction 86, result has 41.1 percent of original size [2021-01-06 11:27:21,485 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:21,485 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:60 [2021-01-06 11:27:22,512 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2021-01-06 11:27:22,513 INFO L348 Elim1Store]: treesize reduction 112, result has 62.7 percent of original size [2021-01-06 11:27:22,514 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 224 [2021-01-06 11:27:22,519 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:22,729 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-01-06 11:27:22,730 INFO L625 ElimStorePlain]: treesize reduction 108, result has 39.0 percent of original size [2021-01-06 11:27:22,731 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:22,732 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:69 [2021-01-06 11:27:23,997 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 62 [2021-01-06 11:27:23,998 INFO L348 Elim1Store]: treesize reduction 224, result has 47.2 percent of original size [2021-01-06 11:27:23,999 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 239 [2021-01-06 11:27:24,003 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:24,260 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-01-06 11:27:24,261 INFO L625 ElimStorePlain]: treesize reduction 108, result has 42.9 percent of original size [2021-01-06 11:27:24,262 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:24,263 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:85, output treesize:81 [2021-01-06 11:27:25,715 WARN L197 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 77 [2021-01-06 11:27:25,716 INFO L348 Elim1Store]: treesize reduction 240, result has 52.6 percent of original size [2021-01-06 11:27:25,716 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 308 [2021-01-06 11:27:25,721 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:26,032 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-01-06 11:27:26,033 INFO L625 ElimStorePlain]: treesize reduction 152, result has 37.2 percent of original size [2021-01-06 11:27:26,034 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:26,034 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:90 [2021-01-06 11:27:28,360 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-01-06 11:27:28,611 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2021-01-06 11:27:28,612 INFO L348 Elim1Store]: treesize reduction 322, result has 25.6 percent of original size [2021-01-06 11:27:28,612 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 231 [2021-01-06 11:27:28,619 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:28,859 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-01-06 11:27:28,860 INFO L625 ElimStorePlain]: treesize reduction 94, result has 53.2 percent of original size [2021-01-06 11:27:28,861 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:28,862 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:124, output treesize:107 [2021-01-06 11:27:30,206 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-01-06 11:27:30,752 WARN L197 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 100 [2021-01-06 11:27:30,753 INFO L348 Elim1Store]: treesize reduction 322, result has 42.4 percent of original size [2021-01-06 11:27:30,754 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 133 treesize of output 371 [2021-01-06 11:27:30,764 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:31,050 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2021-01-06 11:27:31,051 INFO L625 ElimStorePlain]: treesize reduction 130, result has 50.8 percent of original size [2021-01-06 11:27:31,053 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:31,053 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:143, output treesize:134 [2021-01-06 11:27:32,457 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-01-06 11:27:33,291 WARN L197 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 144 [2021-01-06 11:27:33,293 INFO L348 Elim1Store]: treesize reduction 322, result has 54.1 percent of original size [2021-01-06 11:27:33,293 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 160 treesize of output 531 [2021-01-06 11:27:33,304 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:33,594 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2021-01-06 11:27:33,595 INFO L625 ElimStorePlain]: treesize reduction 108, result has 54.0 percent of original size [2021-01-06 11:27:33,596 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:33,596 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:170, output treesize:127 [2021-01-06 11:27:36,778 WARN L197 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-01-06 11:27:37,663 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-01-06 11:27:37,900 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2021-01-06 11:27:37,901 INFO L348 Elim1Store]: treesize reduction 322, result has 25.6 percent of original size [2021-01-06 11:27:37,902 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 231 [2021-01-06 11:27:37,909 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:38,157 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-01-06 11:27:38,158 INFO L625 ElimStorePlain]: treesize reduction 70, result has 60.9 percent of original size [2021-01-06 11:27:38,159 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:38,160 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:124, output treesize:109 [2021-01-06 11:27:39,853 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-01-06 11:27:40,435 WARN L197 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 100 [2021-01-06 11:27:40,437 INFO L348 Elim1Store]: treesize reduction 322, result has 42.4 percent of original size [2021-01-06 11:27:40,437 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 135 treesize of output 373 [2021-01-06 11:27:40,446 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:40,772 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-01-06 11:27:40,773 INFO L625 ElimStorePlain]: treesize reduction 96, result has 55.6 percent of original size [2021-01-06 11:27:40,774 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:40,775 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:145, output treesize:120 [2021-01-06 11:27:41,734 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-01-06 11:27:42,601 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-01-06 11:27:43,149 WARN L197 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 100 [2021-01-06 11:27:43,150 INFO L348 Elim1Store]: treesize reduction 322, result has 42.4 percent of original size [2021-01-06 11:27:43,151 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 135 treesize of output 373 [2021-01-06 11:27:43,159 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:43,502 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2021-01-06 11:27:43,503 INFO L625 ElimStorePlain]: treesize reduction 138, result has 49.5 percent of original size [2021-01-06 11:27:43,504 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:43,504 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:145, output treesize:135 [2021-01-06 11:27:45,282 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-01-06 11:27:46,199 WARN L197 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 144 [2021-01-06 11:27:46,200 INFO L348 Elim1Store]: treesize reduction 322, result has 54.1 percent of original size [2021-01-06 11:27:46,200 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 161 treesize of output 532 [2021-01-06 11:27:46,214 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:46,578 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2021-01-06 11:27:46,579 INFO L625 ElimStorePlain]: treesize reduction 220, result has 38.9 percent of original size [2021-01-06 11:27:46,582 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:46,582 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:171, output treesize:140 [2021-01-06 11:27:47,651 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-01-06 11:27:48,640 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-01-06 11:27:49,579 WARN L197 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 144 [2021-01-06 11:27:49,580 INFO L348 Elim1Store]: treesize reduction 322, result has 54.1 percent of original size [2021-01-06 11:27:49,581 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 155 treesize of output 530 [2021-01-06 11:27:49,592 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:49,948 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-01-06 11:27:49,949 INFO L625 ElimStorePlain]: treesize reduction 118, result has 52.6 percent of original size [2021-01-06 11:27:49,953 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:49,953 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:165, output treesize:131 [2021-01-06 11:27:50,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:27:50,692 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:27:50,693 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:27:50,695 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:27:50,705 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:27:50,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2021-01-06 11:27:50,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 16 disjuncts [2021-01-06 11:27:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:27:51,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:27:51,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 72 [2021-01-06 11:27:51,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960614977] [2021-01-06 11:27:51,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 11:27:51,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:27:51,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 11:27:51,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=4878, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 11:27:51,188 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 72 states. [2021-01-06 11:27:54,470 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-01-06 11:27:55,584 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-01-06 11:27:56,238 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-01-06 11:27:57,037 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-01-06 11:27:58,390 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-01-06 11:27:59,675 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-01-06 11:28:00,999 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-01-06 11:28:02,269 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-01-06 11:28:03,661 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-01-06 11:28:05,489 WARN L197 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-01-06 11:28:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:28:07,333 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2021-01-06 11:28:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 11:28:07,334 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 51 [2021-01-06 11:28:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:28:07,335 INFO L225 Difference]: With dead ends: 112 [2021-01-06 11:28:07,335 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 11:28:07,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=332, Invalid=6640, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 11:28:07,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 11:28:07,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-01-06 11:28:07,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 11:28:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-01-06 11:28:07,364 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 51 [2021-01-06 11:28:07,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:28:07,364 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-01-06 11:28:07,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 11:28:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-01-06 11:28:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 11:28:07,364 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:28:07,364 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:28:07,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:28:07,565 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:28:07,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:28:07,566 INFO L82 PathProgramCache]: Analyzing trace with hash -519119029, now seen corresponding path program 7 times [2021-01-06 11:28:07,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:28:07,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113838743] [2021-01-06 11:28:07,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:28:07,578 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:28:07,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578058323] [2021-01-06 11:28:07,578 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:28:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:28:07,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 11:28:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:28:07,677 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 10 treesize of output 8 [2021-01-06 11:28:07,681 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:07,689 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:07,690 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:07,691 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2021-01-06 11:28:07,850 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:28:07,851 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:07,881 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:07,883 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:07,883 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:28:08,011 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:08,013 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:28:08,015 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:08,079 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2021-01-06 11:28:08,080 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:08,080 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-01-06 11:28:08,303 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:08,304 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 118 [2021-01-06 11:28:08,306 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:08,399 INFO L625 ElimStorePlain]: treesize reduction 50, result has 46.8 percent of original size [2021-01-06 11:28:08,401 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:28:08,402 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:44 [2021-01-06 11:28:08,893 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:08,893 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2021-01-06 11:28:08,897 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:08,980 INFO L625 ElimStorePlain]: treesize reduction 66, result has 41.6 percent of original size [2021-01-06 11:28:08,983 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:28:08,983 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2021-01-06 11:28:09,242 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:09,243 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2021-01-06 11:28:09,250 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:09,333 INFO L625 ElimStorePlain]: treesize reduction 64, result has 42.3 percent of original size [2021-01-06 11:28:09,335 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:28:09,336 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2021-01-06 11:28:09,519 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:09,519 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2021-01-06 11:28:09,523 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:09,601 INFO L625 ElimStorePlain]: treesize reduction 66, result has 41.6 percent of original size [2021-01-06 11:28:09,603 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:28:09,604 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2021-01-06 11:28:09,783 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:09,784 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2021-01-06 11:28:09,788 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:09,871 INFO L625 ElimStorePlain]: treesize reduction 102, result has 31.5 percent of original size [2021-01-06 11:28:09,874 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:28:09,874 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2021-01-06 11:28:10,080 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:10,081 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2021-01-06 11:28:10,085 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:10,166 INFO L625 ElimStorePlain]: treesize reduction 102, result has 31.5 percent of original size [2021-01-06 11:28:10,169 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:28:10,169 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:43 [2021-01-06 11:28:10,391 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:10,391 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-01-06 11:28:10,393 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:10,404 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:10,406 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:10,406 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:3 [2021-01-06 11:28:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 46 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 11:28:10,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113838743] [2021-01-06 11:28:10,488 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:28:10,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578058323] [2021-01-06 11:28:10,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:28:10,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-01-06 11:28:10,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899331795] [2021-01-06 11:28:10,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 11:28:10,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:28:10,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 11:28:10,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:28:10,490 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 21 states. [2021-01-06 11:28:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:28:12,832 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2021-01-06 11:28:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 11:28:12,835 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2021-01-06 11:28:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:28:12,836 INFO L225 Difference]: With dead ends: 88 [2021-01-06 11:28:12,836 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 11:28:12,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:28:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 11:28:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-01-06 11:28:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 11:28:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-01-06 11:28:12,860 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 51 [2021-01-06 11:28:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:28:12,860 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-01-06 11:28:12,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 11:28:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-01-06 11:28:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 11:28:12,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:28:12,861 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:28:13,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 11:28:13,077 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:28:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:28:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash 947978831, now seen corresponding path program 23 times [2021-01-06 11:28:13,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:28:13,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355638229] [2021-01-06 11:28:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:28:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:28:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 49 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:28:13,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355638229] [2021-01-06 11:28:13,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239423293] [2021-01-06 11:28:13,668 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:28:13,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 11:28:13,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:28:13,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 11:28:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:28:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 64 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:28:14,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:28:14,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-01-06 11:28:14,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188194679] [2021-01-06 11:28:14,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 11:28:14,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:28:14,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 11:28:14,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:28:14,537 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 31 states. [2021-01-06 11:28:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:28:17,262 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2021-01-06 11:28:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 11:28:17,265 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 53 [2021-01-06 11:28:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:28:17,266 INFO L225 Difference]: With dead ends: 106 [2021-01-06 11:28:17,267 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 11:28:17,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=526, Invalid=1826, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 11:28:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 11:28:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 60. [2021-01-06 11:28:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 11:28:17,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-01-06 11:28:17,287 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 53 [2021-01-06 11:28:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:28:17,287 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-01-06 11:28:17,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 11:28:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-01-06 11:28:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 11:28:17,288 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:28:17,288 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:28:17,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:28:17,502 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:28:17,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:28:17,503 INFO L82 PathProgramCache]: Analyzing trace with hash -373843623, now seen corresponding path program 24 times [2021-01-06 11:28:17,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:28:17,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491012519] [2021-01-06 11:28:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:28:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:28:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 95 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:28:18,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491012519] [2021-01-06 11:28:18,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577265498] [2021-01-06 11:28:18,084 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:28:18,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 11:28:18,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:28:18,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 11:28:18,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:28:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:28:19,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:28:19,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-01-06 11:28:19,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882050624] [2021-01-06 11:28:19,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 11:28:19,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:28:19,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 11:28:19,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:28:19,001 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 31 states. [2021-01-06 11:28:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:28:19,954 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2021-01-06 11:28:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 11:28:19,956 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 54 [2021-01-06 11:28:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:28:19,957 INFO L225 Difference]: With dead ends: 110 [2021-01-06 11:28:19,957 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 11:28:19,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 11:28:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 11:28:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2021-01-06 11:28:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 11:28:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-01-06 11:28:19,977 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2021-01-06 11:28:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:28:19,977 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-01-06 11:28:19,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 11:28:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-01-06 11:28:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 11:28:19,977 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:28:19,977 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:28:20,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 11:28:20,191 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:28:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:28:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash -928564137, now seen corresponding path program 25 times [2021-01-06 11:28:20,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:28:20,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23281766] [2021-01-06 11:28:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:28:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:28:25,333 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-01-06 11:28:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:28:25,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23281766] [2021-01-06 11:28:25,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226082899] [2021-01-06 11:28:25,670 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:28:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:28:25,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 92 conjunts are in the unsatisfiable core [2021-01-06 11:28:25,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:28:26,084 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 11 treesize of output 7 [2021-01-06 11:28:26,085 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:26,103 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:26,104 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:26,105 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:28:26,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:26,304 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-01-06 11:28:26,306 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:26,334 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:26,336 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:26,336 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2021-01-06 11:28:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:26,784 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:26,784 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:28:26,788 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:26,867 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-01-06 11:28:26,868 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:26,868 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-01-06 11:28:27,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:27,580 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2021-01-06 11:28:27,581 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2021-01-06 11:28:27,584 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:27,726 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-01-06 11:28:27,727 INFO L625 ElimStorePlain]: treesize reduction 20, result has 71.0 percent of original size [2021-01-06 11:28:27,728 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:27,729 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2021-01-06 11:28:28,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:28,448 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-01-06 11:28:28,449 INFO L348 Elim1Store]: treesize reduction 122, result has 31.5 percent of original size [2021-01-06 11:28:28,449 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 86 [2021-01-06 11:28:28,453 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:28,618 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-01-06 11:28:28,619 INFO L625 ElimStorePlain]: treesize reduction 20, result has 75.3 percent of original size [2021-01-06 11:28:28,621 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:28,621 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:61 [2021-01-06 11:28:29,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:29,926 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-01-06 11:28:29,927 INFO L348 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2021-01-06 11:28:29,927 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 182 [2021-01-06 11:28:29,932 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:30,255 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-01-06 11:28:30,257 INFO L625 ElimStorePlain]: treesize reduction 86, result has 42.7 percent of original size [2021-01-06 11:28:30,258 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:30,258 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2021-01-06 11:28:31,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:31,926 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2021-01-06 11:28:31,927 INFO L348 Elim1Store]: treesize reduction 163, result has 49.7 percent of original size [2021-01-06 11:28:31,927 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 197 [2021-01-06 11:28:31,935 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:32,259 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-01-06 11:28:32,260 INFO L625 ElimStorePlain]: treesize reduction 86, result has 46.9 percent of original size [2021-01-06 11:28:32,261 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:32,261 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2021-01-06 11:28:33,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:34,126 WARN L197 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 67 [2021-01-06 11:28:34,128 INFO L348 Elim1Store]: treesize reduction 170, result has 57.2 percent of original size [2021-01-06 11:28:34,128 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 266 [2021-01-06 11:28:34,133 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:34,563 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-01-06 11:28:34,564 INFO L625 ElimStorePlain]: treesize reduction 130, result has 38.7 percent of original size [2021-01-06 11:28:34,565 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:34,565 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:86, output treesize:82 [2021-01-06 11:28:35,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:36,578 WARN L197 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 77 [2021-01-06 11:28:36,579 INFO L348 Elim1Store]: treesize reduction 240, result has 52.6 percent of original size [2021-01-06 11:28:36,579 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 308 [2021-01-06 11:28:36,584 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:37,019 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2021-01-06 11:28:37,020 INFO L625 ElimStorePlain]: treesize reduction 152, result has 37.4 percent of original size [2021-01-06 11:28:37,022 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:37,022 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:95, output treesize:91 [2021-01-06 11:28:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:39,300 WARN L197 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 87 [2021-01-06 11:28:39,301 INFO L348 Elim1Store]: treesize reduction 322, result has 48.6 percent of original size [2021-01-06 11:28:39,301 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 350 [2021-01-06 11:28:39,307 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:39,860 WARN L197 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2021-01-06 11:28:39,861 INFO L625 ElimStorePlain]: treesize reduction 174, result has 37.2 percent of original size [2021-01-06 11:28:39,862 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:28:39,863 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:103 [2021-01-06 11:28:40,667 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-01-06 11:28:41,461 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-01-06 11:28:42,460 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-01-06 11:28:43,588 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-01-06 11:28:43,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:43,983 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 67 [2021-01-06 11:28:43,985 INFO L348 Elim1Store]: treesize reduction 416, result has 23.1 percent of original size [2021-01-06 11:28:43,985 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 123 treesize of output 257 [2021-01-06 11:28:43,992 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:44,319 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-01-06 11:28:44,320 INFO L625 ElimStorePlain]: treesize reduction 98, result has 53.6 percent of original size [2021-01-06 11:28:44,321 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:28:44,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:134, output treesize:113 [2021-01-06 11:28:45,510 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-01-06 11:28:46,691 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-01-06 11:28:46,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:47,083 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 67 [2021-01-06 11:28:47,084 INFO L348 Elim1Store]: treesize reduction 416, result has 23.1 percent of original size [2021-01-06 11:28:47,084 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 123 treesize of output 257 [2021-01-06 11:28:47,091 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:47,309 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-01-06 11:28:47,310 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:28:47,311 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:28:47,311 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:134, output treesize:109 [2021-01-06 11:28:49,810 WARN L197 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 59 [2021-01-06 11:28:52,991 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 65 [2021-01-06 11:28:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:53,850 WARN L197 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 111 [2021-01-06 11:28:53,852 INFO L348 Elim1Store]: treesize reduction 416, result has 38.9 percent of original size [2021-01-06 11:28:53,852 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 134 treesize of output 411 [2021-01-06 11:28:53,863 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:54,385 WARN L197 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-01-06 11:28:54,386 INFO L625 ElimStorePlain]: treesize reduction 94, result has 58.0 percent of original size [2021-01-06 11:28:54,387 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:28:54,388 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:145, output treesize:130 [2021-01-06 11:28:55,823 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-01-06 11:28:57,215 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-01-06 11:28:57,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:58,176 WARN L197 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 111 [2021-01-06 11:28:58,177 INFO L348 Elim1Store]: treesize reduction 416, result has 38.9 percent of original size [2021-01-06 11:28:58,178 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 144 treesize of output 413 [2021-01-06 11:28:58,188 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:58,785 WARN L197 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2021-01-06 11:28:58,786 INFO L625 ElimStorePlain]: treesize reduction 193, result has 42.9 percent of original size [2021-01-06 11:28:58,789 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:28:58,789 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:155, output treesize:145 [2021-01-06 11:29:00,016 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-01-06 11:29:01,639 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-01-06 11:29:01,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:29:03,076 WARN L197 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2021-01-06 11:29:03,077 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2021-01-06 11:29:03,078 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 170 treesize of output 586 [2021-01-06 11:29:03,092 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:29:03,803 WARN L197 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2021-01-06 11:29:03,804 INFO L625 ElimStorePlain]: treesize reduction 172, result has 46.6 percent of original size [2021-01-06 11:29:03,807 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:29:03,807 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:181, output treesize:150 [2021-01-06 11:29:05,597 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-01-06 11:29:07,354 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-01-06 11:29:07,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:29:08,910 WARN L197 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2021-01-06 11:29:08,911 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2021-01-06 11:29:08,912 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 164 treesize of output 584 [2021-01-06 11:29:08,926 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:29:09,486 WARN L197 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 70 [2021-01-06 11:29:09,488 INFO L625 ElimStorePlain]: treesize reduction 248, result has 38.6 percent of original size [2021-01-06 11:29:09,495 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:29:09,495 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:175, output treesize:156