/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/reducercommutativity/sep05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:15:27,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:15:27,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:15:27,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:15:27,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:15:27,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:15:27,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:15:27,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:15:27,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:15:27,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:15:27,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:15:27,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:15:27,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:15:27,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:15:27,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:15:27,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:15:27,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:15:27,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:15:27,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:15:27,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:15:27,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:15:27,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:15:27,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:15:27,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:15:27,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:15:27,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:15:27,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:15:27,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:15:27,195 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:15:27,229 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:15:27,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:15:27,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:15:27,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:15:27,232 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:15:27,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:15:27,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:15:27,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:15:27,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:15:27,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:15:27,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:15:27,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:15:27,234 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:15:27,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:15:27,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:15:27,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:15:27,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:15:27,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:15:27,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:15:27,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:15:27,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:15:27,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:15:27,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:15:27,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:15:27,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:15:27,238 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:15:27,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:15:27,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:15:27,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:15:27,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:15:27,770 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:15:27,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep05-1.i [2021-01-06 10:15:27,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7beb6ed1e/f0813903ee874343830ed1970d270a14/FLAGdfc99d167 [2021-01-06 10:15:28,537 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:15:28,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep05-1.i [2021-01-06 10:15:28,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7beb6ed1e/f0813903ee874343830ed1970d270a14/FLAGdfc99d167 [2021-01-06 10:15:28,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7beb6ed1e/f0813903ee874343830ed1970d270a14 [2021-01-06 10:15:28,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:15:28,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:15:28,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:15:28,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:15:28,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:15:28,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:15:28" (1/1) ... [2021-01-06 10:15:28,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a57e64d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:28, skipping insertion in model container [2021-01-06 10:15:28,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:15:28" (1/1) ... [2021-01-06 10:15:28,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:15:28,990 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[4]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:15:29,177 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/reducercommutativity/sep05-1.i[1287,1300] [2021-01-06 10:15:29,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:15:29,197 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[16],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:15:29,232 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/reducercommutativity/sep05-1.i[1287,1300] [2021-01-06 10:15:29,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:15:29,255 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:15:29,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29 WrapperNode [2021-01-06 10:15:29,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:15:29,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:15:29,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:15:29,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:15:29,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29" (1/1) ... [2021-01-06 10:15:29,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29" (1/1) ... [2021-01-06 10:15:29,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:15:29,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:15:29,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:15:29,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:15:29,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29" (1/1) ... [2021-01-06 10:15:29,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29" (1/1) ... [2021-01-06 10:15:29,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29" (1/1) ... [2021-01-06 10:15:29,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29" (1/1) ... [2021-01-06 10:15:29,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29" (1/1) ... [2021-01-06 10:15:29,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29" (1/1) ... [2021-01-06 10:15:29,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29" (1/1) ... [2021-01-06 10:15:29,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:15:29,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:15:29,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:15:29,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:15:29,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:15:29,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:15:29,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:15:29,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:15:29,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:15:29,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:15:29,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:15:29,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:15:30,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:15:30,245 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 10:15:30,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:15:30 BoogieIcfgContainer [2021-01-06 10:15:30,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:15:30,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:15:30,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:15:30,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:15:30,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:15:28" (1/3) ... [2021-01-06 10:15:30,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251e5f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:15:30, skipping insertion in model container [2021-01-06 10:15:30,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:29" (2/3) ... [2021-01-06 10:15:30,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251e5f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:15:30, skipping insertion in model container [2021-01-06 10:15:30,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:15:30" (3/3) ... [2021-01-06 10:15:30,259 INFO L111 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2021-01-06 10:15:30,270 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:15:30,279 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:15:30,307 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:15:30,345 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:15:30,346 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:15:30,346 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:15:30,347 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:15:30,347 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:15:30,347 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:15:30,347 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:15:30,347 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:15:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-01-06 10:15:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:15:30,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:30,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:30,377 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:30,385 INFO L82 PathProgramCache]: Analyzing trace with hash -23080620, now seen corresponding path program 1 times [2021-01-06 10:15:30,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:30,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083688933] [2021-01-06 10:15:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:15:30,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083688933] [2021-01-06 10:15:30,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:30,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:15:30,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846506641] [2021-01-06 10:15:30,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:15:30,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:30,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:15:30,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:15:30,645 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2021-01-06 10:15:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:30,671 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2021-01-06 10:15:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:15:30,674 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-01-06 10:15:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:30,686 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:15:30,687 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:15:30,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:15:30,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:15:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 10:15:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:15:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-01-06 10:15:30,742 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2021-01-06 10:15:30,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:30,743 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-01-06 10:15:30,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:15:30,743 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-01-06 10:15:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:15:30,744 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:30,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:30,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:15:30,745 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:30,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1060874985, now seen corresponding path program 1 times [2021-01-06 10:15:30,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:30,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893387031] [2021-01-06 10:15:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:15:30,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893387031] [2021-01-06 10:15:30,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:30,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:15:30,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243181760] [2021-01-06 10:15:30,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:30,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:30,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:30,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:15:30,825 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 3 states. [2021-01-06 10:15:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:30,868 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-01-06 10:15:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:30,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:15:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:30,871 INFO L225 Difference]: With dead ends: 50 [2021-01-06 10:15:30,871 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:15:30,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:15:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:15:30,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 10:15:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:15:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-01-06 10:15:30,885 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2021-01-06 10:15:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:30,885 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-01-06 10:15:30,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-01-06 10:15:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:15:30,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:30,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:30,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:15:30,888 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:30,890 INFO L82 PathProgramCache]: Analyzing trace with hash -507200985, now seen corresponding path program 1 times [2021-01-06 10:15:30,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:30,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982343193] [2021-01-06 10:15:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:15:30,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982343193] [2021-01-06 10:15:30,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175454677] [2021-01-06 10:15:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:31,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:15:31,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:15:31,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:31,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:15:31,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986978459] [2021-01-06 10:15:31,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:31,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:31,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:31,116 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 3 states. [2021-01-06 10:15:31,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:31,170 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-01-06 10:15:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:31,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:15:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:31,173 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:15:31,173 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 10:15:31,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 10:15:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-01-06 10:15:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:15:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-01-06 10:15:31,182 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2021-01-06 10:15:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:31,183 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-01-06 10:15:31,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-01-06 10:15:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:15:31,184 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:31,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:31,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:15:31,400 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:31,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1833868074, now seen corresponding path program 1 times [2021-01-06 10:15:31,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:31,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904499187] [2021-01-06 10:15:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:15:31,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904499187] [2021-01-06 10:15:31,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299707841] [2021-01-06 10:15:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:31,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:15:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:31,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:31,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:15:31,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179455459] [2021-01-06 10:15:31,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:31,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:31,618 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2021-01-06 10:15:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:31,637 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-01-06 10:15:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:31,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2021-01-06 10:15:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:31,640 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:15:31,640 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 10:15:31,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 10:15:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-01-06 10:15:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:15:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-01-06 10:15:31,648 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 28 [2021-01-06 10:15:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:31,648 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-01-06 10:15:31,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-01-06 10:15:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:15:31,650 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:31,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:31,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:31,865 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:31,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1777663060, now seen corresponding path program 1 times [2021-01-06 10:15:31,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:31,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821214654] [2021-01-06 10:15:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:31,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821214654] [2021-01-06 10:15:31,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922963045] [2021-01-06 10:15:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:32,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:32,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:32,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:32,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:15:32,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288754030] [2021-01-06 10:15:32,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:32,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:32,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:32,139 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2021-01-06 10:15:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:32,189 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-01-06 10:15:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:32,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2021-01-06 10:15:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:32,193 INFO L225 Difference]: With dead ends: 60 [2021-01-06 10:15:32,195 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 10:15:32,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 10:15:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-01-06 10:15:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:15:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-01-06 10:15:32,205 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2021-01-06 10:15:32,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:32,206 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-01-06 10:15:32,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:32,206 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-01-06 10:15:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:15:32,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:32,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:32,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:32,412 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:32,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:32,414 INFO L82 PathProgramCache]: Analyzing trace with hash -861329106, now seen corresponding path program 2 times [2021-01-06 10:15:32,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:32,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754817405] [2021-01-06 10:15:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:15:32,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754817405] [2021-01-06 10:15:32,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668718958] [2021-01-06 10:15:32,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:32,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:32,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:32,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:32,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:32,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:32,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 10:15:32,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612580993] [2021-01-06 10:15:32,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:32,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:32,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:32,727 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 7 states. [2021-01-06 10:15:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:32,818 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2021-01-06 10:15:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:32,819 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2021-01-06 10:15:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:32,820 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:15:32,821 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:15:32,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:32,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:15:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-01-06 10:15:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:15:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-01-06 10:15:32,830 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2021-01-06 10:15:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:32,830 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-01-06 10:15:32,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-01-06 10:15:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 10:15:32,831 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:32,832 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:33,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:33,045 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:33,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1600422655, now seen corresponding path program 3 times [2021-01-06 10:15:33,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:33,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460490423] [2021-01-06 10:15:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 10:15:33,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460490423] [2021-01-06 10:15:33,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594359809] [2021-01-06 10:15:33,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:33,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:15:33,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:33,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:33,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 10:15:33,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:33,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:15:33,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324383905] [2021-01-06 10:15:33,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:33,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:33,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:33,404 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 5 states. [2021-01-06 10:15:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:33,431 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-01-06 10:15:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:33,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2021-01-06 10:15:33,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:33,433 INFO L225 Difference]: With dead ends: 60 [2021-01-06 10:15:33,433 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 10:15:33,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 10:15:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-01-06 10:15:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:15:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-01-06 10:15:33,442 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 43 [2021-01-06 10:15:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:33,442 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-01-06 10:15:33,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-01-06 10:15:33,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:15:33,444 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:33,445 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:33,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:15:33,694 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:33,695 INFO L82 PathProgramCache]: Analyzing trace with hash 477657599, now seen corresponding path program 4 times [2021-01-06 10:15:33,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:33,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393964846] [2021-01-06 10:15:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-01-06 10:15:33,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393964846] [2021-01-06 10:15:33,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304152331] [2021-01-06 10:15:33,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:33,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:33,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:33,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:33,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 10:15:33,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:33,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-01-06 10:15:33,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892327940] [2021-01-06 10:15:33,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:15:33,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:33,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:15:33,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:33,969 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 9 states. [2021-01-06 10:15:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:34,078 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2021-01-06 10:15:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:15:34,078 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2021-01-06 10:15:34,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:34,079 INFO L225 Difference]: With dead ends: 101 [2021-01-06 10:15:34,080 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 10:15:34,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 10:15:34,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-01-06 10:15:34,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 10:15:34,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2021-01-06 10:15:34,089 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 45 [2021-01-06 10:15:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:34,089 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2021-01-06 10:15:34,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:15:34,089 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2021-01-06 10:15:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:15:34,091 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:34,091 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:34,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:34,297 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:34,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2141553364, now seen corresponding path program 5 times [2021-01-06 10:15:34,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:34,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974494896] [2021-01-06 10:15:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 10:15:34,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974494896] [2021-01-06 10:15:34,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132907148] [2021-01-06 10:15:34,401 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:34,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:15:34,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:34,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-01-06 10:15:34,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:34,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 10:15:34,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876236745] [2021-01-06 10:15:34,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:15:34,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:34,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:15:34,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:34,645 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 11 states. [2021-01-06 10:15:34,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:34,792 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-01-06 10:15:34,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:15:34,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2021-01-06 10:15:34,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:34,794 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:15:34,794 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 10:15:34,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 10:15:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-01-06 10:15:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:15:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-01-06 10:15:34,808 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 56 [2021-01-06 10:15:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:34,808 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-01-06 10:15:34,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:15:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-01-06 10:15:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 10:15:34,813 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:34,813 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:35,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:35,029 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:35,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1510106789, now seen corresponding path program 6 times [2021-01-06 10:15:35,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:35,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920231462] [2021-01-06 10:15:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:15:35,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920231462] [2021-01-06 10:15:35,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26561566] [2021-01-06 10:15:35,147 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:35,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:15:35,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:35,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:15:35,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:35,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 10:15:35,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723075154] [2021-01-06 10:15:35,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:15:35,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:35,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:15:35,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:35,392 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 10 states. [2021-01-06 10:15:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:35,528 INFO L93 Difference]: Finished difference Result 121 states and 154 transitions. [2021-01-06 10:15:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:15:35,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2021-01-06 10:15:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:35,530 INFO L225 Difference]: With dead ends: 121 [2021-01-06 10:15:35,530 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 10:15:35,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 10:15:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-01-06 10:15:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 10:15:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2021-01-06 10:15:35,562 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 67 [2021-01-06 10:15:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:35,562 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2021-01-06 10:15:35,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:15:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2021-01-06 10:15:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 10:15:35,569 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:35,569 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:35,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:15:35,783 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:35,785 INFO L82 PathProgramCache]: Analyzing trace with hash 844556664, now seen corresponding path program 7 times [2021-01-06 10:15:35,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:35,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572357358] [2021-01-06 10:15:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-01-06 10:15:35,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572357358] [2021-01-06 10:15:35,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741148835] [2021-01-06 10:15:35,902 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:36,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:36,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-01-06 10:15:36,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:36,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:15:36,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382326614] [2021-01-06 10:15:36,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:36,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:36,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:36,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:36,145 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 7 states. [2021-01-06 10:15:36,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:36,176 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2021-01-06 10:15:36,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:36,176 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 78 [2021-01-06 10:15:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:36,178 INFO L225 Difference]: With dead ends: 103 [2021-01-06 10:15:36,178 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 10:15:36,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:36,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 10:15:36,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 10:15:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 10:15:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2021-01-06 10:15:36,187 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 78 [2021-01-06 10:15:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:36,187 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2021-01-06 10:15:36,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2021-01-06 10:15:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 10:15:36,189 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:36,189 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:36,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:36,403 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:36,404 INFO L82 PathProgramCache]: Analyzing trace with hash -729603206, now seen corresponding path program 8 times [2021-01-06 10:15:36,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:36,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136751996] [2021-01-06 10:15:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-01-06 10:15:38,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136751996] [2021-01-06 10:15:38,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740708570] [2021-01-06 10:15:38,010 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 10:15:38,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:38,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:38,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 10:15:38,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:38,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:15:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-01-06 10:15:39,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:39,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 28 [2021-01-06 10:15:39,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677195145] [2021-01-06 10:15:39,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:15:39,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:39,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:15:39,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:15:39,006 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 28 states. [2021-01-06 10:15:40,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:40,196 INFO L93 Difference]: Finished difference Result 586 states and 708 transitions. [2021-01-06 10:15:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:15:40,197 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2021-01-06 10:15:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:40,203 INFO L225 Difference]: With dead ends: 586 [2021-01-06 10:15:40,203 INFO L226 Difference]: Without dead ends: 581 [2021-01-06 10:15:40,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:15:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-01-06 10:15:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 216. [2021-01-06 10:15:40,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2021-01-06 10:15:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 288 transitions. [2021-01-06 10:15:40,231 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 288 transitions. Word has length 80 [2021-01-06 10:15:40,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:40,232 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 288 transitions. [2021-01-06 10:15:40,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:15:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 288 transitions. [2021-01-06 10:15:40,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 10:15:40,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:40,234 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:40,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:40,447 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1045404156, now seen corresponding path program 1 times [2021-01-06 10:15:40,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:40,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941205798] [2021-01-06 10:15:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 10:15:41,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941205798] [2021-01-06 10:15:41,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487210680] [2021-01-06 10:15:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:41,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 10:15:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:41,755 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-01-06 10:15:41,756 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-01-06 10:15:41,758 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:41,763 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:15:41,765 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:41,766 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:9 [2021-01-06 10:15:41,818 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 17 treesize of output 9 [2021-01-06 10:15:41,820 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:41,821 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:15:41,822 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:41,822 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:5 [2021-01-06 10:15:41,867 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 10:15:41,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:41,873 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:15:41,877 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:41,877 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:15 [2021-01-06 10:15:42,116 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 21 treesize of output 9 [2021-01-06 10:15:42,117 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:42,120 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:15:42,121 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:42,121 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:5 [2021-01-06 10:15:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-01-06 10:15:42,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:42,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 34 [2021-01-06 10:15:42,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198661271] [2021-01-06 10:15:42,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:15:42,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:15:42,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:15:42,179 INFO L87 Difference]: Start difference. First operand 216 states and 288 transitions. Second operand 34 states. [2021-01-06 10:15:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:44,969 INFO L93 Difference]: Finished difference Result 649 states and 879 transitions. [2021-01-06 10:15:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:15:44,970 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 80 [2021-01-06 10:15:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:44,974 INFO L225 Difference]: With dead ends: 649 [2021-01-06 10:15:44,974 INFO L226 Difference]: Without dead ends: 584 [2021-01-06 10:15:44,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=314, Invalid=2766, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 10:15:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-01-06 10:15:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 377. [2021-01-06 10:15:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2021-01-06 10:15:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 500 transitions. [2021-01-06 10:15:45,013 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 500 transitions. Word has length 80 [2021-01-06 10:15:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:45,013 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 500 transitions. [2021-01-06 10:15:45,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:15:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 500 transitions. [2021-01-06 10:15:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 10:15:45,015 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:45,015 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:45,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:15:45,231 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:45,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:45,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1122630216, now seen corresponding path program 2 times [2021-01-06 10:15:45,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:45,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907898223] [2021-01-06 10:15:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 18 proven. 117 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 10:15:47,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907898223] [2021-01-06 10:15:47,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707654593] [2021-01-06 10:15:47,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:47,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:47,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:47,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 10:15:47,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:47,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:15:47,452 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 22 treesize of output 17 [2021-01-06 10:15:47,454 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:47,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:15:47,466 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:47,467 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2021-01-06 10:15:48,005 INFO L348 Elim1Store]: treesize reduction 54, result has 49.1 percent of original size [2021-01-06 10:15:48,011 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 68 [2021-01-06 10:15:48,020 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:48,041 INFO L625 ElimStorePlain]: treesize reduction 30, result has 53.8 percent of original size [2021-01-06 10:15:48,042 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:48,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2021-01-06 10:15:48,357 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2021-01-06 10:15:48,359 INFO L348 Elim1Store]: treesize reduction 114, result has 51.7 percent of original size [2021-01-06 10:15:48,360 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 141 [2021-01-06 10:15:48,366 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:15:48,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:15:48,372 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:48,408 INFO L625 ElimStorePlain]: treesize reduction 103, result has 25.4 percent of original size [2021-01-06 10:15:48,409 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:48,410 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:35 [2021-01-06 10:15:48,683 INFO L348 Elim1Store]: treesize reduction 160, result has 32.8 percent of original size [2021-01-06 10:15:48,684 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 97 [2021-01-06 10:15:48,690 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:15:48,694 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:48,722 INFO L625 ElimStorePlain]: treesize reduction 77, result has 31.3 percent of original size [2021-01-06 10:15:48,726 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:48,727 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:35 [2021-01-06 10:15:48,940 INFO L348 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-01-06 10:15:48,940 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 36 [2021-01-06 10:15:48,943 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:48,949 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:15:48,950 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:48,950 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:27 [2021-01-06 10:15:49,060 INFO L348 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-01-06 10:15:49,060 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-01-06 10:15:49,062 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:49,069 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:15:49,071 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:49,072 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:15 [2021-01-06 10:15:49,388 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 21 treesize of output 9 [2021-01-06 10:15:49,389 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:49,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:15:49,392 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:49,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:5 [2021-01-06 10:15:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 18 proven. 90 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 10:15:49,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:49,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26] total 55 [2021-01-06 10:15:49,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433680250] [2021-01-06 10:15:49,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 10:15:49,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:49,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 10:15:49,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2796, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 10:15:49,490 INFO L87 Difference]: Start difference. First operand 377 states and 500 transitions. Second operand 55 states. [2021-01-06 10:15:54,818 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 32 [2021-01-06 10:15:55,094 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 34 [2021-01-06 10:15:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:55,661 INFO L93 Difference]: Finished difference Result 1000 states and 1351 transitions. [2021-01-06 10:15:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:15:55,662 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 80 [2021-01-06 10:15:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:55,667 INFO L225 Difference]: With dead ends: 1000 [2021-01-06 10:15:55,667 INFO L226 Difference]: Without dead ends: 808 [2021-01-06 10:15:55,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=502, Invalid=6470, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 10:15:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-01-06 10:15:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 668. [2021-01-06 10:15:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2021-01-06 10:15:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 894 transitions. [2021-01-06 10:15:55,727 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 894 transitions. Word has length 80 [2021-01-06 10:15:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:55,728 INFO L481 AbstractCegarLoop]: Abstraction has 668 states and 894 transitions. [2021-01-06 10:15:55,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 10:15:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 894 transitions. [2021-01-06 10:15:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 10:15:55,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:55,730 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:55,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:15:55,946 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:55,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:55,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1316409220, now seen corresponding path program 3 times [2021-01-06 10:15:55,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:55,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472373386] [2021-01-06 10:15:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 21 proven. 83 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-01-06 10:15:57,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472373386] [2021-01-06 10:15:57,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772743763] [2021-01-06 10:15:57,174 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 10:15:57,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:15:57,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:57,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 10:15:57,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:57,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:15:57,495 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 22 treesize of output 17 [2021-01-06 10:15:57,496 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:57,503 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:15:57,504 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:15:57,504 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:7 [2021-01-06 10:15:58,077 INFO L348 Elim1Store]: treesize reduction 57, result has 52.9 percent of original size [2021-01-06 10:15:58,078 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 80 [2021-01-06 10:15:58,081 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:58,119 INFO L625 ElimStorePlain]: treesize reduction 42, result has 51.2 percent of original size [2021-01-06 10:15:58,122 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:15:58,122 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:44 [2021-01-06 10:15:58,520 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-01-06 10:15:58,521 INFO L348 Elim1Store]: treesize reduction 109, result has 64.4 percent of original size [2021-01-06 10:15:58,521 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 216 [2021-01-06 10:15:58,528 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:15:58,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:15:58,530 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:15:58,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:15:58,531 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:15:58,531 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:15:58,537 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:15:58,538 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:15:58,539 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:15:58,541 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:15:58,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:15:58,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:15:58,550 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:15:58,695 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 40 [2021-01-06 10:15:58,696 INFO L625 ElimStorePlain]: treesize reduction 459, result has 14.7 percent of original size [2021-01-06 10:15:58,700 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:15:58,702 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:15:58,703 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:15:58,706 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 10:15:58,707 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:73, output treesize:79 [2021-01-06 10:15:58,711 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:15:58,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:15:58,713 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:12,859 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 45 [2021-01-06 10:16:12,866 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:12,868 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:12,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:25,045 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,048 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,050 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:25,052 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 10:16:25,063 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,065 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,066 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:25,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:25,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:25,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:25,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:25,214 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:16:25,214 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 6 case distinctions, treesize of input 59 treesize of output 234 [2021-01-06 10:16:25,220 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:16:25,221 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:25,221 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:16:25,222 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,222 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:16:25,223 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:25,224 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:25,228 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:16:25,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:25,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:25,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:25,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:25,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:25,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:25,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:25,475 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-01-06 10:16:25,475 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:16:25,476 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 79 treesize of output 438 [2021-01-06 10:16:25,484 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:25,487 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 2, 1] term [2021-01-06 10:16:25,487 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:16:25,488 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2021-01-06 10:16:25,488 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:16:25,489 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2021-01-06 10:16:25,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:16:25,490 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:16:25,490 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:25,491 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:16:25,491 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,492 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:16:25,492 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:25,494 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 5, 2, 3, 2, 4, 2, 2, 2, 2, 3, 1] term [2021-01-06 10:16:25,495 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:16:25,496 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 3, 2, 4, 2, 2, 2, 2, 3, 1] term [2021-01-06 10:16:25,496 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:16:25,497 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 4, 2, 2, 2, 2, 3, 1] term [2021-01-06 10:16:25,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:16:25,498 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2021-01-06 10:16:25,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:16:25,499 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2021-01-06 10:16:25,499 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:16:25,500 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:16:25,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:25,501 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:16:25,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,501 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:16:25,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:25,504 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 2, 2, 2, 3, 1] term [2021-01-06 10:16:25,504 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:16:25,505 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 2, 3, 1] term [2021-01-06 10:16:25,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:16:25,507 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 2, 3, 1] term [2021-01-06 10:16:25,507 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:25,508 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 3, 1] term [2021-01-06 10:16:25,509 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,509 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 1] term [2021-01-06 10:16:25,509 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:25,511 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:16:25,511 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:25,512 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2021-01-06 10:16:25,513 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:16:25,513 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2021-01-06 10:16:25,514 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:16:25,514 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:16:25,515 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:25,521 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:16:25,522 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,522 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:16:25,523 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:25,526 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 2, 1] term [2021-01-06 10:16:25,527 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:16:25,528 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 2, 1] term [2021-01-06 10:16:25,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:16:25,530 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2021-01-06 10:16:25,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:16:25,530 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2021-01-06 10:16:25,531 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:16:25,531 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:16:25,531 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:25,532 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:16:25,532 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,533 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:16:25,533 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:25,558 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:16:25,861 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 40 [2021-01-06 10:16:25,862 INFO L625 ElimStorePlain]: treesize reduction 2042, result has 4.0 percent of original size [2021-01-06 10:16:25,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,868 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:25,871 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 10:16:25,871 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:162, output treesize:84 [2021-01-06 10:16:25,873 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:25,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:28,002 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 47 [2021-01-06 10:16:28,014 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:28,016 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:46,197 WARN L197 SmtUtils]: Spent 18.09 s on a formula simplification that was a NOOP. DAG size: 45 [2021-01-06 10:16:46,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:46,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:46,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:46,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:46,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:46,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:46,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:46,438 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-01-06 10:16:46,439 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:16:46,440 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 79 treesize of output 334 [2021-01-06 10:16:46,462 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 2, 1] term [2021-01-06 10:16:46,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:16:46,463 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2021-01-06 10:16:46,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:16:46,464 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2021-01-06 10:16:46,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:16:46,466 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 10:16:46,466 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:46,467 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 10:16:46,467 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:46,468 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:16:46,468 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:46,470 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:46,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:46,478 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:16:46,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:46,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:46,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:16:46,543 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:16:46,543 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 3 case distinctions, treesize of input 59 treesize of output 130 [2021-01-06 10:16:46,547 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:46,548 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:46,552 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:16:47,131 WARN L197 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 70 [2021-01-06 10:16:47,133 INFO L625 ElimStorePlain]: treesize reduction 568, result has 28.4 percent of original size [2021-01-06 10:16:47,135 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:47,136 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:47,138 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:47,140 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:47,142 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 2 xjuncts. [2021-01-06 10:16:47,142 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:163, output treesize:225 [2021-01-06 10:16:47,144 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:16:47,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:47,146 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:47,148 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:59,378 WARN L197 SmtUtils]: Spent 10.07 s on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2021-01-06 10:16:59,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:59,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:16:59,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:16:59,397 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:16:59,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:17:00,091 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-01-06 10:17:00,091 INFO L348 Elim1Store]: treesize reduction 52, result has 72.6 percent of original size [2021-01-06 10:17:00,092 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 155 [2021-01-06 10:17:00,095 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:17:00,096 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:17:00,098 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:17:00,146 INFO L625 ElimStorePlain]: treesize reduction 90, result has 26.8 percent of original size [2021-01-06 10:17:00,148 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:17:00,149 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:21 [2021-01-06 10:17:00,407 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:17:00,407 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 26 treesize of output 26 [2021-01-06 10:17:00,410 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 10:17:00,425 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:17:00,427 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:17:00,429 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-01-06 10:17:00,429 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:12 [2021-01-06 10:17:00,526 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2021-01-06 10:17:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 68 refuted. 1 times theorem prover too weak. 68 trivial. 0 not checked. [2021-01-06 10:17:00,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:17:00,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-01-06 10:17:00,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269543469] [2021-01-06 10:17:00,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 10:17:00,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:17:00,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 10:17:01,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2270, Unknown=7, NotChecked=0, Total=2450 [2021-01-06 10:17:01,001 INFO L87 Difference]: Start difference. First operand 668 states and 894 transitions. Second operand 50 states. [2021-01-06 10:17:03,030 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-01-06 10:17:03,389 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-01-06 10:17:03,670 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-01-06 10:17:07,949 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-01-06 10:17:08,210 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-01-06 10:17:08,440 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-01-06 10:17:08,891 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-01-06 10:17:09,166 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-01-06 10:17:09,661 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-01-06 10:17:15,962 WARN L197 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 10:18:03,862 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-01-06 10:18:10,195 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-01-06 10:18:25,345 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-01-06 10:18:53,769 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-01-06 10:19:00,418 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-01-06 10:19:04,801 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-01-06 10:19:09,304 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-01-06 10:19:11,754 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-01-06 10:19:16,344 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-01-06 10:19:20,932 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-01-06 10:19:27,450 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-01-06 10:19:29,821 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-01-06 10:19:36,491 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-01-06 10:19:40,875 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-01-06 10:19:45,616 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-01-06 10:19:52,179 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 43