/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/rangesum20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:25:33,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:25:33,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:25:33,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:25:33,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:25:33,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:25:33,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:25:33,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:25:33,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:25:33,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:25:33,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:25:33,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:25:33,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:25:33,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:25:33,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:25:33,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:25:33,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:25:33,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:25:33,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:25:33,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:25:33,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:25:33,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:25:33,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:25:33,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:25:33,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:25:33,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:25:33,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:25:33,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:25:33,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:25:33,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:25:33,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:25:33,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:25:33,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:25:33,370 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:25:33,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:25:33,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:25:33,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:25:33,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:25:33,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:25:33,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:25:33,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:25:33,373 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:25:33,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:25:33,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:25:33,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:25:33,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:25:33,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:25:33,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:25:33,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:25:33,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:25:33,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:25:33,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:25:33,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:25:33,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:25:33,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:25:33,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:25:33,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:25:33,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:25:33,956 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:25:33,958 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:25:33,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum20.i [2020-12-23 00:25:34,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0009e3c58/c5ec66ca02754cacbc4df5ff3284c39c/FLAGbd40d3a3b [2020-12-23 00:25:34,675 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:25:34,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum20.i [2020-12-23 00:25:34,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0009e3c58/c5ec66ca02754cacbc4df5ff3284c39c/FLAGbd40d3a3b [2020-12-23 00:25:35,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0009e3c58/c5ec66ca02754cacbc4df5ff3284c39c [2020-12-23 00:25:35,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:25:35,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:25:35,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:25:35,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:25:35,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:25:35,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@380640bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35, skipping insertion in model container [2020-12-23 00:25:35,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:25:35,075 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~cnt~0,] 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[19]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:25:35,327 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/rangesum20.i[1465,1478] [2020-12-23 00:25:35,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:25:35,341 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~cnt~0,] 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[76],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:25:35,400 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/rangesum20.i[1465,1478] [2020-12-23 00:25:35,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:25:35,427 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:25:35,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35 WrapperNode [2020-12-23 00:25:35,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:25:35,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:25:35,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:25:35,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:25:35,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:25:35,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:25:35,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:25:35,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:25:35,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:25:35,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:25:35,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:25:35,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:25:35,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:25:35,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:25:35,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:25:35,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:25:35,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:25:35,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:25:35,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:25:35,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:25:36,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:25:36,366 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 00:25:36,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:25:36 BoogieIcfgContainer [2020-12-23 00:25:36,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:25:36,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:25:36,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:25:36,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:25:36,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:25:35" (1/3) ... [2020-12-23 00:25:36,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cdd144a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:25:36, skipping insertion in model container [2020-12-23 00:25:36,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (2/3) ... [2020-12-23 00:25:36,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cdd144a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:25:36, skipping insertion in model container [2020-12-23 00:25:36,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:25:36" (3/3) ... [2020-12-23 00:25:36,385 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2020-12-23 00:25:36,398 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:25:36,404 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:25:36,429 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:25:36,479 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:25:36,479 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:25:36,480 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:25:36,480 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:25:36,480 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:25:36,480 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:25:36,480 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:25:36,481 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:25:36,500 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-23 00:25:36,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:25:36,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:36,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:36,508 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:36,515 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2020-12-23 00:25:36,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:36,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050115618] [2020-12-23 00:25:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:25:36,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050115618] [2020-12-23 00:25:36,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:36,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:25:36,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316507234] [2020-12-23 00:25:36,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:25:36,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:25:36,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:25:36,737 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-23 00:25:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:36,761 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2020-12-23 00:25:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:25:36,763 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-23 00:25:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:36,775 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:25:36,776 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:25:36,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:25:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:25:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 00:25:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:25:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-23 00:25:36,821 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2020-12-23 00:25:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:36,822 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-23 00:25:36,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:25:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-23 00:25:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:25:36,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:36,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:36,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:25:36,824 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:36,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:36,825 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2020-12-23 00:25:36,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:36,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442046311] [2020-12-23 00:25:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:36,860 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:36,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436055280] [2020-12-23 00:25:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:37,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:37,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:25:37,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442046311] [2020-12-23 00:25:37,114 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:37,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436055280] [2020-12-23 00:25:37,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:37,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:25:37,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651997039] [2020-12-23 00:25:37,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:37,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:37,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:37,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:25:37,150 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2020-12-23 00:25:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:37,184 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-12-23 00:25:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:37,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:25:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:37,187 INFO L225 Difference]: With dead ends: 50 [2020-12-23 00:25:37,187 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 00:25:37,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:25:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 00:25:37,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 00:25:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:25:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-12-23 00:25:37,196 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2020-12-23 00:25:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:37,196 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-12-23 00:25:37,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-12-23 00:25:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:25:37,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:37,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:37,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:25:37,414 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:37,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2020-12-23 00:25:37,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:37,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933123918] [2020-12-23 00:25:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:25:37,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933123918] [2020-12-23 00:25:37,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601958651] [2020-12-23 00:25:37,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:37,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:37,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:25:37,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:37,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:37,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725481397] [2020-12-23 00:25:37,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:37,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:37,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:37,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:37,847 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-12-23 00:25:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:37,942 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2020-12-23 00:25:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:37,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:25:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:37,945 INFO L225 Difference]: With dead ends: 57 [2020-12-23 00:25:37,945 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 00:25:37,946 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 [2020-12-23 00:25:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 00:25:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-23 00:25:37,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:25:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-12-23 00:25:37,953 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2020-12-23 00:25:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:37,953 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-12-23 00:25:37,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-12-23 00:25:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:25:37,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:37,955 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] [2020-12-23 00:25:38,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:38,171 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:38,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2020-12-23 00:25:38,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:38,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124795644] [2020-12-23 00:25:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:25:38,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124795644] [2020-12-23 00:25:38,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028687381] [2020-12-23 00:25:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:38,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:38,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:38,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413405241] [2020-12-23 00:25:38,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:38,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:38,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:38,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:38,429 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2020-12-23 00:25:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:38,449 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-12-23 00:25:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:38,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-23 00:25:38,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:38,452 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:25:38,452 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:25:38,453 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 [2020-12-23 00:25:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:25:38,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-23 00:25:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:25:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-12-23 00:25:38,459 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2020-12-23 00:25:38,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:38,460 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-12-23 00:25:38,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-12-23 00:25:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:25:38,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:38,461 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] [2020-12-23 00:25:38,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:38,676 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2020-12-23 00:25:38,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:38,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148910098] [2020-12-23 00:25:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:38,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148910098] [2020-12-23 00:25:38,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907708520] [2020-12-23 00:25:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:38,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:38,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:25:38,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:38,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:38,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370169126] [2020-12-23 00:25:38,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:38,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:38,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:38,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:38,940 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-12-23 00:25:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:39,032 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2020-12-23 00:25:39,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:39,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-23 00:25:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:39,037 INFO L225 Difference]: With dead ends: 78 [2020-12-23 00:25:39,037 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 00:25:39,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 00:25:39,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-12-23 00:25:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:25:39,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-12-23 00:25:39,062 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2020-12-23 00:25:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:39,063 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-12-23 00:25:39,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-12-23 00:25:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:25:39,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:39,066 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] [2020-12-23 00:25:39,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:39,282 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:39,284 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2020-12-23 00:25:39,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:39,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989434982] [2020-12-23 00:25:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:39,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989434982] [2020-12-23 00:25:39,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510252957] [2020-12-23 00:25:39,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:39,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:39,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:39,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:39,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:25:39,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362471631] [2020-12-23 00:25:39,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:39,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:39,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:39,573 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2020-12-23 00:25:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:39,614 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2020-12-23 00:25:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:39,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-23 00:25:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:39,621 INFO L225 Difference]: With dead ends: 90 [2020-12-23 00:25:39,621 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:25:39,623 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 [2020-12-23 00:25:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:25:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:25:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:25:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-12-23 00:25:39,642 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2020-12-23 00:25:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:39,642 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-12-23 00:25:39,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-12-23 00:25:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:25:39,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:39,647 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] [2020-12-23 00:25:39,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:25:39,848 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:39,850 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2020-12-23 00:25:39,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:39,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124988918] [2020-12-23 00:25:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:25:39,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124988918] [2020-12-23 00:25:39,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612720595] [2020-12-23 00:25:39,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:40,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:25:40,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:40,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:25:40,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:25:40,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:40,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-12-23 00:25:40,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630036654] [2020-12-23 00:25:40,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:25:40,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:25:40,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:25:40,148 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-12-23 00:25:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:40,230 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2020-12-23 00:25:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:25:40,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-23 00:25:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:40,232 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:25:40,233 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 00:25:40,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:25:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 00:25:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-12-23 00:25:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 00:25:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-12-23 00:25:40,245 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2020-12-23 00:25:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:40,246 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-12-23 00:25:40,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:25:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-12-23 00:25:40,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:25:40,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:40,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:40,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:40,462 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2020-12-23 00:25:40,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:40,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106930733] [2020-12-23 00:25:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 00:25:40,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106930733] [2020-12-23 00:25:40,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209600428] [2020-12-23 00:25:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:40,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:40,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:25:40,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:40,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:25:40,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249023018] [2020-12-23 00:25:40,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:40,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:40,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:40,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:40,671 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2020-12-23 00:25:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:40,783 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2020-12-23 00:25:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:40,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-23 00:25:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:40,786 INFO L225 Difference]: With dead ends: 162 [2020-12-23 00:25:40,787 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 00:25:40,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:40,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 00:25:40,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-23 00:25:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:25:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-12-23 00:25:40,800 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2020-12-23 00:25:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:40,800 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-12-23 00:25:40,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-12-23 00:25:40,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:25:40,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:40,802 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2020-12-23 00:25:41,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:41,017 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:41,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2020-12-23 00:25:41,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:41,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678319903] [2020-12-23 00:25:41,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:41,036 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:41,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643888263] [2020-12-23 00:25:41,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:41,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:41,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-23 00:25:41,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678319903] [2020-12-23 00:25:41,194 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:41,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643888263] [2020-12-23 00:25:41,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:41,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:41,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980960871] [2020-12-23 00:25:41,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:41,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:41,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:41,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:41,197 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2020-12-23 00:25:41,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:41,225 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2020-12-23 00:25:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:41,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-23 00:25:41,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:41,227 INFO L225 Difference]: With dead ends: 174 [2020-12-23 00:25:41,227 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:25:41,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:25:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:25:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:25:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2020-12-23 00:25:41,253 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2020-12-23 00:25:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:41,254 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2020-12-23 00:25:41,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2020-12-23 00:25:41,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:25:41,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:41,260 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1] [2020-12-23 00:25:41,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:25:41,474 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:41,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:41,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2020-12-23 00:25:41,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:41,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436517169] [2020-12-23 00:25:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:25:41,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436517169] [2020-12-23 00:25:41,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:41,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:25:41,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694062100] [2020-12-23 00:25:41,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:41,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:41,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:41,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:41,540 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2020-12-23 00:25:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:41,619 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2020-12-23 00:25:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:41,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-23 00:25:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:41,621 INFO L225 Difference]: With dead ends: 177 [2020-12-23 00:25:41,621 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 00:25:41,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 00:25:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2020-12-23 00:25:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:25:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-12-23 00:25:41,629 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2020-12-23 00:25:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:41,630 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-12-23 00:25:41,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-12-23 00:25:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 00:25:41,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:41,631 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:41,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 00:25:41,632 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:41,633 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2020-12-23 00:25:41,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:41,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390880965] [2020-12-23 00:25:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:41,649 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:41,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519125036] [2020-12-23 00:25:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:41,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:25:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 00:25:41,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390880965] [2020-12-23 00:25:41,867 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:41,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519125036] [2020-12-23 00:25:41,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:41,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:25:41,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748445320] [2020-12-23 00:25:41,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:41,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:41,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:41,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:41,869 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2020-12-23 00:25:41,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:41,899 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2020-12-23 00:25:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:41,900 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-23 00:25:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:41,901 INFO L225 Difference]: With dead ends: 158 [2020-12-23 00:25:41,901 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:25:41,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:25:41,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 00:25:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:25:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-12-23 00:25:41,909 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2020-12-23 00:25:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:41,909 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-12-23 00:25:41,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-12-23 00:25:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:25:41,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:41,910 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:42,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:42,124 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2020-12-23 00:25:42,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:42,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569567020] [2020-12-23 00:25:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:42,140 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:42,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465611929] [2020-12-23 00:25:42,141 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 [2020-12-23 00:25:42,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:42,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:42,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:25:42,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 00:25:42,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569567020] [2020-12-23 00:25:42,352 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:42,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465611929] [2020-12-23 00:25:42,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:42,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:25:42,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921032063] [2020-12-23 00:25:42,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:25:42,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:42,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:25:42,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:25:42,354 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 8 states. [2020-12-23 00:25:42,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:42,389 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-12-23 00:25:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:25:42,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-23 00:25:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:42,391 INFO L225 Difference]: With dead ends: 160 [2020-12-23 00:25:42,391 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 00:25:42,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:25:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 00:25:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-23 00:25:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 00:25:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-12-23 00:25:42,399 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2020-12-23 00:25:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:42,399 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-12-23 00:25:42,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:25:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-12-23 00:25:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:25:42,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:42,400 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:42,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:42,617 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2020-12-23 00:25:42,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:42,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832711774] [2020-12-23 00:25:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:42,634 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:42,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759247907] [2020-12-23 00:25:42,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:42,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:25:42,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:42,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:42,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-23 00:25:42,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832711774] [2020-12-23 00:25:42,798 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:42,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759247907] [2020-12-23 00:25:42,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:42,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:25:42,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538578857] [2020-12-23 00:25:42,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:42,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:42,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:42,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:42,801 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 4 states. [2020-12-23 00:25:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:42,839 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-12-23 00:25:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:42,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-12-23 00:25:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:42,841 INFO L225 Difference]: With dead ends: 116 [2020-12-23 00:25:42,841 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 00:25:42,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 00:25:42,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-12-23 00:25:42,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:25:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-12-23 00:25:42,847 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2020-12-23 00:25:42,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:42,847 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-12-23 00:25:42,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:42,847 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-12-23 00:25:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:25:42,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:42,848 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:43,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:25:43,063 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:43,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:43,064 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2020-12-23 00:25:43,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:43,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630750125] [2020-12-23 00:25:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:43,079 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:43,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035485250] [2020-12-23 00:25:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:43,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:25:43,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 00:25:43,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630750125] [2020-12-23 00:25:43,294 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:43,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035485250] [2020-12-23 00:25:43,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:43,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:25:43,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924153395] [2020-12-23 00:25:43,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:25:43,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:43,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:25:43,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:25:43,298 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 9 states. [2020-12-23 00:25:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:43,331 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-12-23 00:25:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:25:43,331 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-23 00:25:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:43,332 INFO L225 Difference]: With dead ends: 106 [2020-12-23 00:25:43,332 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:25:43,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:25:43,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:25:43,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-23 00:25:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 00:25:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-12-23 00:25:43,337 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2020-12-23 00:25:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:43,338 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-12-23 00:25:43,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:25:43,338 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-12-23 00:25:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 00:25:43,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:43,339 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:43,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:25:43,553 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:43,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2020-12-23 00:25:43,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:43,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814021126] [2020-12-23 00:25:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:43,570 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:43,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277156485] [2020-12-23 00:25:43,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:43,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:43,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:43,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:25:43,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 00:25:43,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814021126] [2020-12-23 00:25:43,802 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:43,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277156485] [2020-12-23 00:25:43,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:43,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:25:43,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773104749] [2020-12-23 00:25:43,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:25:43,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:43,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:25:43,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:25:43,804 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-12-23 00:25:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:43,845 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-12-23 00:25:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:25:43,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-12-23 00:25:43,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:43,846 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:25:43,846 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 00:25:43,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:25:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 00:25:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-23 00:25:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:25:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-12-23 00:25:43,851 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2020-12-23 00:25:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:43,852 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-12-23 00:25:43,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:25:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-12-23 00:25:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 00:25:43,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:43,853 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:44,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:25:44,061 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2020-12-23 00:25:44,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:44,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893414061] [2020-12-23 00:25:44,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:44,077 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:44,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962243945] [2020-12-23 00:25:44,078 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:44,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:25:44,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:44,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:44,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:25:44,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893414061] [2020-12-23 00:25:44,222 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:44,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962243945] [2020-12-23 00:25:44,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:44,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 00:25:44,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390568086] [2020-12-23 00:25:44,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:44,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:44,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:44,224 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 4 states. [2020-12-23 00:25:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:44,243 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-12-23 00:25:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:44,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-12-23 00:25:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:44,244 INFO L225 Difference]: With dead ends: 82 [2020-12-23 00:25:44,245 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 00:25:44,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 00:25:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-23 00:25:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:25:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-23 00:25:44,249 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2020-12-23 00:25:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:44,250 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-23 00:25:44,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-23 00:25:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 00:25:44,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:44,251 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:44,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:44,466 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:44,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:44,467 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2020-12-23 00:25:44,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:44,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356986881] [2020-12-23 00:25:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:44,484 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:44,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036344879] [2020-12-23 00:25:44,484 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:44,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:44,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:44,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:25:44,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356986881] [2020-12-23 00:25:44,629 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:44,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036344879] [2020-12-23 00:25:44,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:44,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:25:44,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557732354] [2020-12-23 00:25:44,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:44,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:44,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:44,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:44,634 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2020-12-23 00:25:44,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:44,716 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-12-23 00:25:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:25:44,717 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-23 00:25:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:44,718 INFO L225 Difference]: With dead ends: 117 [2020-12-23 00:25:44,718 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 00:25:44,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 00:25:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-23 00:25:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 00:25:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-12-23 00:25:44,724 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2020-12-23 00:25:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:44,724 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-12-23 00:25:44,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-12-23 00:25:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:25:44,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:44,726 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:44,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:25:44,940 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:44,941 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2020-12-23 00:25:44,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:44,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555175208] [2020-12-23 00:25:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:44,956 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:44,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761705267] [2020-12-23 00:25:44,957 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:45,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 00:25:45,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:45,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:45,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-23 00:25:45,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555175208] [2020-12-23 00:25:45,191 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:45,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761705267] [2020-12-23 00:25:45,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:45,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:45,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79566713] [2020-12-23 00:25:45,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:45,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:45,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:45,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:45,193 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 6 states. [2020-12-23 00:25:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:45,288 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2020-12-23 00:25:45,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:45,288 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-12-23 00:25:45,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:45,289 INFO L225 Difference]: With dead ends: 132 [2020-12-23 00:25:45,289 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:25:45,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:45,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:25:45,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-12-23 00:25:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:25:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-12-23 00:25:45,296 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2020-12-23 00:25:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:45,297 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-12-23 00:25:45,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-12-23 00:25:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:25:45,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:45,298 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:45,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:25:45,512 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2020-12-23 00:25:45,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:45,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459614419] [2020-12-23 00:25:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:45,528 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:45,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402012017] [2020-12-23 00:25:45,529 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:45,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:25:45,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:45,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 00:25:46,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459614419] [2020-12-23 00:25:46,007 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:46,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402012017] [2020-12-23 00:25:46,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:46,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:25:46,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454437321] [2020-12-23 00:25:46,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:46,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:46,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:46,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:46,011 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2020-12-23 00:25:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:46,072 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-12-23 00:25:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:25:46,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-12-23 00:25:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:46,076 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:25:46,077 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:25:46,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:25:46,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 00:25:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:25:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-12-23 00:25:46,084 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2020-12-23 00:25:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:46,085 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-12-23 00:25:46,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-12-23 00:25:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 00:25:46,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:46,086 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:46,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:46,301 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2020-12-23 00:25:46,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:46,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734248237] [2020-12-23 00:25:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:46,319 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:46,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362221042] [2020-12-23 00:25:46,320 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:25:46,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 00:25:46,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734248237] [2020-12-23 00:25:46,578 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:46,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362221042] [2020-12-23 00:25:46,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:46,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:25:46,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022622882] [2020-12-23 00:25:46,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:25:46,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:46,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:25:46,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:25:46,581 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 11 states. [2020-12-23 00:25:46,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:46,626 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-12-23 00:25:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:25:46,626 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-12-23 00:25:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:46,627 INFO L225 Difference]: With dead ends: 154 [2020-12-23 00:25:46,627 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 00:25:46,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:25:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 00:25:46,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-23 00:25:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 00:25:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-12-23 00:25:46,634 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2020-12-23 00:25:46,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:46,634 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-12-23 00:25:46,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:25:46,634 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-12-23 00:25:46,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 00:25:46,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:46,635 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:46,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:46,849 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:46,850 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2020-12-23 00:25:46,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:46,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028738110] [2020-12-23 00:25:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:46,865 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:46,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84046287] [2020-12-23 00:25:46,866 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:47,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:47,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:25:47,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 00:25:47,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028738110] [2020-12-23 00:25:47,223 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:47,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84046287] [2020-12-23 00:25:47,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:47,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:25:47,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411805616] [2020-12-23 00:25:47,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:25:47,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:47,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:25:47,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:25:47,226 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 12 states. [2020-12-23 00:25:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:47,270 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-12-23 00:25:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:25:47,271 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-12-23 00:25:47,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:47,272 INFO L225 Difference]: With dead ends: 156 [2020-12-23 00:25:47,272 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 00:25:47,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:25:47,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 00:25:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-23 00:25:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 00:25:47,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2020-12-23 00:25:47,278 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2020-12-23 00:25:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:47,278 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2020-12-23 00:25:47,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:25:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2020-12-23 00:25:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 00:25:47,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:47,279 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:47,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:47,494 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:47,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2020-12-23 00:25:47,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:47,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659680000] [2020-12-23 00:25:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:47,510 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:47,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337752602] [2020-12-23 00:25:47,511 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:47,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:25:47,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:47,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:47,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-12-23 00:25:47,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659680000] [2020-12-23 00:25:47,952 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:47,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337752602] [2020-12-23 00:25:47,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:47,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:25:47,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833922604] [2020-12-23 00:25:47,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:47,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:47,954 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 5 states. [2020-12-23 00:25:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:48,040 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-12-23 00:25:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:25:48,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-12-23 00:25:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:48,042 INFO L225 Difference]: With dead ends: 153 [2020-12-23 00:25:48,042 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:25:48,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:25:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-12-23 00:25:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 00:25:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-12-23 00:25:48,048 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2020-12-23 00:25:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:48,049 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-12-23 00:25:48,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-12-23 00:25:48,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 00:25:48,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:48,050 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:48,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:25:48,266 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:48,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:48,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2020-12-23 00:25:48,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:48,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687152075] [2020-12-23 00:25:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:48,283 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:48,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197846006] [2020-12-23 00:25:48,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:48,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:48,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:48,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:25:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-12-23 00:25:48,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687152075] [2020-12-23 00:25:48,458 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:48,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197846006] [2020-12-23 00:25:48,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:48,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:25:48,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328968799] [2020-12-23 00:25:48,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:48,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:48,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:48,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:48,461 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 7 states. [2020-12-23 00:25:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:48,558 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2020-12-23 00:25:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:48,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-12-23 00:25:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:48,560 INFO L225 Difference]: With dead ends: 173 [2020-12-23 00:25:48,560 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:25:48,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:25:48,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-12-23 00:25:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 00:25:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2020-12-23 00:25:48,567 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 97 [2020-12-23 00:25:48,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:48,568 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2020-12-23 00:25:48,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2020-12-23 00:25:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:25:48,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:48,569 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:48,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:25:48,783 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:48,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:48,784 INFO L82 PathProgramCache]: Analyzing trace with hash -983224722, now seen corresponding path program 11 times [2020-12-23 00:25:48,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:48,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857102862] [2020-12-23 00:25:48,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:48,798 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:48,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015106681] [2020-12-23 00:25:48,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:49,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:25:49,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:49,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:25:49,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-12-23 00:25:49,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857102862] [2020-12-23 00:25:49,199 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:49,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015106681] [2020-12-23 00:25:49,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:49,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:25:49,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717859089] [2020-12-23 00:25:49,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:25:49,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:49,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:25:49,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:25:49,204 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 8 states. [2020-12-23 00:25:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:49,314 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2020-12-23 00:25:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:25:49,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-12-23 00:25:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:49,316 INFO L225 Difference]: With dead ends: 188 [2020-12-23 00:25:49,316 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 00:25:49,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:25:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 00:25:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2020-12-23 00:25:49,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 00:25:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2020-12-23 00:25:49,323 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 106 [2020-12-23 00:25:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:49,324 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2020-12-23 00:25:49,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:25:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2020-12-23 00:25:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 00:25:49,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:49,325 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:49,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:49,540 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:49,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash -700509419, now seen corresponding path program 12 times [2020-12-23 00:25:49,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:49,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191916422] [2020-12-23 00:25:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:49,557 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:49,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820819098] [2020-12-23 00:25:49,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:49,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:25:49,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:49,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:49,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:25:50,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191916422] [2020-12-23 00:25:50,037 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:50,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820819098] [2020-12-23 00:25:50,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:50,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:50,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116165363] [2020-12-23 00:25:50,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:50,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:50,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:50,039 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 6 states. [2020-12-23 00:25:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:50,066 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2020-12-23 00:25:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:50,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-12-23 00:25:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:50,068 INFO L225 Difference]: With dead ends: 150 [2020-12-23 00:25:50,068 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 00:25:50,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 00:25:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-12-23 00:25:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 00:25:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2020-12-23 00:25:50,075 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 115 [2020-12-23 00:25:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:50,076 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2020-12-23 00:25:50,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2020-12-23 00:25:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 00:25:50,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:50,077 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:50,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:25:50,291 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash -111816429, now seen corresponding path program 13 times [2020-12-23 00:25:50,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:50,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714246469] [2020-12-23 00:25:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:50,307 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:50,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454082653] [2020-12-23 00:25:50,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:50,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:25:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-12-23 00:25:50,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714246469] [2020-12-23 00:25:50,633 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:50,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454082653] [2020-12-23 00:25:50,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:50,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:25:50,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463447946] [2020-12-23 00:25:50,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:25:50,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:50,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:25:50,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:25:50,636 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 13 states. [2020-12-23 00:25:50,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:50,684 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2020-12-23 00:25:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:25:50,685 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 117 [2020-12-23 00:25:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:50,686 INFO L225 Difference]: With dead ends: 216 [2020-12-23 00:25:50,686 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 00:25:50,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:25:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 00:25:50,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-12-23 00:25:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:25:50,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2020-12-23 00:25:50,694 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 117 [2020-12-23 00:25:50,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:50,694 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2020-12-23 00:25:50,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:25:50,694 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2020-12-23 00:25:50,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:25:50,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:50,696 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:50,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:50,910 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:50,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:50,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1032300881, now seen corresponding path program 14 times [2020-12-23 00:25:50,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:50,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484617590] [2020-12-23 00:25:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:50,926 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:50,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877758838] [2020-12-23 00:25:50,927 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:51,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:51,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:51,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:25:51,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-12-23 00:25:51,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484617590] [2020-12-23 00:25:51,245 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:51,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877758838] [2020-12-23 00:25:51,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:51,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 00:25:51,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856672972] [2020-12-23 00:25:51,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:25:51,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:51,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:25:51,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:25:51,247 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand 14 states. [2020-12-23 00:25:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:51,320 INFO L93 Difference]: Finished difference Result 218 states and 238 transitions. [2020-12-23 00:25:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:25:51,321 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 119 [2020-12-23 00:25:51,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:51,322 INFO L225 Difference]: With dead ends: 218 [2020-12-23 00:25:51,322 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 00:25:51,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:25:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 00:25:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-12-23 00:25:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 00:25:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-12-23 00:25:51,330 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 119 [2020-12-23 00:25:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:51,330 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-12-23 00:25:51,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:25:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-12-23 00:25:51,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 00:25:51,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:51,332 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:51,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:25:51,546 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:51,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1017408015, now seen corresponding path program 15 times [2020-12-23 00:25:51,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:51,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272599203] [2020-12-23 00:25:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:51,565 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:51,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939204556] [2020-12-23 00:25:51,565 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:52,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:25:52,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:52,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:52,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-12-23 00:25:52,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272599203] [2020-12-23 00:25:52,253 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:52,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939204556] [2020-12-23 00:25:52,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:52,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:52,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201805201] [2020-12-23 00:25:52,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:52,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:52,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:52,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:52,254 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 6 states. [2020-12-23 00:25:52,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:52,374 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2020-12-23 00:25:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:52,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2020-12-23 00:25:52,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:52,376 INFO L225 Difference]: With dead ends: 206 [2020-12-23 00:25:52,376 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 00:25:52,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 00:25:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2020-12-23 00:25:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 00:25:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2020-12-23 00:25:52,385 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 121 [2020-12-23 00:25:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:52,385 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2020-12-23 00:25:52,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2020-12-23 00:25:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 00:25:52,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:52,387 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:52,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:25:52,602 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:52,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:52,603 INFO L82 PathProgramCache]: Analyzing trace with hash 171712334, now seen corresponding path program 16 times [2020-12-23 00:25:52,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:52,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051984652] [2020-12-23 00:25:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:52,621 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:52,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230366365] [2020-12-23 00:25:52,622 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:52,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:52,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:52,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:25:52,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 53 proven. 57 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-12-23 00:25:52,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051984652] [2020-12-23 00:25:52,864 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:52,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230366365] [2020-12-23 00:25:52,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:52,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:25:52,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791279347] [2020-12-23 00:25:52,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:25:52,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:52,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:25:52,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:25:52,866 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand 9 states. [2020-12-23 00:25:53,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:53,029 INFO L93 Difference]: Finished difference Result 229 states and 257 transitions. [2020-12-23 00:25:53,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:25:53,029 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-23 00:25:53,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:53,030 INFO L225 Difference]: With dead ends: 229 [2020-12-23 00:25:53,030 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 00:25:53,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:25:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 00:25:53,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-12-23 00:25:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 00:25:53,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2020-12-23 00:25:53,040 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 130 [2020-12-23 00:25:53,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:53,041 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2020-12-23 00:25:53,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:25:53,041 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2020-12-23 00:25:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 00:25:53,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:53,043 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 10, 10, 7, 7, 7, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:53,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:25:53,260 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:53,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1108040979, now seen corresponding path program 17 times [2020-12-23 00:25:53,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:53,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595981812] [2020-12-23 00:25:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:53,280 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:53,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195105339] [2020-12-23 00:25:53,280 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:53,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 00:25:53,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:53,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:25:53,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2020-12-23 00:25:53,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595981812] [2020-12-23 00:25:53,792 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:53,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195105339] [2020-12-23 00:25:53,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:53,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:25:53,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61588232] [2020-12-23 00:25:53,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:25:53,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:53,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:25:53,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:25:53,794 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand 10 states. [2020-12-23 00:25:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:53,969 INFO L93 Difference]: Finished difference Result 244 states and 272 transitions. [2020-12-23 00:25:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:25:53,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 139 [2020-12-23 00:25:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:53,970 INFO L225 Difference]: With dead ends: 244 [2020-12-23 00:25:53,970 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 00:25:53,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:25:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 00:25:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2020-12-23 00:25:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-23 00:25:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2020-12-23 00:25:53,978 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 139 [2020-12-23 00:25:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:53,979 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2020-12-23 00:25:53,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:25:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2020-12-23 00:25:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 00:25:53,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:53,981 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 8, 8, 8, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:54,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:54,194 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1198235730, now seen corresponding path program 18 times [2020-12-23 00:25:54,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:54,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676970732] [2020-12-23 00:25:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:54,211 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:54,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284299927] [2020-12-23 00:25:54,211 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:54,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:25:54,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:54,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:25:54,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-23 00:25:54,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676970732] [2020-12-23 00:25:54,906 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:54,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284299927] [2020-12-23 00:25:54,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:54,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:25:54,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026491772] [2020-12-23 00:25:54,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:54,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:54,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:54,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:54,909 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand 7 states. [2020-12-23 00:25:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:54,936 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2020-12-23 00:25:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:54,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 148 [2020-12-23 00:25:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:54,938 INFO L225 Difference]: With dead ends: 192 [2020-12-23 00:25:54,938 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 00:25:54,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 00:25:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-12-23 00:25:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 00:25:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 164 transitions. [2020-12-23 00:25:54,946 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 164 transitions. Word has length 148 [2020-12-23 00:25:54,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:54,946 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 164 transitions. [2020-12-23 00:25:54,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:54,946 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 164 transitions. [2020-12-23 00:25:54,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 00:25:54,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:54,948 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:55,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 00:25:55,163 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:55,164 INFO L82 PathProgramCache]: Analyzing trace with hash -747380432, now seen corresponding path program 19 times [2020-12-23 00:25:55,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:55,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290863945] [2020-12-23 00:25:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:55,180 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:55,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813723547] [2020-12-23 00:25:55,181 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:55,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:25:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-23 00:25:55,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290863945] [2020-12-23 00:25:55,558 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:55,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813723547] [2020-12-23 00:25:55,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:55,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 00:25:55,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194971127] [2020-12-23 00:25:55,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:25:55,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:55,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:25:55,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:25:55,560 INFO L87 Difference]: Start difference. First operand 151 states and 164 transitions. Second operand 15 states. [2020-12-23 00:25:55,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:55,622 INFO L93 Difference]: Finished difference Result 278 states and 304 transitions. [2020-12-23 00:25:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:25:55,623 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 150 [2020-12-23 00:25:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:55,624 INFO L225 Difference]: With dead ends: 278 [2020-12-23 00:25:55,624 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 00:25:55,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:25:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 00:25:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-23 00:25:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 00:25:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 166 transitions. [2020-12-23 00:25:55,633 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 166 transitions. Word has length 150 [2020-12-23 00:25:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:55,633 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 166 transitions. [2020-12-23 00:25:55,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:25:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 166 transitions. [2020-12-23 00:25:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 00:25:55,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:55,635 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:55,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:55,849 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:55,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:55,850 INFO L82 PathProgramCache]: Analyzing trace with hash 881756338, now seen corresponding path program 20 times [2020-12-23 00:25:55,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:55,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330995464] [2020-12-23 00:25:55,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:55,866 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:55,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130459285] [2020-12-23 00:25:55,866 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:56,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:56,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:56,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:25:56,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-23 00:25:56,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330995464] [2020-12-23 00:25:56,285 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:56,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130459285] [2020-12-23 00:25:56,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:56,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 00:25:56,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677639738] [2020-12-23 00:25:56,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:25:56,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:56,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:25:56,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:25:56,287 INFO L87 Difference]: Start difference. First operand 153 states and 166 transitions. Second operand 16 states. [2020-12-23 00:25:56,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:56,343 INFO L93 Difference]: Finished difference Result 280 states and 306 transitions. [2020-12-23 00:25:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:25:56,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 152 [2020-12-23 00:25:56,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:56,345 INFO L225 Difference]: With dead ends: 280 [2020-12-23 00:25:56,345 INFO L226 Difference]: Without dead ends: 156 [2020-12-23 00:25:56,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:25:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-23 00:25:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-12-23 00:25:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 00:25:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 168 transitions. [2020-12-23 00:25:56,353 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 168 transitions. Word has length 152 [2020-12-23 00:25:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:56,354 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 168 transitions. [2020-12-23 00:25:56,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:25:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 168 transitions. [2020-12-23 00:25:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 00:25:56,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:56,355 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:56,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:25:56,569 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:56,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:56,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1180870732, now seen corresponding path program 21 times [2020-12-23 00:25:56,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:56,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477114172] [2020-12-23 00:25:56,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:56,590 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:56,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226794098] [2020-12-23 00:25:56,590 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true