/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/rangesum60.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:25:42,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:25:42,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:25:42,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:25:42,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:25:42,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:25:42,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:25:42,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:25:42,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:25:42,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:25:42,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:25:42,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:25:42,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:25:42,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:25:42,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:25:42,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:25:42,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:25:42,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:25:42,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:25:42,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:25:42,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:25:42,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:25:42,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:25:42,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:25:42,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:25:42,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:25:42,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:25:42,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:25:42,546 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 00:25:42,594 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:25:42,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:25:42,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:25:42,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:25:42,599 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:25:42,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:25:42,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:25:42,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:25:42,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:25:42,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:25:42,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:25:42,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:25:42,603 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:25:42,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:25:42,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:25:42,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:25:42,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:25:42,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:25:42,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:25:42,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:25:42,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:25:42,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:25:42,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:25:42,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:25:42,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:25:42,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:25:42,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:25:43,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:25:43,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:25:43,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:25:43,028 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:25:43,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum60.i [2020-12-23 00:25:43,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d509083d0/1f172a71ee2e4d06b11d8216429fda39/FLAG87f8eac8b [2020-12-23 00:25:43,776 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:25:43,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i [2020-12-23 00:25:43,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d509083d0/1f172a71ee2e4d06b11d8216429fda39/FLAG87f8eac8b [2020-12-23 00:25:44,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d509083d0/1f172a71ee2e4d06b11d8216429fda39 [2020-12-23 00:25:44,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:25:44,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:25:44,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:25:44,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:25:44,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:25:44,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:25:44" (1/1) ... [2020-12-23 00:25:44,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba39f10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44, skipping insertion in model container [2020-12-23 00:25:44,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:25:44" (1/1) ... [2020-12-23 00:25:44,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:25:44,137 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[59]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:25:44,330 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/rangesum60.i[1465,1478] [2020-12-23 00:25:44,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:25:44,357 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[236],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:25:44,411 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/rangesum60.i[1465,1478] [2020-12-23 00:25:44,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:25:44,434 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:25:44,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44 WrapperNode [2020-12-23 00:25:44,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:25:44,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:25:44,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:25:44,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:25:44,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44" (1/1) ... [2020-12-23 00:25:44,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44" (1/1) ... [2020-12-23 00:25:44,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:25:44,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:25:44,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:25:44,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:25:44,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44" (1/1) ... [2020-12-23 00:25:44,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44" (1/1) ... [2020-12-23 00:25:44,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44" (1/1) ... [2020-12-23 00:25:44,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44" (1/1) ... [2020-12-23 00:25:44,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44" (1/1) ... [2020-12-23 00:25:44,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44" (1/1) ... [2020-12-23 00:25:44,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44" (1/1) ... [2020-12-23 00:25:44,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:25:44,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:25:44,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:25:44,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:25:44,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44" (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 00:25:44,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:25:44,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:25:44,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:25:44,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:25:44,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:25:44,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:25:44,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:25:45,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:25:45,165 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 00:25:45,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:25:45 BoogieIcfgContainer [2020-12-23 00:25:45,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:25:45,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:25:45,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:25:45,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:25:45,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:25:44" (1/3) ... [2020-12-23 00:25:45,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24217257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:25:45, skipping insertion in model container [2020-12-23 00:25:45,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:44" (2/3) ... [2020-12-23 00:25:45,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24217257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:25:45, skipping insertion in model container [2020-12-23 00:25:45,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:25:45" (3/3) ... [2020-12-23 00:25:45,182 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2020-12-23 00:25:45,193 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:25:45,198 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:25:45,218 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:25:45,261 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:25:45,261 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:25:45,262 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:25:45,262 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:25:45,262 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:25:45,262 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:25:45,262 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:25:45,262 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:25:45,283 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-23 00:25:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:25:45,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:45,291 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 00:25:45,292 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:45,299 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2020-12-23 00:25:45,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:45,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627851025] [2020-12-23 00:25:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:45,518 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 00:25:45,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627851025] [2020-12-23 00:25:45,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:45,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:25:45,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125077737] [2020-12-23 00:25:45,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:25:45,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:45,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:25:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:25:45,543 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-23 00:25:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:45,564 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2020-12-23 00:25:45,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:25:45,565 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-23 00:25:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:45,575 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:25:45,575 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:25:45,579 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 00:25:45,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:25:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 00:25:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:25:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-23 00:25:45,617 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2020-12-23 00:25:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:45,618 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-23 00:25:45,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:25:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-23 00:25:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:25:45,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:45,619 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 00:25:45,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:25:45,620 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2020-12-23 00:25:45,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:45,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611504850] [2020-12-23 00:25:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:45,638 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:45,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612718959] [2020-12-23 00:25:45,639 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 00:25:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:45,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:45,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:45,806 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 00:25:45,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611504850] [2020-12-23 00:25:45,807 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:45,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612718959] [2020-12-23 00:25:45,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:45,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:25:45,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256468564] [2020-12-23 00:25:45,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:45,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:45,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:25:45,811 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2020-12-23 00:25:45,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:45,837 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-12-23 00:25:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:45,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:25:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:45,840 INFO L225 Difference]: With dead ends: 50 [2020-12-23 00:25:45,840 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 00:25:45,842 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 00:25:45,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 00:25:45,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 00:25:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:25:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-12-23 00:25:45,852 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2020-12-23 00:25:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:45,852 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-12-23 00:25:45,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:45,853 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-12-23 00:25:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:25:45,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:45,853 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 00:25:46,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:25:46,055 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:46,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2020-12-23 00:25:46,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:46,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928677775] [2020-12-23 00:25:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:46,136 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 00:25:46,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928677775] [2020-12-23 00:25:46,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603434074] [2020-12-23 00:25:46,137 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 00:25:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:46,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:46,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:46,231 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 00:25:46,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:46,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:46,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844536242] [2020-12-23 00:25:46,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:46,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:46,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:46,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:46,234 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-12-23 00:25:46,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:46,284 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2020-12-23 00:25:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:46,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:25:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:46,286 INFO L225 Difference]: With dead ends: 57 [2020-12-23 00:25:46,286 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 00:25:46,287 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 00:25:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 00:25:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-23 00:25:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:25:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-12-23 00:25:46,298 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2020-12-23 00:25:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:46,298 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-12-23 00:25:46,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-12-23 00:25:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:25:46,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:46,300 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 00:25:46,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:46,514 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:46,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:46,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2020-12-23 00:25:46,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:46,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065720414] [2020-12-23 00:25:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:46,596 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 00:25:46,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065720414] [2020-12-23 00:25:46,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147666737] [2020-12-23 00:25:46,597 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 00:25:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:46,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:46,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:46,708 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 00:25:46,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:46,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:46,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470151953] [2020-12-23 00:25:46,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:46,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:46,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:46,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:46,714 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2020-12-23 00:25:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:46,729 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-12-23 00:25:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:46,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-23 00:25:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:46,730 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:25:46,731 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:25:46,731 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 00:25:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:25:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-23 00:25:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:25:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-12-23 00:25:46,737 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2020-12-23 00:25:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:46,738 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-12-23 00:25:46,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-12-23 00:25:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:25:46,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:46,740 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 00:25:46,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:46,955 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:46,957 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2020-12-23 00:25:46,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:46,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617647392] [2020-12-23 00:25:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:47,035 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 00:25:47,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617647392] [2020-12-23 00:25:47,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450528476] [2020-12-23 00:25:47,036 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 00:25:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:47,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:47,140 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 00:25:47,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:47,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:47,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716883833] [2020-12-23 00:25:47,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:47,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:47,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:47,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:47,143 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-12-23 00:25:47,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:47,183 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2020-12-23 00:25:47,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:47,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-23 00:25:47,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:47,185 INFO L225 Difference]: With dead ends: 78 [2020-12-23 00:25:47,185 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 00:25:47,186 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 00:25:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 00:25:47,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-12-23 00:25:47,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:25:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-12-23 00:25:47,198 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2020-12-23 00:25:47,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:47,198 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-12-23 00:25:47,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-12-23 00:25:47,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:25:47,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:47,200 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 00:25:47,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:47,416 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:47,417 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2020-12-23 00:25:47,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:47,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495512176] [2020-12-23 00:25:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:47,487 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 00:25:47,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495512176] [2020-12-23 00:25:47,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745125717] [2020-12-23 00:25:47,491 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 00:25:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:47,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:47,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:47,639 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 00:25:47,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:47,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:25:47,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308495569] [2020-12-23 00:25:47,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:47,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:47,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:47,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:47,642 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2020-12-23 00:25:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:47,665 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2020-12-23 00:25:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:47,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-23 00:25:47,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:47,667 INFO L225 Difference]: With dead ends: 90 [2020-12-23 00:25:47,667 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:25:47,668 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 00:25:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:25:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:25:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:25:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-12-23 00:25:47,675 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2020-12-23 00:25:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:47,675 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-12-23 00:25:47,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-12-23 00:25:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:25:47,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:47,676 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 00:25:47,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:25:47,891 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:47,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:47,893 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2020-12-23 00:25:47,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:47,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244033484] [2020-12-23 00:25:47,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:47,962 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 00:25:47,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244033484] [2020-12-23 00:25:47,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124755115] [2020-12-23 00:25:47,963 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 00:25:48,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:25:48,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:48,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:25:48,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:48,138 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 00:25:48,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:48,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-12-23 00:25:48,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665761701] [2020-12-23 00:25:48,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:25:48,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:48,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:25:48,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:25:48,141 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-12-23 00:25:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:48,216 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2020-12-23 00:25:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:25:48,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-23 00:25:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:48,218 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:25:48,219 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 00:25:48,219 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 00:25:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 00:25:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-12-23 00:25:48,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 00:25:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-12-23 00:25:48,230 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2020-12-23 00:25:48,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:48,231 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-12-23 00:25:48,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:25:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-12-23 00:25:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:25:48,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:48,233 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 00:25:48,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:48,449 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:48,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:48,450 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2020-12-23 00:25:48,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:48,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894970105] [2020-12-23 00:25:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:48,523 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 00:25:48,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894970105] [2020-12-23 00:25:48,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144072132] [2020-12-23 00:25:48,524 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 00:25:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:48,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:48,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:48,678 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 00:25:48,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:48,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:25:48,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177333537] [2020-12-23 00:25:48,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:48,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:48,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:48,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:48,682 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2020-12-23 00:25:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:48,776 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2020-12-23 00:25:48,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:48,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-23 00:25:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:48,782 INFO L225 Difference]: With dead ends: 162 [2020-12-23 00:25:48,782 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 00:25:48,783 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 00:25:48,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 00:25:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-23 00:25:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:25:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-12-23 00:25:48,808 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2020-12-23 00:25:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:48,809 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-12-23 00:25:48,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-12-23 00:25:48,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:25:48,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:48,816 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 00:25:49,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:49,017 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:49,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2020-12-23 00:25:49,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:49,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166333689] [2020-12-23 00:25:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:49,035 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:49,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108184989] [2020-12-23 00:25:49,036 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 00:25:49,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:49,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:49,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:49,188 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 00:25:49,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166333689] [2020-12-23 00:25:49,189 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:49,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108184989] [2020-12-23 00:25:49,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:49,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:49,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145900563] [2020-12-23 00:25:49,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:49,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:49,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:49,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:49,192 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2020-12-23 00:25:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:49,216 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2020-12-23 00:25:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:49,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-23 00:25:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:49,218 INFO L225 Difference]: With dead ends: 174 [2020-12-23 00:25:49,218 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:25:49,222 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 00:25:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:25:49,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:25:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:25:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2020-12-23 00:25:49,240 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2020-12-23 00:25:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:49,241 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2020-12-23 00:25:49,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:49,243 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2020-12-23 00:25:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:25:49,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:49,245 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 00:25:49,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:25:49,446 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:49,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2020-12-23 00:25:49,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:49,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125489133] [2020-12-23 00:25:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:49,507 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 00:25:49,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125489133] [2020-12-23 00:25:49,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:49,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:25:49,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721102315] [2020-12-23 00:25:49,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:49,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:49,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:49,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:49,512 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2020-12-23 00:25:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:49,591 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2020-12-23 00:25:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:49,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-23 00:25:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:49,593 INFO L225 Difference]: With dead ends: 177 [2020-12-23 00:25:49,593 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 00:25:49,594 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 00:25:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 00:25:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2020-12-23 00:25:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:25:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-12-23 00:25:49,612 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2020-12-23 00:25:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:49,612 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-12-23 00:25:49,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-12-23 00:25:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 00:25:49,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:49,615 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 00:25:49,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 00:25:49,616 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:49,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:49,616 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2020-12-23 00:25:49,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:49,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219178027] [2020-12-23 00:25:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:49,644 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:49,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699412804] [2020-12-23 00:25:49,648 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 00:25:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:49,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:25:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:49,840 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 00:25:49,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219178027] [2020-12-23 00:25:49,841 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:49,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699412804] [2020-12-23 00:25:49,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:49,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:25:49,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743172592] [2020-12-23 00:25:49,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:49,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:49,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:49,843 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2020-12-23 00:25:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:49,871 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2020-12-23 00:25:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:49,872 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-23 00:25:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:49,872 INFO L225 Difference]: With dead ends: 158 [2020-12-23 00:25:49,872 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:25:49,873 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 00:25:49,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:25:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 00:25:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:25:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-12-23 00:25:49,878 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2020-12-23 00:25:49,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:49,878 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-12-23 00:25:49,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-12-23 00:25:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:25:49,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:49,879 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 00:25:50,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:50,095 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:50,096 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2020-12-23 00:25:50,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:50,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893661760] [2020-12-23 00:25:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:50,123 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:50,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793992966] [2020-12-23 00:25:50,125 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 00:25:50,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:50,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:50,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:25:50,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:50,326 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 00:25:50,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893661760] [2020-12-23 00:25:50,327 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:50,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793992966] [2020-12-23 00:25:50,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:50,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:25:50,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015815276] [2020-12-23 00:25:50,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:25:50,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:50,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:25:50,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:25:50,329 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 8 states. [2020-12-23 00:25:50,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:50,359 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-12-23 00:25:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:25:50,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-23 00:25:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:50,361 INFO L225 Difference]: With dead ends: 160 [2020-12-23 00:25:50,361 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 00:25:50,362 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 00:25:50,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 00:25:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-23 00:25:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 00:25:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-12-23 00:25:50,367 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2020-12-23 00:25:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:50,367 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-12-23 00:25:50,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:25:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-12-23 00:25:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:25:50,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:50,369 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 00:25:50,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:50,583 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:50,584 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2020-12-23 00:25:50,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:50,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835603993] [2020-12-23 00:25:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:50,601 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:50,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855703285] [2020-12-23 00:25:50,602 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 00:25:50,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:25:50,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:50,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:50,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:50,741 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 00:25:50,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835603993] [2020-12-23 00:25:50,742 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:50,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855703285] [2020-12-23 00:25:50,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:50,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:25:50,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638385017] [2020-12-23 00:25:50,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:50,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:50,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:50,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:50,744 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 4 states. [2020-12-23 00:25:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:50,773 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-12-23 00:25:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:50,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-12-23 00:25:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:50,774 INFO L225 Difference]: With dead ends: 116 [2020-12-23 00:25:50,774 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 00:25:50,775 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 00:25:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 00:25:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-12-23 00:25:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:25:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-12-23 00:25:50,778 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2020-12-23 00:25:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:50,779 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-12-23 00:25:50,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:50,779 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-12-23 00:25:50,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:25:50,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:50,780 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 00:25:50,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:25:50,993 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:50,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:50,994 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2020-12-23 00:25:50,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:50,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96616716] [2020-12-23 00:25:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:51,008 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:51,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882438086] [2020-12-23 00:25:51,008 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 00:25:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:51,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:25:51,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:51,175 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 00:25:51,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96616716] [2020-12-23 00:25:51,176 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:51,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882438086] [2020-12-23 00:25:51,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:51,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:25:51,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663620254] [2020-12-23 00:25:51,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:25:51,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:51,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:25:51,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:25:51,178 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 9 states. [2020-12-23 00:25:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:51,207 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-12-23 00:25:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:25:51,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-23 00:25:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:51,208 INFO L225 Difference]: With dead ends: 106 [2020-12-23 00:25:51,209 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:25:51,209 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 00:25:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:25:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-23 00:25:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 00:25:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-12-23 00:25:51,212 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2020-12-23 00:25:51,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:51,213 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-12-23 00:25:51,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:25:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-12-23 00:25:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 00:25:51,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:51,214 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 00:25:51,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:25:51,429 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:51,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2020-12-23 00:25:51,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:51,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725913140] [2020-12-23 00:25:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:51,445 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:51,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848849609] [2020-12-23 00:25:51,445 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 00:25:51,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:51,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:51,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:25:51,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:51,725 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 00:25:51,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725913140] [2020-12-23 00:25:51,725 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:51,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848849609] [2020-12-23 00:25:51,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:51,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:25:51,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876365019] [2020-12-23 00:25:51,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:25:51,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:51,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:25:51,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:25:51,727 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-12-23 00:25:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:51,763 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-12-23 00:25:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:25:51,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-12-23 00:25:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:51,764 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:25:51,764 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 00:25:51,768 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 00:25:51,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 00:25:51,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-23 00:25:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:25:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-12-23 00:25:51,771 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2020-12-23 00:25:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:51,771 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-12-23 00:25:51,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:25:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-12-23 00:25:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 00:25:51,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:51,772 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 00:25:51,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:25:51,981 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:51,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2020-12-23 00:25:51,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:51,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115004774] [2020-12-23 00:25:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:52,017 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:52,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507456865] [2020-12-23 00:25:52,018 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 00:25:52,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:25:52,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:52,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:52,149 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 00:25:52,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115004774] [2020-12-23 00:25:52,149 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:52,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507456865] [2020-12-23 00:25:52,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:52,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 00:25:52,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772570159] [2020-12-23 00:25:52,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:52,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:52,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:52,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:52,155 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 4 states. [2020-12-23 00:25:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:52,177 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-12-23 00:25:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:52,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-12-23 00:25:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:52,179 INFO L225 Difference]: With dead ends: 82 [2020-12-23 00:25:52,179 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 00:25:52,179 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 00:25:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 00:25:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-23 00:25:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:25:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-23 00:25:52,183 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2020-12-23 00:25:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:52,183 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-23 00:25:52,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-23 00:25:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 00:25:52,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:52,184 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 00:25:52,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:52,398 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:52,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:52,399 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2020-12-23 00:25:52,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:52,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757648774] [2020-12-23 00:25:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:52,414 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:52,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24487697] [2020-12-23 00:25:52,414 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 00:25:52,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:52,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:52,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:52,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:52,558 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 00:25:52,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757648774] [2020-12-23 00:25:52,559 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:52,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24487697] [2020-12-23 00:25:52,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:52,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:25:52,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235666570] [2020-12-23 00:25:52,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:52,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:52,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:52,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:52,560 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2020-12-23 00:25:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:52,637 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-12-23 00:25:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:25:52,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-23 00:25:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:52,638 INFO L225 Difference]: With dead ends: 117 [2020-12-23 00:25:52,638 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 00:25:52,639 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 00:25:52,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 00:25:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-23 00:25:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 00:25:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-12-23 00:25:52,643 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2020-12-23 00:25:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:52,644 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-12-23 00:25:52,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-12-23 00:25:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:25:52,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:52,645 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 00:25:52,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:25:52,859 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:52,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:52,860 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2020-12-23 00:25:52,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:52,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939713620] [2020-12-23 00:25:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:52,873 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:52,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866565133] [2020-12-23 00:25:52,873 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 00:25:53,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 00:25:53,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:53,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:53,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:53,119 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 00:25:53,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939713620] [2020-12-23 00:25:53,119 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:53,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866565133] [2020-12-23 00:25:53,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:53,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:53,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136303348] [2020-12-23 00:25:53,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:53,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:53,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:53,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:53,122 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 6 states. [2020-12-23 00:25:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:53,207 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2020-12-23 00:25:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:53,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-12-23 00:25:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:53,209 INFO L225 Difference]: With dead ends: 132 [2020-12-23 00:25:53,209 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:25:53,209 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 00:25:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:25:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-12-23 00:25:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:25:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-12-23 00:25:53,214 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2020-12-23 00:25:53,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:53,214 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-12-23 00:25:53,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-12-23 00:25:53,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:25:53,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:53,215 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 00:25:53,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:25:53,431 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:53,432 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2020-12-23 00:25:53,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:53,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650084287] [2020-12-23 00:25:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:53,445 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:53,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010033508] [2020-12-23 00:25:53,446 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 00:25:53,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:25:53,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:53,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:53,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:53,844 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 00:25:53,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650084287] [2020-12-23 00:25:53,844 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:53,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010033508] [2020-12-23 00:25:53,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:53,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:25:53,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439706904] [2020-12-23 00:25:53,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:53,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:53,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:53,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:53,846 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2020-12-23 00:25:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:53,869 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-12-23 00:25:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:25:53,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-12-23 00:25:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:53,870 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:25:53,870 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:25:53,871 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 00:25:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:25:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 00:25:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:25:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-12-23 00:25:53,875 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2020-12-23 00:25:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:53,875 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-12-23 00:25:53,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-12-23 00:25:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 00:25:53,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:53,876 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 00:25:54,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:54,090 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:54,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:54,091 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2020-12-23 00:25:54,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:54,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355396505] [2020-12-23 00:25:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:54,104 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:54,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305752525] [2020-12-23 00:25:54,104 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 00:25:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:54,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:25:54,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:54,319 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 00:25:54,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355396505] [2020-12-23 00:25:54,320 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:54,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305752525] [2020-12-23 00:25:54,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:54,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:25:54,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214696662] [2020-12-23 00:25:54,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:25:54,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:54,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:25:54,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:25:54,322 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 11 states. [2020-12-23 00:25:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:54,359 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-12-23 00:25:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:25:54,360 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-12-23 00:25:54,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:54,360 INFO L225 Difference]: With dead ends: 154 [2020-12-23 00:25:54,361 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 00:25:54,361 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 00:25:54,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 00:25:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-23 00:25:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 00:25:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-12-23 00:25:54,389 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2020-12-23 00:25:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:54,390 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-12-23 00:25:54,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:25:54,391 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-12-23 00:25:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 00:25:54,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:54,391 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 00:25:54,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:54,606 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:54,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2020-12-23 00:25:54,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:54,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944290023] [2020-12-23 00:25:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:54,634 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:54,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887903316] [2020-12-23 00:25:54,634 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 00:25:54,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:54,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:25:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:54,901 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 00:25:54,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944290023] [2020-12-23 00:25:54,902 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:54,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887903316] [2020-12-23 00:25:54,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:54,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:25:54,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258603537] [2020-12-23 00:25:54,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:25:54,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:54,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:25:54,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:25:54,904 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 12 states. [2020-12-23 00:25:54,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:54,941 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-12-23 00:25:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:25:54,941 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-12-23 00:25:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:54,942 INFO L225 Difference]: With dead ends: 156 [2020-12-23 00:25:54,942 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 00:25:54,943 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 00:25:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 00:25:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-23 00:25:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 00:25:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2020-12-23 00:25:54,948 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2020-12-23 00:25:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:54,948 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2020-12-23 00:25:54,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:25:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2020-12-23 00:25:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 00:25:54,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:54,949 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 00:25:55,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:55,165 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:55,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:55,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2020-12-23 00:25:55,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:55,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055891714] [2020-12-23 00:25:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:55,187 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:55,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286293666] [2020-12-23 00:25:55,187 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 00:25:55,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:25:55,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:55,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:55,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:55,860 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 00:25:55,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055891714] [2020-12-23 00:25:55,860 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:55,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286293666] [2020-12-23 00:25:55,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:55,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:25:55,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330454234] [2020-12-23 00:25:55,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:55,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:55,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:55,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:55,862 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 5 states. [2020-12-23 00:25:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:55,945 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-12-23 00:25:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:25:55,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-12-23 00:25:55,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:55,946 INFO L225 Difference]: With dead ends: 153 [2020-12-23 00:25:55,946 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:25:55,947 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 00:25:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:25:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-12-23 00:25:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 00:25:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-12-23 00:25:55,952 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2020-12-23 00:25:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:55,952 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-12-23 00:25:55,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-12-23 00:25:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 00:25:55,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:55,953 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 00:25:56,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:25:56,167 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:56,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:56,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2020-12-23 00:25:56,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:56,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085612418] [2020-12-23 00:25:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:56,182 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:56,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020886357] [2020-12-23 00:25:56,183 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 00:25:56,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:56,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:56,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:25:56,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 00:25:56,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085612418] [2020-12-23 00:25:56,490 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:56,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020886357] [2020-12-23 00:25:56,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:56,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:25:56,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202169321] [2020-12-23 00:25:56,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:25:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:56,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:25:56,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:25:56,492 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 13 states. [2020-12-23 00:25:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:56,540 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2020-12-23 00:25:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:25:56,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-12-23 00:25:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:56,542 INFO L225 Difference]: With dead ends: 176 [2020-12-23 00:25:56,542 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 00:25:56,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 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 00:25:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 00:25:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-12-23 00:25:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 00:25:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-12-23 00:25:56,548 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 97 [2020-12-23 00:25:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:56,548 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-12-23 00:25:56,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:25:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-12-23 00:25:56,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 00:25:56,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:56,549 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 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 00:25:56,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:25:56,765 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash -839941325, now seen corresponding path program 11 times [2020-12-23 00:25:56,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:56,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515029627] [2020-12-23 00:25:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:56,779 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:56,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039016169] [2020-12-23 00:25:56,779 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 00:25:57,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 00:25:57,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:57,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:25:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-23 00:25:57,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515029627] [2020-12-23 00:25:57,190 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:57,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039016169] [2020-12-23 00:25:57,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:57,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:25:57,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279348099] [2020-12-23 00:25:57,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:57,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:57,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:57,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:57,192 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 7 states. [2020-12-23 00:25:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:57,287 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2020-12-23 00:25:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:57,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-12-23 00:25:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:57,292 INFO L225 Difference]: With dead ends: 175 [2020-12-23 00:25:57,292 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 00:25:57,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 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 00:25:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 00:25:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2020-12-23 00:25:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 00:25:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2020-12-23 00:25:57,298 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 99 [2020-12-23 00:25:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:57,298 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2020-12-23 00:25:57,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2020-12-23 00:25:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-23 00:25:57,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:57,300 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 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 00:25:57,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:57,516 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:57,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:57,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1344803056, now seen corresponding path program 12 times [2020-12-23 00:25:57,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:57,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419451485] [2020-12-23 00:25:57,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:57,535 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:57,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141600158] [2020-12-23 00:25:57,535 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 00:25:58,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:25:58,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:58,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:58,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-12-23 00:25:58,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419451485] [2020-12-23 00:25:58,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:58,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141600158] [2020-12-23 00:25:58,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:58,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:58,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775659459] [2020-12-23 00:25:58,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:58,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:58,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:58,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:58,236 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 6 states. [2020-12-23 00:25:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:58,257 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2020-12-23 00:25:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:58,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-12-23 00:25:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:58,260 INFO L225 Difference]: With dead ends: 140 [2020-12-23 00:25:58,260 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 00:25:58,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 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 00:25:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 00:25:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-12-23 00:25:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 00:25:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-12-23 00:25:58,265 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 108 [2020-12-23 00:25:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:58,266 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-12-23 00:25:58,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-12-23 00:25:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 00:25:58,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:58,267 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 5, 5, 5, 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 00:25:58,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:25:58,481 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:58,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2042426738, now seen corresponding path program 13 times [2020-12-23 00:25:58,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:58,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469837840] [2020-12-23 00:25:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:58,497 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:58,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161447638] [2020-12-23 00:25:58,498 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 00:25:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:58,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:25:58,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 00:25:58,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469837840] [2020-12-23 00:25:58,797 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:58,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161447638] [2020-12-23 00:25:58,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:58,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 00:25:58,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322320059] [2020-12-23 00:25:58,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:25:58,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:58,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:25:58,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:25:58,798 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 14 states. [2020-12-23 00:25:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:58,851 INFO L93 Difference]: Finished difference Result 200 states and 220 transitions. [2020-12-23 00:25:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:25:58,855 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 110 [2020-12-23 00:25:58,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:58,856 INFO L225 Difference]: With dead ends: 200 [2020-12-23 00:25:58,856 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 00:25:58,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 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 00:25:58,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 00:25:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-23 00:25:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 00:25:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2020-12-23 00:25:58,862 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 110 [2020-12-23 00:25:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:58,862 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2020-12-23 00:25:58,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:25:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2020-12-23 00:25:58,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 00:25:58,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:58,864 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 7, 7, 7, 5, 5, 5, 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 00:25:59,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:59,080 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1265026804, now seen corresponding path program 14 times [2020-12-23 00:25:59,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:59,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357312383] [2020-12-23 00:25:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:59,093 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:59,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866003476] [2020-12-23 00:25:59,094 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 00:25:59,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:59,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:59,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:25:59,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 00:25:59,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357312383] [2020-12-23 00:25:59,447 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:59,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866003476] [2020-12-23 00:25:59,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:59,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 00:25:59,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274229337] [2020-12-23 00:25:59,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:25:59,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:59,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:25:59,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:25:59,450 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand 15 states. [2020-12-23 00:25:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:59,508 INFO L93 Difference]: Finished difference Result 202 states and 222 transitions. [2020-12-23 00:25:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:25:59,513 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 112 [2020-12-23 00:25:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:59,514 INFO L225 Difference]: With dead ends: 202 [2020-12-23 00:25:59,514 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 00:25:59,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 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 00:25:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 00:25:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-23 00:25:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 00:25:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-12-23 00:25:59,521 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 112 [2020-12-23 00:25:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:59,521 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-12-23 00:25:59,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:25:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-12-23 00:25:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 00:25:59,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:59,523 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 7, 7, 7, 5, 5, 5, 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 00:25:59,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:25:59,739 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1507999734, now seen corresponding path program 15 times [2020-12-23 00:25:59,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:59,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575031544] [2020-12-23 00:25:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:59,755 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:59,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445848441] [2020-12-23 00:25:59,755 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 00:26:00,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:26:00,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:00,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:26:00,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-12-23 00:26:00,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575031544] [2020-12-23 00:26:00,197 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:00,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445848441] [2020-12-23 00:26:00,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:00,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:26:00,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102447164] [2020-12-23 00:26:00,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:26:00,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:26:00,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:26:00,198 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 6 states. [2020-12-23 00:26:00,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:00,306 INFO L93 Difference]: Finished difference Result 193 states and 218 transitions. [2020-12-23 00:26:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:26:00,306 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-23 00:26:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:00,307 INFO L225 Difference]: With dead ends: 193 [2020-12-23 00:26:00,307 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 00:26:00,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 00:26:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 00:26:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2020-12-23 00:26:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 00:26:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2020-12-23 00:26:00,314 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 114 [2020-12-23 00:26:00,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:00,314 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2020-12-23 00:26:00,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:26:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2020-12-23 00:26:00,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-23 00:26:00,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:00,316 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 8, 8, 8, 5, 5, 5, 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 00:26:00,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:26:00,529 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:00,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:00,530 INFO L82 PathProgramCache]: Analyzing trace with hash 631086347, now seen corresponding path program 16 times [2020-12-23 00:26:00,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:00,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926352874] [2020-12-23 00:26:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:00,543 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:00,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349655463] [2020-12-23 00:26:00,544 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 00:26:00,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:00,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:00,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:26:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:26:00,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926352874] [2020-12-23 00:26:00,800 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:00,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349655463] [2020-12-23 00:26:00,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:00,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:26:00,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920741986] [2020-12-23 00:26:00,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:26:00,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:00,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:26:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:26:00,802 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 9 states. [2020-12-23 00:26:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:00,947 INFO L93 Difference]: Finished difference Result 226 states and 268 transitions. [2020-12-23 00:26:00,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:26:00,948 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-12-23 00:26:00,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:00,949 INFO L225 Difference]: With dead ends: 226 [2020-12-23 00:26:00,949 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 00:26:00,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 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 00:26:00,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 00:26:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2020-12-23 00:26:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 00:26:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2020-12-23 00:26:00,956 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 123 [2020-12-23 00:26:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:00,957 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2020-12-23 00:26:00,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:26:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2020-12-23 00:26:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 00:26:00,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:00,958 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:01,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:26:01,174 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:01,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:01,175 INFO L82 PathProgramCache]: Analyzing trace with hash -466148810, now seen corresponding path program 17 times [2020-12-23 00:26:01,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:01,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619050625] [2020-12-23 00:26:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:01,192 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:01,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604806087] [2020-12-23 00:26:01,192 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 00:26:01,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-23 00:26:01,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:01,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:26:01,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 96 proven. 40 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2020-12-23 00:26:01,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619050625] [2020-12-23 00:26:01,692 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:01,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604806087] [2020-12-23 00:26:01,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:01,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:26:01,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474971370] [2020-12-23 00:26:01,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:26:01,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:01,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:26:01,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:26:01,694 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand 8 states. [2020-12-23 00:26:01,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:01,808 INFO L93 Difference]: Finished difference Result 270 states and 316 transitions. [2020-12-23 00:26:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:26:01,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 150 [2020-12-23 00:26:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:01,809 INFO L225 Difference]: With dead ends: 270 [2020-12-23 00:26:01,809 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 00:26:01,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 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 00:26:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 00:26:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2020-12-23 00:26:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 00:26:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2020-12-23 00:26:01,817 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 150 [2020-12-23 00:26:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:01,817 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2020-12-23 00:26:01,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:26:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2020-12-23 00:26:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-23 00:26:01,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:01,819 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:02,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:02,034 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:02,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:02,035 INFO L82 PathProgramCache]: Analyzing trace with hash -755311091, now seen corresponding path program 18 times [2020-12-23 00:26:02,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:02,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691566742] [2020-12-23 00:26:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:02,052 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:02,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378626596] [2020-12-23 00:26:02,052 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 00:26:02,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:26:02,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:02,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:26:02,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2020-12-23 00:26:02,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691566742] [2020-12-23 00:26:02,775 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:02,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378626596] [2020-12-23 00:26:02,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:02,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:26:02,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006351039] [2020-12-23 00:26:02,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:26:02,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:02,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:26:02,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:26:02,776 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand 7 states. [2020-12-23 00:26:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:02,801 INFO L93 Difference]: Finished difference Result 206 states and 235 transitions. [2020-12-23 00:26:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:26:02,802 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 159 [2020-12-23 00:26:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:02,803 INFO L225 Difference]: With dead ends: 206 [2020-12-23 00:26:02,803 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 00:26:02,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 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 00:26:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 00:26:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-12-23 00:26:02,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 00:26:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2020-12-23 00:26:02,810 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 159 [2020-12-23 00:26:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:02,810 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2020-12-23 00:26:02,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:26:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2020-12-23 00:26:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-23 00:26:02,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:02,812 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:03,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 00:26:03,027 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:03,028 INFO L82 PathProgramCache]: Analyzing trace with hash -902385397, now seen corresponding path program 19 times [2020-12-23 00:26:03,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:03,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208578224] [2020-12-23 00:26:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:03,043 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:03,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138036146] [2020-12-23 00:26:03,043 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 00:26:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:26:03,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2020-12-23 00:26:03,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208578224] [2020-12-23 00:26:03,430 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:03,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138036146] [2020-12-23 00:26:03,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:03,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 00:26:03,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033836089] [2020-12-23 00:26:03,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:26:03,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:03,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:26:03,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:26:03,432 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand 16 states. [2020-12-23 00:26:03,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:03,490 INFO L93 Difference]: Finished difference Result 298 states and 342 transitions. [2020-12-23 00:26:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:26:03,492 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2020-12-23 00:26:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:03,493 INFO L225 Difference]: With dead ends: 298 [2020-12-23 00:26:03,493 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 00:26:03,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 146 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 00:26:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 00:26:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-12-23 00:26:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 00:26:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2020-12-23 00:26:03,501 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 161 [2020-12-23 00:26:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:03,502 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2020-12-23 00:26:03,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:26:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2020-12-23 00:26:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-23 00:26:03,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:03,503 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:03,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:03,715 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:03,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1609802825, now seen corresponding path program 20 times [2020-12-23 00:26:03,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:03,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077004443] [2020-12-23 00:26:03,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:03,733 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:03,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151063651] [2020-12-23 00:26:03,733 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 00:26:03,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:03,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:03,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:26:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2020-12-23 00:26:04,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077004443] [2020-12-23 00:26:04,217 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:04,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151063651] [2020-12-23 00:26:04,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:04,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 00:26:04,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707374854] [2020-12-23 00:26:04,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:26:04,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:04,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:26:04,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:26:04,218 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand 17 states. [2020-12-23 00:26:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:04,283 INFO L93 Difference]: Finished difference Result 300 states and 344 transitions. [2020-12-23 00:26:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:26:04,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 163 [2020-12-23 00:26:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:04,289 INFO L225 Difference]: With dead ends: 300 [2020-12-23 00:26:04,289 INFO L226 Difference]: Without dead ends: 167 [2020-12-23 00:26:04,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:26:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-23 00:26:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-12-23 00:26:04,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 00:26:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 188 transitions. [2020-12-23 00:26:04,299 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 188 transitions. Word has length 163 [2020-12-23 00:26:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:04,300 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 188 transitions. [2020-12-23 00:26:04,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:26:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 188 transitions. [2020-12-23 00:26:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-23 00:26:04,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:04,301 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:04,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:26:04,505 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:04,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:04,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2051063815, now seen corresponding path program 21 times [2020-12-23 00:26:04,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:04,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965127475] [2020-12-23 00:26:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:04,533 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:04,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429073326] [2020-12-23 00:26:04,534 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 [2020-12-23 00:26:04,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:26:04,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:04,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:26:04,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-12-23 00:26:05,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965127475] [2020-12-23 00:26:05,080 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:05,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429073326] [2020-12-23 00:26:05,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:05,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:26:05,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269306249] [2020-12-23 00:26:05,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:26:05,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:05,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:26:05,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:26:05,082 INFO L87 Difference]: Start difference. First operand 166 states and 188 transitions. Second operand 8 states. [2020-12-23 00:26:05,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:05,118 INFO L93 Difference]: Finished difference Result 212 states and 241 transitions. [2020-12-23 00:26:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:26:05,118 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 165 [2020-12-23 00:26:05,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:05,120 INFO L225 Difference]: With dead ends: 212 [2020-12-23 00:26:05,120 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 00:26:05,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 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 00:26:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 00:26:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-12-23 00:26:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-23 00:26:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2020-12-23 00:26:05,128 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 165 [2020-12-23 00:26:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:05,129 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2020-12-23 00:26:05,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:26:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2020-12-23 00:26:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-23 00:26:05,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:05,130 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:05,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 00:26:05,338 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:05,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1215562619, now seen corresponding path program 22 times [2020-12-23 00:26:05,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:05,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659299012] [2020-12-23 00:26:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:05,361 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:05,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524317997] [2020-12-23 00:26:05,362 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:05,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:05,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:05,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:26:05,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-23 00:26:05,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659299012] [2020-12-23 00:26:05,747 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:05,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524317997] [2020-12-23 00:26:05,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:05,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 00:26:05,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639172648] [2020-12-23 00:26:05,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:26:05,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:05,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:26:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:26:05,748 INFO L87 Difference]: Start difference. First operand 168 states and 190 transitions. Second operand 14 states. [2020-12-23 00:26:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:06,033 INFO L93 Difference]: Finished difference Result 316 states and 385 transitions. [2020-12-23 00:26:06,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:26:06,034 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 167 [2020-12-23 00:26:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:06,035 INFO L225 Difference]: With dead ends: 316 [2020-12-23 00:26:06,036 INFO L226 Difference]: Without dead ends: 219 [2020-12-23 00:26:06,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 154 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 00:26:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-23 00:26:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2020-12-23 00:26:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-23 00:26:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 250 transitions. [2020-12-23 00:26:06,044 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 250 transitions. Word has length 167 [2020-12-23 00:26:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:06,044 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 250 transitions. [2020-12-23 00:26:06,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:26:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 250 transitions. [2020-12-23 00:26:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-23 00:26:06,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:06,046 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 15, 15, 11, 11, 11, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:06,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:26:06,262 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:06,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1651850840, now seen corresponding path program 23 times [2020-12-23 00:26:06,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:06,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519417474] [2020-12-23 00:26:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:06,279 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:06,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882252941] [2020-12-23 00:26:06,280 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:07,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 00:26:07,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:26:07,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 213 proven. 57 refuted. 0 times theorem prover too weak. 1266 trivial. 0 not checked. [2020-12-23 00:26:07,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519417474] [2020-12-23 00:26:07,761 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:07,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882252941] [2020-12-23 00:26:07,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:07,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:26:07,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798468781] [2020-12-23 00:26:07,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:26:07,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:07,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:26:07,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:26:07,763 INFO L87 Difference]: Start difference. First operand 213 states and 250 transitions. Second operand 9 states. [2020-12-23 00:26:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:07,882 INFO L93 Difference]: Finished difference Result 387 states and 463 transitions. [2020-12-23 00:26:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:26:07,882 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 212 [2020-12-23 00:26:07,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:07,884 INFO L225 Difference]: With dead ends: 387 [2020-12-23 00:26:07,884 INFO L226 Difference]: Without dead ends: 225 [2020-12-23 00:26:07,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 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 00:26:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-23 00:26:07,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-12-23 00:26:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-23 00:26:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2020-12-23 00:26:07,894 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 212 [2020-12-23 00:26:07,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:07,894 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2020-12-23 00:26:07,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:26:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2020-12-23 00:26:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-23 00:26:07,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:07,896 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 15, 15, 11, 11, 11, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:08,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 00:26:08,111 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:08,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:08,112 INFO L82 PathProgramCache]: Analyzing trace with hash 20245667, now seen corresponding path program 24 times [2020-12-23 00:26:08,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:08,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911671859] [2020-12-23 00:26:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:08,131 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:08,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017899755] [2020-12-23 00:26:08,131 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:08,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:26:08,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:26:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2020-12-23 00:26:09,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911671859] [2020-12-23 00:26:09,014 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:09,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017899755] [2020-12-23 00:26:09,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:09,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:26:09,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63747369] [2020-12-23 00:26:09,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:26:09,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:09,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:26:09,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:26:09,016 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand 9 states. [2020-12-23 00:26:09,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:09,055 INFO L93 Difference]: Finished difference Result 286 states and 335 transitions. [2020-12-23 00:26:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:26:09,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 221 [2020-12-23 00:26:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:09,059 INFO L225 Difference]: With dead ends: 286 [2020-12-23 00:26:09,059 INFO L226 Difference]: Without dead ends: 225 [2020-12-23 00:26:09,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 213 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 00:26:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-23 00:26:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2020-12-23 00:26:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-23 00:26:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 261 transitions. [2020-12-23 00:26:09,068 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 261 transitions. Word has length 221 [2020-12-23 00:26:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:09,068 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 261 transitions. [2020-12-23 00:26:09,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:26:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 261 transitions. [2020-12-23 00:26:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-12-23 00:26:09,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:09,070 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 15, 15, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:09,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:26:09,285 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:09,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2073585185, now seen corresponding path program 25 times [2020-12-23 00:26:09,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:09,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895599449] [2020-12-23 00:26:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:09,304 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:09,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124848849] [2020-12-23 00:26:09,304 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:09,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:26:09,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1480 trivial. 0 not checked. [2020-12-23 00:26:09,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895599449] [2020-12-23 00:26:09,812 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:09,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124848849] [2020-12-23 00:26:09,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:09,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-23 00:26:09,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933809126] [2020-12-23 00:26:09,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:26:09,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:09,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:26:09,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:26:09,814 INFO L87 Difference]: Start difference. First operand 224 states and 261 transitions. Second operand 18 states. [2020-12-23 00:26:09,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:09,881 INFO L93 Difference]: Finished difference Result 418 states and 492 transitions. [2020-12-23 00:26:09,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:26:09,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 223 [2020-12-23 00:26:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:09,884 INFO L225 Difference]: With dead ends: 418 [2020-12-23 00:26:09,884 INFO L226 Difference]: Without dead ends: 227 [2020-12-23 00:26:09,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:26:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-23 00:26:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2020-12-23 00:26:09,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-23 00:26:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2020-12-23 00:26:09,893 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 223 [2020-12-23 00:26:09,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:09,893 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2020-12-23 00:26:09,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:26:09,893 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2020-12-23 00:26:09,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-23 00:26:09,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:09,895 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 16, 16, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:10,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:26:10,111 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:10,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:10,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1482678049, now seen corresponding path program 26 times [2020-12-23 00:26:10,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:10,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605133333] [2020-12-23 00:26:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:10,131 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:10,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92073810] [2020-12-23 00:26:10,131 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:10,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:10,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:10,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:26:10,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1480 trivial. 0 not checked. [2020-12-23 00:26:10,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605133333] [2020-12-23 00:26:10,654 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:26:10,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92073810] [2020-12-23 00:26:10,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:10,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 00:26:10,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590623159] [2020-12-23 00:26:10,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:26:10,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:10,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:26:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:26:10,656 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand 19 states. [2020-12-23 00:26:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:10,716 INFO L93 Difference]: Finished difference Result 420 states and 494 transitions. [2020-12-23 00:26:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:26:10,717 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 225 [2020-12-23 00:26:10,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:10,718 INFO L225 Difference]: With dead ends: 420 [2020-12-23 00:26:10,718 INFO L226 Difference]: Without dead ends: 229 [2020-12-23 00:26:10,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:26:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-23 00:26:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2020-12-23 00:26:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-12-23 00:26:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 265 transitions. [2020-12-23 00:26:10,727 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 265 transitions. Word has length 225 [2020-12-23 00:26:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:10,728 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 265 transitions. [2020-12-23 00:26:10,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:26:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 265 transitions. [2020-12-23 00:26:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-12-23 00:26:10,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:10,729 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:10,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:26:10,943 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:10,944 INFO L82 PathProgramCache]: Analyzing trace with hash -257678307, now seen corresponding path program 27 times [2020-12-23 00:26:10,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:10,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962747848] [2020-12-23 00:26:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:10,963 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:26:10,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601392104] [2020-12-23 00:26:10,963 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true