/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-multidimensional/transpose-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:57:42,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:57:42,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:57:42,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:57:42,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:57:42,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:57:42,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:57:42,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:57:42,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:57:42,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:57:42,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:57:42,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:57:42,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:57:42,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:57:42,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:57:42,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:57:42,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:57:42,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:57:42,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:57:42,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:57:42,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:57:42,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:57:42,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:57:42,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:57:42,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:57:42,732 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 00:57:42,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:57:42,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:57:42,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:57:42,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:57:42,761 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:57:42,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:57:42,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:57:42,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:57:42,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:57:42,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:57:42,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:57:42,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:57:42,763 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:57:42,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:57:42,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:57:42,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:57:42,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:57:42,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:57:42,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:57:42,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:57:42,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:57:42,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:57:42,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:57:42,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:57:42,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:57:42,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:57:43,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:57:43,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:57:43,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:57:43,187 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:57:43,188 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:57:43,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/transpose-u.c [2020-12-23 00:57:43,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5505c2d0a/4473008c5edf4e22a0883e88740f8697/FLAG62bc23afd [2020-12-23 00:57:43,849 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:57:43,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/transpose-u.c [2020-12-23 00:57:43,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5505c2d0a/4473008c5edf4e22a0883e88740f8697/FLAG62bc23afd [2020-12-23 00:57:44,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5505c2d0a/4473008c5edf4e22a0883e88740f8697 [2020-12-23 00:57:44,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:57:44,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:57:44,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:57:44,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:57:44,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:57:44,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:57:44" (1/1) ... [2020-12-23 00:57:44,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1561a7cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44, skipping insertion in model container [2020-12-23 00:57:44,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:57:44" (1/1) ... [2020-12-23 00:57:44,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:57:44,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:57:44,471 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~C~0,],[IdentifierExpression[~j~0,]]],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2020-12-23 00:57:44,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:57:44,517 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:57:44,531 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#C~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#C~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~j~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2020-12-23 00:57:44,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:57:44,559 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:57:44,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44 WrapperNode [2020-12-23 00:57:44,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:57:44,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:57:44,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:57:44,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:57:44,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44" (1/1) ... [2020-12-23 00:57:44,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44" (1/1) ... [2020-12-23 00:57:44,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:57:44,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:57:44,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:57:44,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:57:44,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44" (1/1) ... [2020-12-23 00:57:44,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44" (1/1) ... [2020-12-23 00:57:44,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44" (1/1) ... [2020-12-23 00:57:44,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44" (1/1) ... [2020-12-23 00:57:44,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44" (1/1) ... [2020-12-23 00:57:44,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44" (1/1) ... [2020-12-23 00:57:44,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44" (1/1) ... [2020-12-23 00:57:44,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:57:44,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:57:44,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:57:44,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:57:44,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44" (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 00:57:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:57:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:57:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:57:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:57:44,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:57:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:57:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:57:45,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:57:45,012 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 00:57:45,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:57:45 BoogieIcfgContainer [2020-12-23 00:57:45,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:57:45,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:57:45,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:57:45,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:57:45,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:57:44" (1/3) ... [2020-12-23 00:57:45,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7948fa36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:57:45, skipping insertion in model container [2020-12-23 00:57:45,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:44" (2/3) ... [2020-12-23 00:57:45,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7948fa36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:57:45, skipping insertion in model container [2020-12-23 00:57:45,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:57:45" (3/3) ... [2020-12-23 00:57:45,023 INFO L111 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2020-12-23 00:57:45,030 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:57:45,035 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:57:45,056 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:57:45,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:57:45,085 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:57:45,085 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:57:45,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:57:45,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:57:45,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:57:45,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:57:45,086 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:57:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-23 00:57:45,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:57:45,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:45,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:45,116 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:45,122 INFO L82 PathProgramCache]: Analyzing trace with hash 74794164, now seen corresponding path program 1 times [2020-12-23 00:57:45,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:45,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833232088] [2020-12-23 00:57:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:45,247 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:45,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145220607] [2020-12-23 00:57:45,248 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 00:57:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:57:45,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:45,437 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 00:57:45,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833232088] [2020-12-23 00:57:45,438 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:45,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145220607] [2020-12-23 00:57:45,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:57:45,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:57:45,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133231404] [2020-12-23 00:57:45,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:57:45,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:45,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:57:45,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:57:45,463 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-12-23 00:57:45,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:45,523 INFO L93 Difference]: Finished difference Result 48 states and 76 transitions. [2020-12-23 00:57:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:57:45,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 00:57:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:45,534 INFO L225 Difference]: With dead ends: 48 [2020-12-23 00:57:45,534 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 00:57:45,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 00:57:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 00:57:45,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-23 00:57:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 00:57:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-12-23 00:57:45,573 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2020-12-23 00:57:45,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:45,574 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-12-23 00:57:45,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:57:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-12-23 00:57:45,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:57:45,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:45,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:45,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 00:57:45,781 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:45,783 INFO L82 PathProgramCache]: Analyzing trace with hash 876166624, now seen corresponding path program 1 times [2020-12-23 00:57:45,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:45,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008941081] [2020-12-23 00:57:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:45,803 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:45,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765516167] [2020-12-23 00:57:45,803 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 00:57:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:57:45,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:57:45,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008941081] [2020-12-23 00:57:45,929 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:45,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765516167] [2020-12-23 00:57:45,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:57:45,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:57:45,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306269569] [2020-12-23 00:57:45,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:57:45,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:45,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:57:45,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:45,933 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2020-12-23 00:57:45,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:45,991 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-12-23 00:57:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:57:45,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 00:57:45,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:45,993 INFO L225 Difference]: With dead ends: 49 [2020-12-23 00:57:45,993 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:57:45,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 00:57:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:57:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-12-23 00:57:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:57:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-23 00:57:46,001 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 13 [2020-12-23 00:57:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:46,001 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-23 00:57:46,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:57:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-23 00:57:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:57:46,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:46,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:46,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:46,218 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:46,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:46,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1798277150, now seen corresponding path program 1 times [2020-12-23 00:57:46,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:46,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910859191] [2020-12-23 00:57:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:46,235 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:46,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489062379] [2020-12-23 00:57:46,235 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 00:57:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:46,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:57:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:57:46,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910859191] [2020-12-23 00:57:46,333 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:46,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489062379] [2020-12-23 00:57:46,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:46,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:57:46,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640710584] [2020-12-23 00:57:46,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:57:46,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:46,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:57:46,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:57:46,336 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-12-23 00:57:46,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:46,402 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-12-23 00:57:46,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:57:46,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 00:57:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:46,404 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:57:46,404 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 00:57:46,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 00:57:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 00:57:46,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-12-23 00:57:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:57:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-23 00:57:46,412 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2020-12-23 00:57:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:46,413 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-23 00:57:46,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:57:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-23 00:57:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:57:46,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:46,414 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:46,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:46,628 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:46,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash 746666340, now seen corresponding path program 2 times [2020-12-23 00:57:46,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:46,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412459629] [2020-12-23 00:57:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:46,642 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:46,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748938549] [2020-12-23 00:57:46,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:46,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:57:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:57:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:46,719 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 00:57:46,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412459629] [2020-12-23 00:57:46,719 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:46,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748938549] [2020-12-23 00:57:46,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:57:46,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:57:46,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625419991] [2020-12-23 00:57:46,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:57:46,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:46,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:57:46,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:46,722 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2020-12-23 00:57:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:46,770 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-12-23 00:57:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:57:46,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-23 00:57:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:46,772 INFO L225 Difference]: With dead ends: 68 [2020-12-23 00:57:46,772 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 00:57:46,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 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 00:57:46,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 00:57:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2020-12-23 00:57:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:57:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-12-23 00:57:46,780 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2020-12-23 00:57:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:46,780 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-23 00:57:46,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:57:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-12-23 00:57:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 00:57:46,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:46,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:46,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:46,997 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash 528247649, now seen corresponding path program 1 times [2020-12-23 00:57:46,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:46,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444369271] [2020-12-23 00:57:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:47,010 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:47,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552816003] [2020-12-23 00:57:47,011 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 00:57:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:47,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:57:47,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:57:47,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444369271] [2020-12-23 00:57:47,187 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:47,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552816003] [2020-12-23 00:57:47,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:47,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:57:47,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983450604] [2020-12-23 00:57:47,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:57:47,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:47,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:57:47,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:57:47,191 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2020-12-23 00:57:47,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:47,280 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-12-23 00:57:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:57:47,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-23 00:57:47,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:47,282 INFO L225 Difference]: With dead ends: 76 [2020-12-23 00:57:47,282 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 00:57:47,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 00:57:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 00:57:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-12-23 00:57:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:57:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-12-23 00:57:47,308 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 22 [2020-12-23 00:57:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:47,308 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-12-23 00:57:47,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:57:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-12-23 00:57:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:57:47,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:47,310 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:47,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:47,525 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:47,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:47,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1276111829, now seen corresponding path program 2 times [2020-12-23 00:57:47,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:47,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885214707] [2020-12-23 00:57:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:47,538 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:47,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276329307] [2020-12-23 00:57:47,538 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 00:57:47,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:57:47,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:47,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:57:47,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:57:47,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885214707] [2020-12-23 00:57:47,687 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:47,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276329307] [2020-12-23 00:57:47,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:47,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:57:47,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663818593] [2020-12-23 00:57:47,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:57:47,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:47,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:57:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:57:47,689 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2020-12-23 00:57:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:47,775 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-12-23 00:57:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:57:47,776 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-12-23 00:57:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:47,777 INFO L225 Difference]: With dead ends: 92 [2020-12-23 00:57:47,777 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 00:57:47,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 00:57:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 00:57:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-12-23 00:57:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 00:57:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-12-23 00:57:47,784 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2020-12-23 00:57:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:47,784 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-12-23 00:57:47,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:57:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-12-23 00:57:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:57:47,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:47,786 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:47,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:47,998 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2013197213, now seen corresponding path program 3 times [2020-12-23 00:57:47,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:48,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240135712] [2020-12-23 00:57:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:48,010 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:48,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718742705] [2020-12-23 00:57:48,011 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 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 00:57:48,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:57:48,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:48,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:57:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:57:48,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240135712] [2020-12-23 00:57:48,136 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:48,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718742705] [2020-12-23 00:57:48,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:48,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:57:48,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303695258] [2020-12-23 00:57:48,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:57:48,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:48,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:57:48,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:57:48,139 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 5 states. [2020-12-23 00:57:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:48,217 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2020-12-23 00:57:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:57:48,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-12-23 00:57:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:48,220 INFO L225 Difference]: With dead ends: 152 [2020-12-23 00:57:48,220 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 00:57:48,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 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 00:57:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 00:57:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 63. [2020-12-23 00:57:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:57:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-12-23 00:57:48,232 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 28 [2020-12-23 00:57:48,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:48,232 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-12-23 00:57:48,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:57:48,232 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-12-23 00:57:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:57:48,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:48,234 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:48,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:48,448 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2132369004, now seen corresponding path program 4 times [2020-12-23 00:57:48,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:48,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898187036] [2020-12-23 00:57:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:48,462 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:48,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532662279] [2020-12-23 00:57:48,462 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 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 00:57:48,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:57:48,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:48,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:57:48,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-23 00:57:48,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898187036] [2020-12-23 00:57:48,716 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:48,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532662279] [2020-12-23 00:57:48,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:48,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:57:48,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365612827] [2020-12-23 00:57:48,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:57:48,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:48,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:57:48,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:57:48,719 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 10 states. [2020-12-23 00:57:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:48,941 INFO L93 Difference]: Finished difference Result 204 states and 236 transitions. [2020-12-23 00:57:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:57:48,941 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-12-23 00:57:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:48,943 INFO L225 Difference]: With dead ends: 204 [2020-12-23 00:57:48,943 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 00:57:48,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:57:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 00:57:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 81. [2020-12-23 00:57:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 00:57:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-12-23 00:57:48,976 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 46 [2020-12-23 00:57:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:48,978 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-12-23 00:57:48,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:57:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-12-23 00:57:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 00:57:48,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:48,983 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:49,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 00:57:49,184 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1584178365, now seen corresponding path program 5 times [2020-12-23 00:57:49,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:49,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710692466] [2020-12-23 00:57:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:49,197 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:49,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992735592] [2020-12-23 00:57:49,198 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 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 00:59:29,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 00:59:29,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:59:30,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:59:30,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:59:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 129 proven. 16 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2020-12-23 00:59:30,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710692466] [2020-12-23 00:59:30,153 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:59:30,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992735592] [2020-12-23 00:59:30,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:59:30,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:59:30,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584522515] [2020-12-23 00:59:30,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:59:30,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:59:30,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:59:30,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:59:30,157 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 8 states. [2020-12-23 00:59:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:59:30,246 INFO L93 Difference]: Finished difference Result 179 states and 206 transitions. [2020-12-23 00:59:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:59:30,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-12-23 00:59:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:59:30,248 INFO L225 Difference]: With dead ends: 179 [2020-12-23 00:59:30,248 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:59:30,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 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 00:59:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:59:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2020-12-23 00:59:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 00:59:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2020-12-23 00:59:30,261 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 64 [2020-12-23 00:59:30,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:59:30,262 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2020-12-23 00:59:30,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:59:30,262 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2020-12-23 00:59:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:59:30,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:59:30,263 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:59:30,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:59:30,478 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:59:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:59:30,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1333255625, now seen corresponding path program 6 times [2020-12-23 00:59:30,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:59:30,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056950156] [2020-12-23 00:59:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:59:30,490 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:59:30,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113890061] [2020-12-23 00:59:30,491 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 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 00:59:32,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-23 00:59:32,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:59:32,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:59:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:59:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 189 proven. 25 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2020-12-23 00:59:32,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056950156] [2020-12-23 00:59:32,731 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:59:32,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113890061] [2020-12-23 00:59:32,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:59:32,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:59:32,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123826866] [2020-12-23 00:59:32,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:59:32,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:59:32,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:59:32,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:59:32,735 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand 9 states. [2020-12-23 00:59:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:59:32,837 INFO L93 Difference]: Finished difference Result 205 states and 233 transitions. [2020-12-23 00:59:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:59:32,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-12-23 00:59:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:59:32,839 INFO L225 Difference]: With dead ends: 205 [2020-12-23 00:59:32,839 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 00:59:32,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 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 00:59:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 00:59:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 107. [2020-12-23 00:59:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 00:59:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2020-12-23 00:59:32,851 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 73 [2020-12-23 00:59:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:59:32,851 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2020-12-23 00:59:32,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:59:32,851 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2020-12-23 00:59:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:59:32,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:59:32,853 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:59:33,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:59:33,069 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:59:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:59:33,070 INFO L82 PathProgramCache]: Analyzing trace with hash -180833735, now seen corresponding path program 7 times [2020-12-23 00:59:33,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:59:33,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974494896] [2020-12-23 00:59:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:59:33,081 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:59:33,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679806851] [2020-12-23 00:59:33,082 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 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 00:59:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:59:33,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:59:33,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:59:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 173 proven. 36 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2020-12-23 00:59:33,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974494896] [2020-12-23 00:59:33,356 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:59:33,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679806851] [2020-12-23 00:59:33,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:59:33,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:59:33,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062134838] [2020-12-23 00:59:33,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:59:33,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:59:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:59:33,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:59:33,359 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand 10 states. [2020-12-23 00:59:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:59:33,490 INFO L93 Difference]: Finished difference Result 231 states and 260 transitions. [2020-12-23 00:59:33,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:59:33,490 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-12-23 00:59:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:59:33,492 INFO L225 Difference]: With dead ends: 231 [2020-12-23 00:59:33,492 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 00:59:33,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 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 00:59:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 00:59:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 120. [2020-12-23 00:59:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:59:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2020-12-23 00:59:33,503 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 82 [2020-12-23 00:59:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:59:33,504 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2020-12-23 00:59:33,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:59:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2020-12-23 00:59:33,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:59:33,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:59:33,505 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:59:33,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:59:33,719 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:59:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:59:33,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1535621189, now seen corresponding path program 8 times [2020-12-23 00:59:33,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:59:33,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216416900] [2020-12-23 00:59:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:59:33,731 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:59:33,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322393729] [2020-12-23 00:59:33,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:59:33,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:59:33,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:59:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:59:33,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:59:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 229 proven. 49 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2020-12-23 00:59:34,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216416900] [2020-12-23 00:59:34,054 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:59:34,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322393729] [2020-12-23 00:59:34,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:59:34,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:59:34,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829007572] [2020-12-23 00:59:34,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:59:34,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:59:34,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:59:34,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:59:34,057 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand 11 states. [2020-12-23 00:59:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:59:34,184 INFO L93 Difference]: Finished difference Result 257 states and 287 transitions. [2020-12-23 00:59:34,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:59:34,184 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 91 [2020-12-23 00:59:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:59:34,186 INFO L225 Difference]: With dead ends: 257 [2020-12-23 00:59:34,186 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 00:59:34,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 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 00:59:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 00:59:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 133. [2020-12-23 00:59:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 00:59:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2020-12-23 00:59:34,199 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 91 [2020-12-23 00:59:34,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:59:34,199 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2020-12-23 00:59:34,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:59:34,199 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2020-12-23 00:59:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 00:59:34,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:59:34,201 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:59:34,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:59:34,416 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:59:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:59:34,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1761064011, now seen corresponding path program 9 times [2020-12-23 00:59:34,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:59:34,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730889655] [2020-12-23 00:59:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:59:34,438 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:59:34,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848737036] [2020-12-23 00:59:34,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:59:57,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 00:59:57,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:59:57,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:59:57,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:59:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 167 proven. 36 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2020-12-23 00:59:57,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730889655] [2020-12-23 00:59:57,631 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:59:57,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848737036] [2020-12-23 00:59:57,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:59:57,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:59:57,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205413134] [2020-12-23 00:59:57,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:59:57,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:59:57,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:59:57,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:59:57,633 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand 12 states. [2020-12-23 00:59:57,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:59:57,788 INFO L93 Difference]: Finished difference Result 283 states and 314 transitions. [2020-12-23 00:59:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:59:57,789 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2020-12-23 00:59:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:59:57,790 INFO L225 Difference]: With dead ends: 283 [2020-12-23 00:59:57,790 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 00:59:57,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 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 00:59:57,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 00:59:57,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 146. [2020-12-23 00:59:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-23 00:59:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 163 transitions. [2020-12-23 00:59:57,802 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 163 transitions. Word has length 100 [2020-12-23 00:59:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:59:57,803 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 163 transitions. [2020-12-23 00:59:57,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:59:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 163 transitions. [2020-12-23 00:59:57,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-23 00:59:57,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:59:57,804 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:59:58,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:59:58,018 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:59:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:59:58,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1696137535, now seen corresponding path program 10 times [2020-12-23 00:59:58,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:59:58,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102986017] [2020-12-23 00:59:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:59:58,030 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:59:58,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51803898] [2020-12-23 00:59:58,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:59:58,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:59:58,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:59:58,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:59:58,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:59:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1239 backedges. 36 proven. 318 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-12-23 00:59:58,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102986017] [2020-12-23 00:59:58,437 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:59:58,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51803898] [2020-12-23 00:59:58,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:59:58,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 00:59:58,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579322405] [2020-12-23 00:59:58,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:59:58,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:59:58,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:59:58,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:59:58,440 INFO L87 Difference]: Start difference. First operand 146 states and 163 transitions. Second operand 16 states. [2020-12-23 00:59:58,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:59:58,857 INFO L93 Difference]: Finished difference Result 470 states and 534 transitions. [2020-12-23 00:59:58,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 00:59:58,857 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-12-23 00:59:58,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:59:58,860 INFO L225 Difference]: With dead ends: 470 [2020-12-23 00:59:58,860 INFO L226 Difference]: Without dead ends: 390 [2020-12-23 00:59:58,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:59:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-12-23 00:59:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 179. [2020-12-23 00:59:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 00:59:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 198 transitions. [2020-12-23 00:59:58,881 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 198 transitions. Word has length 109 [2020-12-23 00:59:58,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:59:58,881 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 198 transitions. [2020-12-23 00:59:58,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:59:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 198 transitions. [2020-12-23 00:59:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-23 00:59:58,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:59:58,883 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:59:59,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:59:59,097 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:59:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:59:59,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1127728112, now seen corresponding path program 11 times [2020-12-23 00:59:59,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:59:59,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294375097] [2020-12-23 00:59:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:59:59,110 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:59:59,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714612401] [2020-12-23 00:59:59,111 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 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