/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/init-non-constant-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:49:14,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:49:14,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:49:14,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:49:14,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:49:14,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:49:14,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:49:14,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:49:14,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:49:14,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:49:14,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:49:14,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:49:14,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:49:14,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:49:14,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:49:14,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:49:14,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:49:14,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:49:14,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:49:14,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:49:14,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:49:14,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:49:14,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:49:14,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:49:14,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:49:14,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:49:14,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:49:14,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:49:14,748 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:49:14,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:49:14,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:49:14,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:49:14,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:49:14,777 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:49:14,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:49:14,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:49:14,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:49:14,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:49:14,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:49:14,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:49:14,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:49:14,779 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:49:14,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:49:14,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:49:14,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:49:14,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:49:14,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:49:14,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:49:14,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:49:14,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:49:14,781 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:49:14,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:49:14,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:49:14,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:49:14,782 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:49:15,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:49:15,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:49:15,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:49:15,177 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:49:15,178 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:49:15,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c [2021-01-06 10:49:15,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/513c7e78a/2136b885c68541669094420cb6c4a125/FLAG03bb19986 [2021-01-06 10:49:15,788 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:49:15,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c [2021-01-06 10:49:15,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/513c7e78a/2136b885c68541669094420cb6c4a125/FLAG03bb19986 [2021-01-06 10:49:16,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/513c7e78a/2136b885c68541669094420cb6c4a125 [2021-01-06 10:49:16,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:49:16,157 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:49:16,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:49:16,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:49:16,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:49:16,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:49:16" (1/1) ... [2021-01-06 10:49:16,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52bb1234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16, skipping insertion in model container [2021-01-06 10:49:16,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:49:16" (1/1) ... [2021-01-06 10:49:16,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:49:16,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:49:16,386 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/init-non-constant-3-u.c[333,346] 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[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]],[IdentifierExpression[~k~0,]]] left hand side expression in assignment: lhs: VariableLHS[~k~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,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:49:16,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:49:16,421 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:49:16,435 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/init-non-constant-3-u.c[333,346] 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[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IdentifierExpression[~j~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~k~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~k~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,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:49:16,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:49:16,466 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:49:16,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16 WrapperNode [2021-01-06 10:49:16,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:49:16,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:49:16,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:49:16,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:49:16,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16" (1/1) ... [2021-01-06 10:49:16,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16" (1/1) ... [2021-01-06 10:49:16,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:49:16,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:49:16,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:49:16,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:49:16,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16" (1/1) ... [2021-01-06 10:49:16,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16" (1/1) ... [2021-01-06 10:49:16,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16" (1/1) ... [2021-01-06 10:49:16,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16" (1/1) ... [2021-01-06 10:49:16,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16" (1/1) ... [2021-01-06 10:49:16,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16" (1/1) ... [2021-01-06 10:49:16,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16" (1/1) ... [2021-01-06 10:49:16,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:49:16,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:49:16,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:49:16,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:49:16,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:49:16,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:49:16,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:49:16,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:49:16,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:49:16,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:49:16,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:49:16,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:49:17,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:49:17,224 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 10:49:17,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:49:17 BoogieIcfgContainer [2021-01-06 10:49:17,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:49:17,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:49:17,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:49:17,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:49:17,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:49:16" (1/3) ... [2021-01-06 10:49:17,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eaa7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:49:17, skipping insertion in model container [2021-01-06 10:49:17,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:49:16" (2/3) ... [2021-01-06 10:49:17,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eaa7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:49:17, skipping insertion in model container [2021-01-06 10:49:17,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:49:17" (3/3) ... [2021-01-06 10:49:17,252 INFO L111 eAbstractionObserver]: Analyzing ICFG init-non-constant-3-u.c [2021-01-06 10:49:17,263 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:49:17,270 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:49:17,292 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:49:17,403 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:49:17,404 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:49:17,404 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:49:17,404 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:49:17,404 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:49:17,404 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:49:17,404 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:49:17,404 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:49:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 10:49:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:49:17,427 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:17,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:17,428 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:17,435 INFO L82 PathProgramCache]: Analyzing trace with hash 468841592, now seen corresponding path program 1 times [2021-01-06 10:49:17,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:17,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391278469] [2021-01-06 10:49:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:17,553 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:17,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63655541] [2021-01-06 10:49:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:49:17,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2021-01-06 10:49:17,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:49:17,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391278469] [2021-01-06 10:49:17,710 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:17,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63655541] [2021-01-06 10:49:17,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:49:17,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:49:17,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040708034] [2021-01-06 10:49:17,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:49:17,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:17,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:49:17,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:49:17,735 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 10:49:17,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:17,757 INFO L93 Difference]: Finished difference Result 40 states and 64 transitions. [2021-01-06 10:49:17,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:49:17,759 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 10:49:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:17,769 INFO L225 Difference]: With dead ends: 40 [2021-01-06 10:49:17,769 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 10:49:17,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:49:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 10:49:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 10:49:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:49:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-01-06 10:49:17,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2021-01-06 10:49:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:17,812 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-01-06 10:49:17,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:49:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-01-06 10:49:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:49:17,813 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:17,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:18,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:49:18,029 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:18,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:18,031 INFO L82 PathProgramCache]: Analyzing trace with hash -386465062, now seen corresponding path program 1 times [2021-01-06 10:49:18,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:18,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545293898] [2021-01-06 10:49:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:18,046 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:18,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401926808] [2021-01-06 10:49:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:49:18,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:49:18,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:49:18,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545293898] [2021-01-06 10:49:18,221 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:18,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401926808] [2021-01-06 10:49:18,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:49:18,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:49:18,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84013511] [2021-01-06 10:49:18,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:49:18,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:18,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:49:18,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:49:18,225 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 3 states. [2021-01-06 10:49:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:18,272 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-01-06 10:49:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:49:18,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 10:49:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:18,274 INFO L225 Difference]: With dead ends: 32 [2021-01-06 10:49:18,274 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 10:49:18,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:49:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 10:49:18,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2021-01-06 10:49:18,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:49:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-01-06 10:49:18,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2021-01-06 10:49:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:18,284 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-01-06 10:49:18,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:49:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-01-06 10:49:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:49:18,285 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:18,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:18,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:18,487 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:18,488 INFO L82 PathProgramCache]: Analyzing trace with hash 750439074, now seen corresponding path program 1 times [2021-01-06 10:49:18,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:18,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460685480] [2021-01-06 10:49:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:18,499 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:18,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325871079] [2021-01-06 10:49:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:49:18,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:49:18,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:49:18,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460685480] [2021-01-06 10:49:18,631 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:18,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325871079] [2021-01-06 10:49:18,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:49:18,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:49:18,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724082111] [2021-01-06 10:49:18,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:49:18,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:18,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:49:18,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:49:18,636 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2021-01-06 10:49:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:18,705 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-01-06 10:49:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:49:18,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 10:49:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:18,707 INFO L225 Difference]: With dead ends: 44 [2021-01-06 10:49:18,707 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:49:18,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:49:18,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:49:18,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-01-06 10:49:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 10:49:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-01-06 10:49:18,721 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2021-01-06 10:49:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:18,722 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-01-06 10:49:18,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:49:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-01-06 10:49:18,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:49:18,723 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:18,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:18,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:18,925 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:18,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1168938424, now seen corresponding path program 1 times [2021-01-06 10:49:18,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:18,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783215126] [2021-01-06 10:49:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:18,941 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:18,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485406586] [2021-01-06 10:49:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:49:19,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:49:19,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:49:19,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783215126] [2021-01-06 10:49:19,071 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:19,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485406586] [2021-01-06 10:49:19,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:49:19,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:49:19,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032690541] [2021-01-06 10:49:19,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:49:19,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:19,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:49:19,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:49:19,077 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2021-01-06 10:49:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:19,142 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-01-06 10:49:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:49:19,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-01-06 10:49:19,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:19,144 INFO L225 Difference]: With dead ends: 44 [2021-01-06 10:49:19,145 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:49:19,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:49:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:49:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-01-06 10:49:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 10:49:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-01-06 10:49:19,154 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2021-01-06 10:49:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:19,155 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-01-06 10:49:19,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:49:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-01-06 10:49:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:49:19,158 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:19,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:19,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:19,374 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:19,375 INFO L82 PathProgramCache]: Analyzing trace with hash 18975699, now seen corresponding path program 1 times [2021-01-06 10:49:19,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:19,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505823100] [2021-01-06 10:49:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:19,396 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:19,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75528635] [2021-01-06 10:49:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:49:19,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:49:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:49:19,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505823100] [2021-01-06 10:49:19,534 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:19,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75528635] [2021-01-06 10:49:19,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:49:19,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:49:19,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925980448] [2021-01-06 10:49:19,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:49:19,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:19,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:49:19,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:49:19,537 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 5 states. [2021-01-06 10:49:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:19,613 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-01-06 10:49:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:49:19,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 10:49:19,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:19,615 INFO L225 Difference]: With dead ends: 52 [2021-01-06 10:49:19,615 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:49:19,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:49:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:49:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-01-06 10:49:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:49:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-01-06 10:49:19,624 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2021-01-06 10:49:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:19,624 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-01-06 10:49:19,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:49:19,625 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-01-06 10:49:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:49:19,626 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:19,626 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:19,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:19,840 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:19,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1270130408, now seen corresponding path program 2 times [2021-01-06 10:49:19,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:19,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009323745] [2021-01-06 10:49:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:19,853 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:19,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654440190] [2021-01-06 10:49:19,854 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 [2021-01-06 10:49:19,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:49:19,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:49:19,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:49:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:49:20,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009323745] [2021-01-06 10:49:20,051 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:20,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654440190] [2021-01-06 10:49:20,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:49:20,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:49:20,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576267540] [2021-01-06 10:49:20,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:49:20,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:20,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:49:20,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:49:20,058 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2021-01-06 10:49:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:20,178 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-01-06 10:49:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:49:20,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 10:49:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:20,181 INFO L225 Difference]: With dead ends: 62 [2021-01-06 10:49:20,181 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 10:49:20,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:49:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 10:49:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-01-06 10:49:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:49:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-01-06 10:49:20,208 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2021-01-06 10:49:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:20,209 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-01-06 10:49:20,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:49:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-01-06 10:49:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 10:49:20,211 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:20,212 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:20,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:20,427 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:20,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1717253235, now seen corresponding path program 3 times [2021-01-06 10:49:20,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:20,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462246335] [2021-01-06 10:49:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:20,439 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:20,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274895931] [2021-01-06 10:49:20,439 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 [2021-01-06 10:49:20,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:49:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:49:20,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:49:20,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:49:20,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462246335] [2021-01-06 10:49:20,547 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:20,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274895931] [2021-01-06 10:49:20,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:49:20,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:49:20,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277967414] [2021-01-06 10:49:20,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:49:20,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:20,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:49:20,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:49:20,549 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2021-01-06 10:49:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:20,606 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-01-06 10:49:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:49:20,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-01-06 10:49:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:20,608 INFO L225 Difference]: With dead ends: 65 [2021-01-06 10:49:20,608 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 10:49:20,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:49:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 10:49:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2021-01-06 10:49:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:49:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-01-06 10:49:20,629 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2021-01-06 10:49:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:20,630 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-01-06 10:49:20,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:49:20,630 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-01-06 10:49:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:49:20,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:20,631 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:20,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:20,833 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:20,834 INFO L82 PathProgramCache]: Analyzing trace with hash -939344134, now seen corresponding path program 4 times [2021-01-06 10:49:20,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:20,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680388245] [2021-01-06 10:49:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:20,845 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:20,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169844522] [2021-01-06 10:49:20,845 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 [2021-01-06 10:49:20,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:49:20,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:49:20,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:49:20,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:49:21,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680388245] [2021-01-06 10:49:21,014 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:21,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169844522] [2021-01-06 10:49:21,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:49:21,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:49:21,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180643317] [2021-01-06 10:49:21,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:49:21,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:21,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:49:21,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:49:21,016 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2021-01-06 10:49:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:21,180 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2021-01-06 10:49:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:49:21,181 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2021-01-06 10:49:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:21,182 INFO L225 Difference]: With dead ends: 122 [2021-01-06 10:49:21,182 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:49:21,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:49:21,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:49:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2021-01-06 10:49:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:49:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2021-01-06 10:49:21,196 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 27 [2021-01-06 10:49:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:21,197 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2021-01-06 10:49:21,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:49:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2021-01-06 10:49:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 10:49:21,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:21,198 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:21,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:49:21,413 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:21,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:21,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2028398182, now seen corresponding path program 5 times [2021-01-06 10:49:21,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:21,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608155651] [2021-01-06 10:49:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:21,425 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:21,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160254432] [2021-01-06 10:49:21,426 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 [2021-01-06 10:49:21,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 10:49:21,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:49:21,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:49:21,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 10:49:21,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608155651] [2021-01-06 10:49:21,851 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:21,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160254432] [2021-01-06 10:49:21,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:49:21,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:49:21,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334770435] [2021-01-06 10:49:21,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:49:21,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:21,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:49:21,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:49:21,853 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 9 states. [2021-01-06 10:49:22,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:22,126 INFO L93 Difference]: Finished difference Result 170 states and 205 transitions. [2021-01-06 10:49:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:49:22,127 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2021-01-06 10:49:22,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:22,128 INFO L225 Difference]: With dead ends: 170 [2021-01-06 10:49:22,128 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 10:49:22,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:49:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 10:49:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2021-01-06 10:49:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 10:49:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2021-01-06 10:49:22,146 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 39 [2021-01-06 10:49:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:22,147 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2021-01-06 10:49:22,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:49:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2021-01-06 10:49:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:49:22,148 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:22,148 INFO L422 BasicCegarLoop]: trace histogram [18, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:22,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:22,358 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:22,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:22,359 INFO L82 PathProgramCache]: Analyzing trace with hash -804241990, now seen corresponding path program 6 times [2021-01-06 10:49:22,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:22,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442607189] [2021-01-06 10:49:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:22,370 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:22,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783906540] [2021-01-06 10:49:22,371 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 [2021-01-06 10:49:22,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 10:49:22,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:49:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:49:22,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 201 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-01-06 10:49:22,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442607189] [2021-01-06 10:49:22,530 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:22,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783906540] [2021-01-06 10:49:22,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:49:22,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:49:22,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720158563] [2021-01-06 10:49:22,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:49:22,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:22,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:49:22,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:49:22,533 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 7 states. [2021-01-06 10:49:22,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:22,609 INFO L93 Difference]: Finished difference Result 196 states and 248 transitions. [2021-01-06 10:49:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:49:22,610 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2021-01-06 10:49:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:22,611 INFO L225 Difference]: With dead ends: 196 [2021-01-06 10:49:22,611 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 10:49:22,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:49:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 10:49:22,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2021-01-06 10:49:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 10:49:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2021-01-06 10:49:22,645 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 51 [2021-01-06 10:49:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:22,646 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2021-01-06 10:49:22,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:49:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2021-01-06 10:49:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 10:49:22,647 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:22,648 INFO L422 BasicCegarLoop]: trace histogram [24, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:22,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:22,862 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:22,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:22,863 INFO L82 PathProgramCache]: Analyzing trace with hash 597276054, now seen corresponding path program 7 times [2021-01-06 10:49:22,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:22,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002927580] [2021-01-06 10:49:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:22,874 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:22,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922412440] [2021-01-06 10:49:22,874 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 [2021-01-06 10:49:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:49:22,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:49:22,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 10:49:23,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002927580] [2021-01-06 10:49:23,092 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:23,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922412440] [2021-01-06 10:49:23,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:49:23,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:49:23,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580345277] [2021-01-06 10:49:23,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:49:23,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:23,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:49:23,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:49:23,096 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 8 states. [2021-01-06 10:49:23,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:23,190 INFO L93 Difference]: Finished difference Result 227 states and 284 transitions. [2021-01-06 10:49:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:49:23,190 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2021-01-06 10:49:23,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:23,192 INFO L225 Difference]: With dead ends: 227 [2021-01-06 10:49:23,192 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 10:49:23,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:49:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 10:49:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2021-01-06 10:49:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 10:49:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 144 transitions. [2021-01-06 10:49:23,223 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 144 transitions. Word has length 57 [2021-01-06 10:49:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:23,223 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 144 transitions. [2021-01-06 10:49:23,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:49:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 144 transitions. [2021-01-06 10:49:23,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:49:23,224 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:23,225 INFO L422 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:23,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:49:23,438 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:23,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1929398778, now seen corresponding path program 8 times [2021-01-06 10:49:23,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:23,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971436573] [2021-01-06 10:49:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:23,449 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:23,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149978546] [2021-01-06 10:49:23,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:23,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:49:23,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:49:23,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:49:23,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-01-06 10:49:23,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971436573] [2021-01-06 10:49:23,671 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:23,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149978546] [2021-01-06 10:49:23,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:49:23,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:49:23,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423820275] [2021-01-06 10:49:23,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:49:23,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:23,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:49:23,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:49:23,674 INFO L87 Difference]: Start difference. First operand 117 states and 144 transitions. Second operand 9 states. [2021-01-06 10:49:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:23,786 INFO L93 Difference]: Finished difference Result 258 states and 320 transitions. [2021-01-06 10:49:23,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:49:23,786 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2021-01-06 10:49:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:23,788 INFO L225 Difference]: With dead ends: 258 [2021-01-06 10:49:23,788 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 10:49:23,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:49:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 10:49:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 132. [2021-01-06 10:49:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 10:49:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2021-01-06 10:49:23,807 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 63 [2021-01-06 10:49:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:23,807 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2021-01-06 10:49:23,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:49:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2021-01-06 10:49:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:49:23,808 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:23,808 INFO L422 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:24,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:24,023 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:24,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1555635498, now seen corresponding path program 9 times [2021-01-06 10:49:24,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:24,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83327924] [2021-01-06 10:49:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:24,035 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:24,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555297726] [2021-01-06 10:49:24,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:24,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:49:24,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:49:24,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:49:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 260 proven. 21 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2021-01-06 10:49:24,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83327924] [2021-01-06 10:49:24,595 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:24,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555297726] [2021-01-06 10:49:24,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:49:24,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:49:24,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549581448] [2021-01-06 10:49:24,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:49:24,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:24,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:49:24,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:49:24,599 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand 10 states. [2021-01-06 10:49:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:24,703 INFO L93 Difference]: Finished difference Result 289 states and 356 transitions. [2021-01-06 10:49:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:49:24,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2021-01-06 10:49:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:24,705 INFO L225 Difference]: With dead ends: 289 [2021-01-06 10:49:24,705 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 10:49:24,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:49:24,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 10:49:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 147. [2021-01-06 10:49:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 10:49:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 180 transitions. [2021-01-06 10:49:24,724 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 180 transitions. Word has length 69 [2021-01-06 10:49:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:24,724 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 180 transitions. [2021-01-06 10:49:24,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:49:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 180 transitions. [2021-01-06 10:49:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:49:24,725 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:24,725 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:24,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:49:24,942 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:24,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2132596282, now seen corresponding path program 10 times [2021-01-06 10:49:24,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:24,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112768086] [2021-01-06 10:49:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:24,952 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:24,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815298339] [2021-01-06 10:49:24,952 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 [2021-01-06 10:49:25,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:49:25,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:49:25,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:49:25,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 624 proven. 208 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-01-06 10:49:25,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112768086] [2021-01-06 10:49:25,293 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:25,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815298339] [2021-01-06 10:49:25,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:49:25,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 10:49:25,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38792658] [2021-01-06 10:49:25,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:49:25,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:25,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:49:25,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:49:25,296 INFO L87 Difference]: Start difference. First operand 147 states and 180 transitions. Second operand 14 states. [2021-01-06 10:49:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:25,609 INFO L93 Difference]: Finished difference Result 366 states and 441 transitions. [2021-01-06 10:49:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:49:25,610 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2021-01-06 10:49:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:25,614 INFO L225 Difference]: With dead ends: 366 [2021-01-06 10:49:25,614 INFO L226 Difference]: Without dead ends: 253 [2021-01-06 10:49:25,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:49:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-01-06 10:49:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 191. [2021-01-06 10:49:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 10:49:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 234 transitions. [2021-01-06 10:49:25,643 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 234 transitions. Word has length 75 [2021-01-06 10:49:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:25,644 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 234 transitions. [2021-01-06 10:49:25,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:49:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 234 transitions. [2021-01-06 10:49:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 10:49:25,646 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:25,646 INFO L422 BasicCegarLoop]: trace histogram [56, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:25,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:49:25,860 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:25,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1310270298, now seen corresponding path program 11 times [2021-01-06 10:49:25,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:25,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142430299] [2021-01-06 10:49:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:25,871 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:25,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890728297] [2021-01-06 10:49:25,872 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