/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-examples/standard_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:52:06,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:52:06,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:52:06,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:52:06,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:52:06,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:52:06,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:52:06,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:52:06,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:52:06,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:52:06,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:52:06,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:52:06,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:52:06,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:52:06,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:52:06,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:52:06,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:52:06,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:52:06,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:52:06,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:52:06,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:52:06,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:52:06,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:52:06,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:52:06,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 09:52:06,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 09:52:06,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 09:52:06,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 09:52:06,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 09:52:06,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 09:52:06,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:52:06,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:52:06,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:52:06,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:52:06,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:52:06,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:52:06,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:52:06,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:52:06,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:52:06,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:52:06,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:52:06,539 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 09:52:06,588 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:52:06,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:52:06,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:52:06,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:52:06,593 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:52:06,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:52:06,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:52:06,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:52:06,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:52:06,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:52:06,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:52:06,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:52:06,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:52:06,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:52:06,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:52:06,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:52:06,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:52:06,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:52:06,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:52:06,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:52:06,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:52:06,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:52:06,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:52:06,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:52:06,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:52:06,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:52:07,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:52:07,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:52:07,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:52:07,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:52:07,058 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:52:07,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init7_ground-2.i [2021-01-06 09:52:07,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/993f03347/6e14eb337e3344a2bcce4aa0c2221195/FLAGb7452bc61 [2021-01-06 09:52:07,746 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:52:07,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init7_ground-2.i [2021-01-06 09:52:07,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/993f03347/6e14eb337e3344a2bcce4aa0c2221195/FLAGb7452bc61 [2021-01-06 09:52:08,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/993f03347/6e14eb337e3344a2bcce4aa0c2221195 [2021-01-06 09:52:08,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:52:08,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:52:08,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:52:08,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:52:08,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:52:08,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6616b201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08, skipping insertion in model container [2021-01-06 09:52:08,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:52:08,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:52:08,278 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-examples/standard_init7_ground-2.i[816,829] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~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: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~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: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~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: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~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: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~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: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~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: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:52:08,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:52:08,317 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:52:08,331 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-examples/standard_init7_ground-2.i[816,829] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:52:08,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:52:08,360 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:52:08,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08 WrapperNode [2021-01-06 09:52:08,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:52:08,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:52:08,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:52:08,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:52:08,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:52:08,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:52:08,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:52:08,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:52:08,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:52:08,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:52:08,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:52:08,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:52:08,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08" (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 09:52:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:52:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:52:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:52:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:52:08,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:52:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:52:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:52:09,013 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:52:09,013 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-01-06 09:52:09,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:52:09 BoogieIcfgContainer [2021-01-06 09:52:09,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:52:09,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:52:09,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:52:09,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:52:09,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:52:08" (1/3) ... [2021-01-06 09:52:09,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2288ea92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:52:09, skipping insertion in model container [2021-01-06 09:52:09,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08" (2/3) ... [2021-01-06 09:52:09,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2288ea92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:52:09, skipping insertion in model container [2021-01-06 09:52:09,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:52:09" (3/3) ... [2021-01-06 09:52:09,049 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2021-01-06 09:52:09,057 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:52:09,062 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:52:09,084 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:52:09,129 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:52:09,131 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:52:09,131 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:52:09,132 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:52:09,132 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:52:09,132 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:52:09,132 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:52:09,132 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:52:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2021-01-06 09:52:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 09:52:09,166 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:09,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:09,168 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:09,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:09,175 INFO L82 PathProgramCache]: Analyzing trace with hash -495328290, now seen corresponding path program 1 times [2021-01-06 09:52:09,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:09,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32336493] [2021-01-06 09:52:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:09,440 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 09:52:09,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32336493] [2021-01-06 09:52:09,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:52:09,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:52:09,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653269828] [2021-01-06 09:52:09,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:52:09,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:09,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:52:09,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:52:09,475 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2021-01-06 09:52:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:09,570 INFO L93 Difference]: Finished difference Result 56 states and 100 transitions. [2021-01-06 09:52:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:52:09,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 09:52:09,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:09,581 INFO L225 Difference]: With dead ends: 56 [2021-01-06 09:52:09,581 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 09:52:09,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:52:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 09:52:09,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 09:52:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 09:52:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-01-06 09:52:09,639 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2021-01-06 09:52:09,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:09,640 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-01-06 09:52:09,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:52:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-01-06 09:52:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 09:52:09,643 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:09,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:09,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:52:09,645 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:09,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1838625458, now seen corresponding path program 1 times [2021-01-06 09:52:09,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:09,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83996327] [2021-01-06 09:52:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:52:09,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83996327] [2021-01-06 09:52:09,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234778072] [2021-01-06 09:52:09,752 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 09:52:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:09,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:52:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:52:09,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:09,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:52:09,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327186596] [2021-01-06 09:52:09,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:52:09,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:09,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:52:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:52:09,901 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 5 states. [2021-01-06 09:52:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:10,000 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2021-01-06 09:52:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:52:10,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2021-01-06 09:52:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:10,002 INFO L225 Difference]: With dead ends: 61 [2021-01-06 09:52:10,002 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 09:52:10,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 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 09:52:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 09:52:10,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 09:52:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 09:52:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-01-06 09:52:10,011 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 26 [2021-01-06 09:52:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:10,011 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-01-06 09:52:10,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:52:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-01-06 09:52:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:52:10,012 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:10,013 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:10,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:52:10,228 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:10,230 INFO L82 PathProgramCache]: Analyzing trace with hash 469832922, now seen corresponding path program 2 times [2021-01-06 09:52:10,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:10,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776046276] [2021-01-06 09:52:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:52:10,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776046276] [2021-01-06 09:52:10,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344444874] [2021-01-06 09:52:10,322 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 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 09:52:10,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:10,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:10,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:52:10,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:52:10,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:10,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:52:10,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958310282] [2021-01-06 09:52:10,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:52:10,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:10,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:52:10,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:52:10,459 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2021-01-06 09:52:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:10,566 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2021-01-06 09:52:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:52:10,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2021-01-06 09:52:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:10,568 INFO L225 Difference]: With dead ends: 74 [2021-01-06 09:52:10,568 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 09:52:10,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:52:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 09:52:10,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 09:52:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 09:52:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-01-06 09:52:10,589 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 33 [2021-01-06 09:52:10,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:10,590 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-01-06 09:52:10,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:52:10,590 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-01-06 09:52:10,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 09:52:10,591 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:10,592 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:10,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:10,793 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:10,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash -467565902, now seen corresponding path program 3 times [2021-01-06 09:52:10,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:10,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650947011] [2021-01-06 09:52:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:52:10,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650947011] [2021-01-06 09:52:10,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196073218] [2021-01-06 09:52:10,955 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 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 09:52:11,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:52:11,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:11,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:52:11,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:52:11,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:11,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:52:11,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220284125] [2021-01-06 09:52:11,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:52:11,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:52:11,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:52:11,149 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 7 states. [2021-01-06 09:52:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:11,276 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2021-01-06 09:52:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:52:11,277 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2021-01-06 09:52:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:11,278 INFO L225 Difference]: With dead ends: 87 [2021-01-06 09:52:11,278 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 09:52:11,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:52:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 09:52:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 09:52:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 09:52:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-01-06 09:52:11,287 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 40 [2021-01-06 09:52:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:11,287 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-01-06 09:52:11,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:52:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-01-06 09:52:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 09:52:11,289 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:11,289 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:11,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:11,497 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:11,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:11,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1915847130, now seen corresponding path program 4 times [2021-01-06 09:52:11,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:11,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896547069] [2021-01-06 09:52:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-01-06 09:52:11,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896547069] [2021-01-06 09:52:11,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719823875] [2021-01-06 09:52:11,658 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 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 09:52:11,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:52:11,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:11,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:52:11,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-01-06 09:52:11,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:11,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:52:11,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713709659] [2021-01-06 09:52:11,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:52:11,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:11,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:52:11,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:52:11,797 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2021-01-06 09:52:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:11,930 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2021-01-06 09:52:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:52:11,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2021-01-06 09:52:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:11,935 INFO L225 Difference]: With dead ends: 100 [2021-01-06 09:52:11,935 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 09:52:11,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:52:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 09:52:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 09:52:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 09:52:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-01-06 09:52:11,959 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 47 [2021-01-06 09:52:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:11,960 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-01-06 09:52:11,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:52:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-01-06 09:52:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 09:52:11,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:11,964 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:12,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:12,166 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:12,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2119946930, now seen corresponding path program 5 times [2021-01-06 09:52:12,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:12,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793882336] [2021-01-06 09:52:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-01-06 09:52:12,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793882336] [2021-01-06 09:52:12,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953710382] [2021-01-06 09:52:12,264 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 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 09:52:15,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 09:52:15,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:15,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:52:15,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-01-06 09:52:15,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:15,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:52:15,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206348247] [2021-01-06 09:52:15,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:52:15,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:15,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:52:15,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:52:15,496 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 9 states. [2021-01-06 09:52:15,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:15,681 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2021-01-06 09:52:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:52:15,682 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2021-01-06 09:52:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:15,683 INFO L225 Difference]: With dead ends: 113 [2021-01-06 09:52:15,683 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:52:15,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:52:15,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:52:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-01-06 09:52:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:52:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-01-06 09:52:15,700 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 54 [2021-01-06 09:52:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:15,701 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-01-06 09:52:15,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:52:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-01-06 09:52:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:52:15,702 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:15,702 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:15,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:52:15,903 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:15,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1499557594, now seen corresponding path program 6 times [2021-01-06 09:52:15,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:15,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338463181] [2021-01-06 09:52:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 09:52:16,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338463181] [2021-01-06 09:52:16,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440639583] [2021-01-06 09:52:16,024 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 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 09:52:17,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 09:52:17,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:17,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:52:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 09:52:17,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:17,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:52:17,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134950257] [2021-01-06 09:52:17,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:52:17,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:17,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:52:17,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:52:17,132 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 10 states. [2021-01-06 09:52:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:17,272 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2021-01-06 09:52:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:52:17,272 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2021-01-06 09:52:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:17,273 INFO L225 Difference]: With dead ends: 126 [2021-01-06 09:52:17,273 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 09:52:17,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:52:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 09:52:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-01-06 09:52:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 09:52:17,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-01-06 09:52:17,282 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 61 [2021-01-06 09:52:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:17,283 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-01-06 09:52:17,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:52:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-01-06 09:52:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 09:52:17,284 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:17,284 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:17,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:17,499 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:17,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:17,501 INFO L82 PathProgramCache]: Analyzing trace with hash -664919374, now seen corresponding path program 7 times [2021-01-06 09:52:17,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:17,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067074590] [2021-01-06 09:52:17,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-01-06 09:52:17,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067074590] [2021-01-06 09:52:17,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286338092] [2021-01-06 09:52:17,629 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 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 09:52:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:52:17,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-01-06 09:52:17,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:17,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:52:17,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978829064] [2021-01-06 09:52:17,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:52:17,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:17,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:52:17,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:52:17,797 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 11 states. [2021-01-06 09:52:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:17,938 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2021-01-06 09:52:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:52:17,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2021-01-06 09:52:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:17,943 INFO L225 Difference]: With dead ends: 139 [2021-01-06 09:52:17,944 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 09:52:17,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:52:17,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 09:52:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-01-06 09:52:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 09:52:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-01-06 09:52:17,966 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 68 [2021-01-06 09:52:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:17,966 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-01-06 09:52:17,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:52:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-01-06 09:52:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 09:52:17,970 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:17,970 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:18,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:18,184 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:18,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash 184081370, now seen corresponding path program 8 times [2021-01-06 09:52:18,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:18,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791483966] [2021-01-06 09:52:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-01-06 09:52:18,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791483966] [2021-01-06 09:52:18,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841063082] [2021-01-06 09:52:18,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:18,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:18,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:52:18,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-01-06 09:52:18,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:18,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:52:18,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073617357] [2021-01-06 09:52:18,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:52:18,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:18,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:52:18,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:52:18,552 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 12 states. [2021-01-06 09:52:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:18,720 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2021-01-06 09:52:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:52:18,720 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2021-01-06 09:52:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:18,721 INFO L225 Difference]: With dead ends: 152 [2021-01-06 09:52:18,721 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 09:52:18,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:52:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 09:52:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-01-06 09:52:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 09:52:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-01-06 09:52:18,742 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 75 [2021-01-06 09:52:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:18,743 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-01-06 09:52:18,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:52:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-01-06 09:52:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 09:52:18,744 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:18,745 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:18,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:52:18,958 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:18,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:18,959 INFO L82 PathProgramCache]: Analyzing trace with hash -96439630, now seen corresponding path program 9 times [2021-01-06 09:52:18,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:18,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97314458] [2021-01-06 09:52:18,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-01-06 09:52:19,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97314458] [2021-01-06 09:52:19,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412714990] [2021-01-06 09:52:19,095 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 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 09:52:28,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:52:28,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:28,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:52:28,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-01-06 09:52:28,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:28,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:52:28,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866048320] [2021-01-06 09:52:28,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:52:28,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:28,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:52:28,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:52:28,555 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 13 states. [2021-01-06 09:52:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:28,736 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2021-01-06 09:52:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:52:28,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2021-01-06 09:52:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:28,737 INFO L225 Difference]: With dead ends: 165 [2021-01-06 09:52:28,737 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 09:52:28,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:52:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 09:52:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-01-06 09:52:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 09:52:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-01-06 09:52:28,745 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 82 [2021-01-06 09:52:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:28,745 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-01-06 09:52:28,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:52:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-01-06 09:52:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 09:52:28,747 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:28,747 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:28,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:28,948 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1268791078, now seen corresponding path program 10 times [2021-01-06 09:52:28,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:28,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34005933] [2021-01-06 09:52:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 09:52:29,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34005933] [2021-01-06 09:52:29,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167104037] [2021-01-06 09:52:29,133 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 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 09:52:29,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:52:29,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:29,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:52:29,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 09:52:29,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:29,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:52:29,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548365755] [2021-01-06 09:52:29,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:52:29,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:29,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:52:29,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:52:29,369 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 14 states. [2021-01-06 09:52:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:29,546 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2021-01-06 09:52:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:52:29,546 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2021-01-06 09:52:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:29,547 INFO L225 Difference]: With dead ends: 178 [2021-01-06 09:52:29,547 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 09:52:29,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:52:29,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 09:52:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-01-06 09:52:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 09:52:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-01-06 09:52:29,565 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 89 [2021-01-06 09:52:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:29,565 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-01-06 09:52:29,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:52:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-01-06 09:52:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 09:52:29,570 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:29,571 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:29,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:29,785 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:29,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash -669334862, now seen corresponding path program 11 times [2021-01-06 09:52:29,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:29,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305943907] [2021-01-06 09:52:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-01-06 09:52:29,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305943907] [2021-01-06 09:52:29,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930959138] [2021-01-06 09:52:29,977 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 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