/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:52:06,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:52:06,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:52:06,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:52:06,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:52:06,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:52:06,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:52:06,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:52:06,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:52:06,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:52:06,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:52:06,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:52:06,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:52:06,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:52:06,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:52:06,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:52:06,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:52:06,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:52:06,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:52:06,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:52:06,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:52:06,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:52:06,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:52:06,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:52:06,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 09:52:06,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 09:52:06,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 09:52:06,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 09:52:06,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 09:52:06,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 09:52:06,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:52:06,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:52:06,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:52:06,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:52:06,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:52:06,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:52:06,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:52:06,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:52:06,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:52:06,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:52:06,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:52:06,488 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 09:52:06,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:52:06,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:52:06,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:52:06,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:52:06,520 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:52:06,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:52:06,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:52:06,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:52:06,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:52:06,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:52:06,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:52:06,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:52:06,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:52:06,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:52:06,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:52:06,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:52:06,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:52:06,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:52:06,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:52:06,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:52:06,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:52:06,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:52:06,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:52:06,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:52:06,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:52:06,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:52:06,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:52:07,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:52:07,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:52:07,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:52:07,047 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:52:07,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init7_ground-1.i [2021-01-06 09:52:07,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/41f5d3390/a0c9a64f32d643029431343fddd82662/FLAG9967a4f19 [2021-01-06 09:52:07,788 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:52:07,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init7_ground-1.i [2021-01-06 09:52:07,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/41f5d3390/a0c9a64f32d643029431343fddd82662/FLAG9967a4f19 [2021-01-06 09:52:08,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/41f5d3390/a0c9a64f32d643029431343fddd82662 [2021-01-06 09:52:08,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:52:08,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:52:08,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:52:08,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:52:08,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:52:08,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12016146 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 09:52:08,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:52:08" (1/1) ... [2021-01-06 09:52:08,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:52:08,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:52:08,453 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-1.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 09:52:08,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:52:08,493 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:52:08,510 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-1.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 09:52:08,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:52:08,540 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:52:08,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:08 WrapperNode [2021-01-06 09:52:08,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:52:08,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:52:08,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:52:08,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:52:08,551 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 09:52:08,560 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 09:52:08,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:52:08,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:52:08,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:52:08,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:52:08,597 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 09:52:08,597 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 09:52:08,600 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 09:52:08,600 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 09:52:08,607 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 09:52:08,613 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 09:52:08,615 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 09:52:08,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:52:08,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:52:08,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:52:08,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:52:08,621 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 09:52:08,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:52:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:52:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:52:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:52:08,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:52:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:52:08,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:52:09,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:52:09,211 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-01-06 09:52:09,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:52:09 BoogieIcfgContainer [2021-01-06 09:52:09,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:52:09,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:52:09,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:52:09,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:52:09,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:52:08" (1/3) ... [2021-01-06 09:52:09,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0ff3df 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 09:52:09,221 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 09:52:09,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0ff3df 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 09:52:09,222 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 09:52:09,223 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-1.i [2021-01-06 09:52:09,230 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:52:09,236 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:52:09,291 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:52:09,353 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:52:09,353 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:52:09,354 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:52:09,354 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:52:09,354 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:52:09,354 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:52:09,354 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:52:09,355 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:52:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2021-01-06 09:52:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 09:52:09,377 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:09,378 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 09:52:09,379 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:09,386 INFO L82 PathProgramCache]: Analyzing trace with hash -495328290, now seen corresponding path program 1 times [2021-01-06 09:52:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:09,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482136100] [2021-01-06 09:52:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:09,586 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 09:52:09,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482136100] [2021-01-06 09:52:09,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:52:09,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:52:09,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961215378] [2021-01-06 09:52:09,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:52:09,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:09,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:52:09,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:52:09,614 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2021-01-06 09:52:09,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:09,737 INFO L93 Difference]: Finished difference Result 56 states and 100 transitions. [2021-01-06 09:52:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:52:09,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 09:52:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:09,750 INFO L225 Difference]: With dead ends: 56 [2021-01-06 09:52:09,750 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 09:52:09,754 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 09:52:09,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 09:52:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 09:52:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 09:52:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-01-06 09:52:09,795 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2021-01-06 09:52:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:09,795 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-01-06 09:52:09,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:52:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-01-06 09:52:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 09:52:09,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:09,797 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 09:52:09,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:52:09,797 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:09,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1838625458, now seen corresponding path program 1 times [2021-01-06 09:52:09,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:09,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462232573] [2021-01-06 09:52:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:09,867 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 09:52:09,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462232573] [2021-01-06 09:52:09,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409086165] [2021-01-06 09:52:09,868 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 09:52:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:09,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:52:09,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:10,021 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 09:52:10,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:10,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:52:10,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374461669] [2021-01-06 09:52:10,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:52:10,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:10,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:52:10,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:52:10,026 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 5 states. [2021-01-06 09:52:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:10,113 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2021-01-06 09:52:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:52:10,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2021-01-06 09:52:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:10,115 INFO L225 Difference]: With dead ends: 61 [2021-01-06 09:52:10,115 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 09:52:10,117 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 09:52:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 09:52:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 09:52:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 09:52:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-01-06 09:52:10,125 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 26 [2021-01-06 09:52:10,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:10,126 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-01-06 09:52:10,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:52:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-01-06 09:52:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:52:10,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:10,127 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 09:52:10,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:52:10,342 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:10,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:10,344 INFO L82 PathProgramCache]: Analyzing trace with hash 469832922, now seen corresponding path program 2 times [2021-01-06 09:52:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:10,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314178067] [2021-01-06 09:52:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:10,498 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 09:52:10,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314178067] [2021-01-06 09:52:10,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110100360] [2021-01-06 09:52:10,501 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 09:52:10,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:10,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:10,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:52:10,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:10,618 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 09:52:10,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:10,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:52:10,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660977979] [2021-01-06 09:52:10,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:52:10,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:10,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:52:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:52:10,622 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2021-01-06 09:52:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:10,760 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2021-01-06 09:52:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:52:10,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2021-01-06 09:52:10,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:10,765 INFO L225 Difference]: With dead ends: 74 [2021-01-06 09:52:10,766 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 09:52:10,767 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 09:52:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 09:52:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 09:52:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 09:52:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-01-06 09:52:10,792 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 33 [2021-01-06 09:52:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:10,793 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-01-06 09:52:10,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:52:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-01-06 09:52:10,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 09:52:10,794 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:10,795 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 09:52:10,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:10,999 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash -467565902, now seen corresponding path program 3 times [2021-01-06 09:52:11,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:11,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756205661] [2021-01-06 09:52:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:11,171 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 09:52:11,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756205661] [2021-01-06 09:52:11,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450240438] [2021-01-06 09:52:11,173 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 09:52:11,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:52:11,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:11,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:52:11,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:11,421 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 09:52:11,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:11,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:52:11,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145289392] [2021-01-06 09:52:11,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:52:11,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:11,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:52:11,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:52:11,425 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 7 states. [2021-01-06 09:52:11,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:11,518 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2021-01-06 09:52:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:52:11,519 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2021-01-06 09:52:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:11,520 INFO L225 Difference]: With dead ends: 87 [2021-01-06 09:52:11,520 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 09:52:11,521 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 09:52:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 09:52:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 09:52:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 09:52:11,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-01-06 09:52:11,529 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 40 [2021-01-06 09:52:11,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:11,530 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-01-06 09:52:11,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:52:11,530 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-01-06 09:52:11,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 09:52:11,532 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:11,532 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 09:52:11,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:11,747 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:11,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:11,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1915847130, now seen corresponding path program 4 times [2021-01-06 09:52:11,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:11,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868924413] [2021-01-06 09:52:11,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:11,914 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 09:52:11,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868924413] [2021-01-06 09:52:11,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756771785] [2021-01-06 09:52:11,916 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 09:52:11,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:52:11,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:11,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:52:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:12,035 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 09:52:12,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:12,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:52:12,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849661095] [2021-01-06 09:52:12,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:52:12,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:12,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:52:12,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:52:12,038 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2021-01-06 09:52:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:12,187 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2021-01-06 09:52:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:52:12,188 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2021-01-06 09:52:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:12,192 INFO L225 Difference]: With dead ends: 100 [2021-01-06 09:52:12,193 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 09:52:12,194 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 09:52:12,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 09:52:12,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 09:52:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 09:52:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-01-06 09:52:12,212 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 47 [2021-01-06 09:52:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:12,213 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-01-06 09:52:12,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:52:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-01-06 09:52:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 09:52:12,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:12,215 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 09:52:12,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:12,429 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:12,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2119946930, now seen corresponding path program 5 times [2021-01-06 09:52:12,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:12,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327555226] [2021-01-06 09:52:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:12,549 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 09:52:12,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327555226] [2021-01-06 09:52:12,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741238859] [2021-01-06 09:52:12,551 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 09:52:16,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 09:52:16,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:16,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:52:16,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:16,162 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 09:52:16,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:16,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:52:16,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128312267] [2021-01-06 09:52:16,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:52:16,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:52:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:52:16,165 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 9 states. [2021-01-06 09:52:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:16,320 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2021-01-06 09:52:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:52:16,321 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2021-01-06 09:52:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:16,322 INFO L225 Difference]: With dead ends: 113 [2021-01-06 09:52:16,322 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:52:16,323 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 09:52:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:52:16,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-01-06 09:52:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:52:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-01-06 09:52:16,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 54 [2021-01-06 09:52:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:16,333 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-01-06 09:52:16,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:52:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-01-06 09:52:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:52:16,334 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:16,334 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 09:52:16,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:52:16,548 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:16,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1499557594, now seen corresponding path program 6 times [2021-01-06 09:52:16,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:16,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458205225] [2021-01-06 09:52:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:16,655 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 09:52:16,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458205225] [2021-01-06 09:52:16,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601674754] [2021-01-06 09:52:16,656 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 09:52:18,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 09:52:18,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:18,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:52:18,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:18,214 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 09:52:18,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:18,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:52:18,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443403808] [2021-01-06 09:52:18,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:52:18,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:18,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:52:18,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:52:18,221 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 10 states. [2021-01-06 09:52:18,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:18,384 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2021-01-06 09:52:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:52:18,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2021-01-06 09:52:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:18,388 INFO L225 Difference]: With dead ends: 126 [2021-01-06 09:52:18,389 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 09:52:18,390 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 09:52:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 09:52:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-01-06 09:52:18,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 09:52:18,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-01-06 09:52:18,417 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 61 [2021-01-06 09:52:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:18,417 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-01-06 09:52:18,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:52:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-01-06 09:52:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 09:52:18,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:18,419 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 09:52:18,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:18,620 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:18,621 INFO L82 PathProgramCache]: Analyzing trace with hash -664919374, now seen corresponding path program 7 times [2021-01-06 09:52:18,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:18,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033888859] [2021-01-06 09:52:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:18,754 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 09:52:18,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033888859] [2021-01-06 09:52:18,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622497860] [2021-01-06 09:52:18,755 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 09:52:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:18,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:52:18,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:18,934 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 09:52:18,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:18,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:52:18,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484994036] [2021-01-06 09:52:18,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:52:18,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:18,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:52:18,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:52:18,937 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 11 states. [2021-01-06 09:52:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:19,097 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2021-01-06 09:52:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:52:19,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2021-01-06 09:52:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:19,098 INFO L225 Difference]: With dead ends: 139 [2021-01-06 09:52:19,098 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 09:52:19,099 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 09:52:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 09:52:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-01-06 09:52:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 09:52:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-01-06 09:52:19,108 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 68 [2021-01-06 09:52:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:19,109 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-01-06 09:52:19,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:52:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-01-06 09:52:19,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 09:52:19,110 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:19,110 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 09:52:19,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:19,325 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:19,326 INFO L82 PathProgramCache]: Analyzing trace with hash 184081370, now seen corresponding path program 8 times [2021-01-06 09:52:19,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:19,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136693530] [2021-01-06 09:52:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:19,479 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 09:52:19,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136693530] [2021-01-06 09:52:19,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152392717] [2021-01-06 09:52:19,480 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 09:52:19,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:19,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:19,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:52:19,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:19,716 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 09:52:19,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:19,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:52:19,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137055156] [2021-01-06 09:52:19,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:52:19,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:19,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:52:19,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:52:19,719 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 12 states. [2021-01-06 09:52:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:19,896 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2021-01-06 09:52:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:52:19,896 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2021-01-06 09:52:19,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:19,898 INFO L225 Difference]: With dead ends: 152 [2021-01-06 09:52:19,898 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 09:52:19,901 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 09:52:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 09:52:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-01-06 09:52:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 09:52:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-01-06 09:52:19,928 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 75 [2021-01-06 09:52:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:19,933 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-01-06 09:52:19,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:52:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-01-06 09:52:19,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 09:52:19,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:19,935 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 09:52:20,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:52:20,153 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:20,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:20,154 INFO L82 PathProgramCache]: Analyzing trace with hash -96439630, now seen corresponding path program 9 times [2021-01-06 09:52:20,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:20,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324662622] [2021-01-06 09:52:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:20,341 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 09:52:20,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324662622] [2021-01-06 09:52:20,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842900483] [2021-01-06 09:52:20,342 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 09:52:31,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:52:31,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:31,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:52:31,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:31,907 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 09:52:31,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:31,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:52:31,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985094132] [2021-01-06 09:52:31,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:52:31,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:52:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:52:31,910 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 13 states. [2021-01-06 09:52:32,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:32,135 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2021-01-06 09:52:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:52:32,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2021-01-06 09:52:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:32,136 INFO L225 Difference]: With dead ends: 165 [2021-01-06 09:52:32,136 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 09:52:32,137 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 09:52:32,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 09:52:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-01-06 09:52:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 09:52:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-01-06 09:52:32,145 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 82 [2021-01-06 09:52:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:32,145 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-01-06 09:52:32,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:52:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-01-06 09:52:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 09:52:32,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:32,146 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 09:52:32,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:32,348 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1268791078, now seen corresponding path program 10 times [2021-01-06 09:52:32,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:32,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905421015] [2021-01-06 09:52:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:32,532 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 09:52:32,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905421015] [2021-01-06 09:52:32,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701956053] [2021-01-06 09:52:32,533 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 09:52:32,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:52:32,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:32,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:52:32,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:32,794 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 09:52:32,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:32,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:52:32,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580114434] [2021-01-06 09:52:32,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:52:32,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:32,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:52:32,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:52:32,797 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 14 states. [2021-01-06 09:52:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:33,018 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2021-01-06 09:52:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:52:33,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2021-01-06 09:52:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:33,019 INFO L225 Difference]: With dead ends: 178 [2021-01-06 09:52:33,019 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 09:52:33,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:52:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 09:52:33,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-01-06 09:52:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 09:52:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-01-06 09:52:33,035 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 89 [2021-01-06 09:52:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:33,036 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-01-06 09:52:33,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:52:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-01-06 09:52:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 09:52:33,040 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:33,041 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 09:52:33,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:33,257 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:33,260 INFO L82 PathProgramCache]: Analyzing trace with hash -669334862, now seen corresponding path program 11 times [2021-01-06 09:52:33,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:33,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294263456] [2021-01-06 09:52:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:33,442 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 09:52:33,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294263456] [2021-01-06 09:52:33,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114312847] [2021-01-06 09:52:33,445 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