/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_copy8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:46:51,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:46:51,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:46:51,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:46:51,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:46:51,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:46:51,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:46:51,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:46:51,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:46:51,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:46:51,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:46:51,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:46:51,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:46:51,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:46:51,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:46:51,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:46:51,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:46:51,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:46:51,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:46:51,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:46:51,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:46:51,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:46:51,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:46:51,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:46:51,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:46:51,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:46:51,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:46:51,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:46:51,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:46:51,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:46:51,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:46:51,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:46:51,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:46:51,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:46:51,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:46:51,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:46:51,573 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 09:46:51,603 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:46:51,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:46:51,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:46:51,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:46:51,606 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:46:51,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:46:51,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:46:51,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:46:51,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:46:51,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:46:51,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:46:51,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:46:51,608 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:46:51,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:46:51,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:46:51,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:46:51,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:46:51,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:46:51,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:46:51,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:46:51,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:46:51,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:46:51,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:46:51,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:46:51,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:46:51,611 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:46:52,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:46:52,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:46:52,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:46:52,061 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:46:52,062 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:46:52,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy8_ground-1.i [2021-01-06 09:46:52,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6f72d2477/43a0437d865146c79d298076135aac51/FLAG0f94c26c2 [2021-01-06 09:46:52,814 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:46:52,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy8_ground-1.i [2021-01-06 09:46:52,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6f72d2477/43a0437d865146c79d298076135aac51/FLAG0f94c26c2 [2021-01-06 09:46:53,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6f72d2477/43a0437d865146c79d298076135aac51 [2021-01-06 09:46:53,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:46:53,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:46:53,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:46:53,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:46:53,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:46:53,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:46:53" (1/1) ... [2021-01-06 09:46:53,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a285296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53, skipping insertion in model container [2021-01-06 09:46:53,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:46:53" (1/1) ... [2021-01-06 09:46:53,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:46:53,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:46:53,406 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_copy8_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a4~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a5~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a6~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a7~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a8~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a9~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:46:53,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:46:53,483 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:46:53,506 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_copy8_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a4~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a4~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a5~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a5~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a6~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a6~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a7~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a7~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a8~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a8~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a9~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a9~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:46:53,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:46:53,590 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:46:53,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53 WrapperNode [2021-01-06 09:46:53,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:46:53,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:46:53,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:46:53,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:46:53,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53" (1/1) ... [2021-01-06 09:46:53,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53" (1/1) ... [2021-01-06 09:46:53,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:46:53,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:46:53,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:46:53,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:46:53,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53" (1/1) ... [2021-01-06 09:46:53,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53" (1/1) ... [2021-01-06 09:46:53,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53" (1/1) ... [2021-01-06 09:46:53,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53" (1/1) ... [2021-01-06 09:46:53,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53" (1/1) ... [2021-01-06 09:46:53,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53" (1/1) ... [2021-01-06 09:46:53,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53" (1/1) ... [2021-01-06 09:46:53,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:46:53,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:46:53,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:46:53,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:46:53,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53" (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 09:46:53,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:46:53,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:46:53,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:46:53,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:46:53,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:46:53,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:46:53,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:46:54,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:46:54,476 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-01-06 09:46:54,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:46:54 BoogieIcfgContainer [2021-01-06 09:46:54,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:46:54,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:46:54,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:46:54,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:46:54,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:46:53" (1/3) ... [2021-01-06 09:46:54,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688b53bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:46:54, skipping insertion in model container [2021-01-06 09:46:54,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:46:53" (2/3) ... [2021-01-06 09:46:54,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688b53bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:46:54, skipping insertion in model container [2021-01-06 09:46:54,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:46:54" (3/3) ... [2021-01-06 09:46:54,492 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.i [2021-01-06 09:46:54,503 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:46:54,508 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:46:54,536 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:46:54,584 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:46:54,585 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:46:54,585 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:46:54,585 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:46:54,585 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:46:54,585 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:46:54,586 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:46:54,586 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:46:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2021-01-06 09:46:54,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 09:46:54,622 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:46:54,623 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] [2021-01-06 09:46:54,624 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:46:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:46:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1852783825, now seen corresponding path program 1 times [2021-01-06 09:46:54,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:46:54,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28371979] [2021-01-06 09:46:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:46:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:46:54,984 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 09:46:54,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28371979] [2021-01-06 09:46:54,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:46:54,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:46:54,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687370963] [2021-01-06 09:46:54,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:46:54,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:46:55,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:46:55,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:46:55,018 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2021-01-06 09:46:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:46:55,104 INFO L93 Difference]: Finished difference Result 76 states and 116 transitions. [2021-01-06 09:46:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:46:55,112 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-01-06 09:46:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:46:55,134 INFO L225 Difference]: With dead ends: 76 [2021-01-06 09:46:55,135 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 09:46:55,139 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 09:46:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 09:46:55,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-01-06 09:46:55,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 09:46:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-01-06 09:46:55,187 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 23 [2021-01-06 09:46:55,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:46:55,188 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-01-06 09:46:55,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:46:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-01-06 09:46:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 09:46:55,189 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:46:55,190 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] [2021-01-06 09:46:55,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:46:55,190 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:46:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:46:55,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1595357053, now seen corresponding path program 1 times [2021-01-06 09:46:55,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:46:55,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327377517] [2021-01-06 09:46:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:46:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:46:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:46:55,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327377517] [2021-01-06 09:46:55,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6258429] [2021-01-06 09:46:55,275 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 09:46:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:46:55,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:46:55,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:46:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:46:55,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:46:55,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:46:55,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175926990] [2021-01-06 09:46:55,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:46:55,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:46:55,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:46:55,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:46:55,555 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2021-01-06 09:46:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:46:55,668 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2021-01-06 09:46:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:46:55,669 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-01-06 09:46:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:46:55,670 INFO L225 Difference]: With dead ends: 80 [2021-01-06 09:46:55,671 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 09:46:55,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:46:55,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 09:46:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2021-01-06 09:46:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:46:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-01-06 09:46:55,681 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2021-01-06 09:46:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:46:55,681 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-01-06 09:46:55,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:46:55,681 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-01-06 09:46:55,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:46:55,683 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:46:55,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:46:55,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:46:55,897 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:46:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:46:55,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1558845843, now seen corresponding path program 1 times [2021-01-06 09:46:55,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:46:55,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269861406] [2021-01-06 09:46:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:46:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:46:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 09:46:56,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269861406] [2021-01-06 09:46:56,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396983126] [2021-01-06 09:46:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:46:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:46:56,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:46:56,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:46:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 09:46:56,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:46:56,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:46:56,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601627957] [2021-01-06 09:46:56,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:46:56,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:46:56,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:46:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:46:56,254 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2021-01-06 09:46:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:46:56,302 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-01-06 09:46:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:46:56,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2021-01-06 09:46:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:46:56,304 INFO L225 Difference]: With dead ends: 86 [2021-01-06 09:46:56,304 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 09:46:56,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 09:46:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 09:46:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-01-06 09:46:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 09:46:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-01-06 09:46:56,313 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 41 [2021-01-06 09:46:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:46:56,313 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-01-06 09:46:56,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:46:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-01-06 09:46:56,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 09:46:56,315 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:46:56,315 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:46:56,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:46:56,529 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:46:56,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:46:56,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1389665195, now seen corresponding path program 2 times [2021-01-06 09:46:56,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:46:56,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292562773] [2021-01-06 09:46:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:46:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:46:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 09:46:56,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292562773] [2021-01-06 09:46:56,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821262020] [2021-01-06 09:46:56,650 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 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 09:46:56,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:46:56,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:46:56,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:46:56,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:46:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 09:46:56,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:46:56,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:46:56,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989743651] [2021-01-06 09:46:56,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:46:56,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:46:56,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:46:56,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:46:56,809 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 5 states. [2021-01-06 09:46:56,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:46:56,964 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2021-01-06 09:46:56,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:46:56,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2021-01-06 09:46:56,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:46:56,966 INFO L225 Difference]: With dead ends: 105 [2021-01-06 09:46:56,966 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 09:46:56,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 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 09:46:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 09:46:56,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2021-01-06 09:46:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 09:46:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-01-06 09:46:56,976 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 43 [2021-01-06 09:46:56,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:46:56,977 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-01-06 09:46:56,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:46:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-01-06 09:46:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 09:46:56,978 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:46:56,979 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:46:57,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:46:57,195 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:46:57,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:46:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash 897576603, now seen corresponding path program 3 times [2021-01-06 09:46:57,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:46:57,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059357072] [2021-01-06 09:46:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:46:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:46:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 09:46:57,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059357072] [2021-01-06 09:46:57,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575805811] [2021-01-06 09:46:57,299 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 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 09:46:57,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:46:57,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:46:57,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:46:57,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:46:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 09:46:57,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:46:57,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 09:46:57,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146081631] [2021-01-06 09:46:57,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:46:57,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:46:57,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:46:57,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:46:57,505 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2021-01-06 09:46:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:46:57,693 INFO L93 Difference]: Finished difference Result 144 states and 170 transitions. [2021-01-06 09:46:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:46:57,694 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2021-01-06 09:46:57,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:46:57,695 INFO L225 Difference]: With dead ends: 144 [2021-01-06 09:46:57,695 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 09:46:57,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:46:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 09:46:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-01-06 09:46:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 09:46:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-01-06 09:46:57,707 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 59 [2021-01-06 09:46:57,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:46:57,707 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-01-06 09:46:57,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:46:57,707 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-01-06 09:46:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 09:46:57,708 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:46:57,709 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-01-06 09:46:57,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:46:57,923 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:46:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:46:57,925 INFO L82 PathProgramCache]: Analyzing trace with hash -511310007, now seen corresponding path program 4 times [2021-01-06 09:46:57,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:46:57,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088016069] [2021-01-06 09:46:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:46:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:46:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:46:58,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088016069] [2021-01-06 09:46:58,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377175943] [2021-01-06 09:46:58,027 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 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 09:46:58,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:46:58,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:46:58,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:46:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:46:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:46:58,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:46:58,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:46:58,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253029046] [2021-01-06 09:46:58,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:46:58,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:46:58,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:46:58,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:46:58,187 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 7 states. [2021-01-06 09:46:58,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:46:58,212 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2021-01-06 09:46:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:46:58,213 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2021-01-06 09:46:58,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:46:58,214 INFO L225 Difference]: With dead ends: 154 [2021-01-06 09:46:58,214 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 09:46:58,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 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 09:46:58,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 09:46:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-01-06 09:46:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 09:46:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-01-06 09:46:58,240 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 77 [2021-01-06 09:46:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:46:58,244 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-01-06 09:46:58,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:46:58,244 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-01-06 09:46:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 09:46:58,247 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:46:58,248 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-01-06 09:46:58,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:46:58,449 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:46:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:46:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1970500999, now seen corresponding path program 5 times [2021-01-06 09:46:58,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:46:58,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433148096] [2021-01-06 09:46:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:46:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:46:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:46:58,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433148096] [2021-01-06 09:46:58,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992410986] [2021-01-06 09:46:58,651 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 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 09:47:33,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 09:47:33,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:33,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:47:33,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-01-06 09:47:33,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:33,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 09:47:33,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577739813] [2021-01-06 09:47:33,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:47:33,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:33,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:47:33,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:33,486 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 11 states. [2021-01-06 09:47:33,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:33,706 INFO L93 Difference]: Finished difference Result 180 states and 206 transitions. [2021-01-06 09:47:33,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:47:33,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2021-01-06 09:47:33,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:33,707 INFO L225 Difference]: With dead ends: 180 [2021-01-06 09:47:33,707 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 09:47:33,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 09:47:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-01-06 09:47:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 09:47:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2021-01-06 09:47:33,718 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 79 [2021-01-06 09:47:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:33,718 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2021-01-06 09:47:33,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:47:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2021-01-06 09:47:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 09:47:33,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:33,720 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-01-06 09:47:33,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:33,935 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1406577461, now seen corresponding path program 6 times [2021-01-06 09:47:33,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:33,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741818091] [2021-01-06 09:47:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 09:47:34,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741818091] [2021-01-06 09:47:34,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435866858] [2021-01-06 09:47:34,091 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 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 09:47:35,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 09:47:35,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:35,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:47:35,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-01-06 09:47:35,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:35,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-01-06 09:47:35,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160757107] [2021-01-06 09:47:35,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:47:35,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:47:35,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:35,651 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand 13 states. [2021-01-06 09:47:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:35,887 INFO L93 Difference]: Finished difference Result 214 states and 240 transitions. [2021-01-06 09:47:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:47:35,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2021-01-06 09:47:35,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:35,889 INFO L225 Difference]: With dead ends: 214 [2021-01-06 09:47:35,889 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 09:47:35,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 09:47:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2021-01-06 09:47:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 09:47:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2021-01-06 09:47:35,900 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 97 [2021-01-06 09:47:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:35,900 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2021-01-06 09:47:35,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:47:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2021-01-06 09:47:35,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 09:47:35,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:35,904 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1] [2021-01-06 09:47:36,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:36,120 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash -321547933, now seen corresponding path program 7 times [2021-01-06 09:47:36,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:36,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800861149] [2021-01-06 09:47:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 09:47:36,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800861149] [2021-01-06 09:47:36,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627997233] [2021-01-06 09:47:36,252 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 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 09:47:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:36,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:47:36,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 09:47:36,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:36,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:47:36,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132900399] [2021-01-06 09:47:36,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:47:36,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:47:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:47:36,439 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand 10 states. [2021-01-06 09:47:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:36,472 INFO L93 Difference]: Finished difference Result 224 states and 242 transitions. [2021-01-06 09:47:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:47:36,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 115 [2021-01-06 09:47:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:36,473 INFO L225 Difference]: With dead ends: 224 [2021-01-06 09:47:36,473 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 09:47:36,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 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 09:47:36,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 09:47:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-01-06 09:47:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 09:47:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2021-01-06 09:47:36,483 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 115 [2021-01-06 09:47:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:36,483 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2021-01-06 09:47:36,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:47:36,483 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2021-01-06 09:47:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 09:47:36,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:36,485 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1] [2021-01-06 09:47:36,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:47:36,700 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:36,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:36,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1065115937, now seen corresponding path program 8 times [2021-01-06 09:47:36,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:36,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688440860] [2021-01-06 09:47:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 09:47:36,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688440860] [2021-01-06 09:47:36,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464655628] [2021-01-06 09:47:36,865 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 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 09:47:36,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:36,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:36,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:47:36,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 09:47:37,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:37,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:47:37,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330059798] [2021-01-06 09:47:37,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:47:37,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:37,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:47:37,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:37,119 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 11 states. [2021-01-06 09:47:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:37,158 INFO L93 Difference]: Finished difference Result 226 states and 244 transitions. [2021-01-06 09:47:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:47:37,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 117 [2021-01-06 09:47:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:37,160 INFO L225 Difference]: With dead ends: 226 [2021-01-06 09:47:37,161 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 09:47:37,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 117 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 09:47:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 09:47:37,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-01-06 09:47:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 09:47:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2021-01-06 09:47:37,176 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 117 [2021-01-06 09:47:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:37,176 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2021-01-06 09:47:37,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:47:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2021-01-06 09:47:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 09:47:37,183 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:37,184 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1] [2021-01-06 09:47:37,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:37,397 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:37,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2085734049, now seen corresponding path program 9 times [2021-01-06 09:47:37,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:37,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983249730] [2021-01-06 09:47:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 09:47:37,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983249730] [2021-01-06 09:47:37,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796707633] [2021-01-06 09:47:37,574 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 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 09:47:40,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:47:40,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:47:40,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-01-06 09:47:40,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:40,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-01-06 09:47:40,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314149427] [2021-01-06 09:47:40,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:47:40,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:40,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:47:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:47:40,844 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand 17 states. [2021-01-06 09:47:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:41,176 INFO L93 Difference]: Finished difference Result 252 states and 278 transitions. [2021-01-06 09:47:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:47:41,177 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 119 [2021-01-06 09:47:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:41,178 INFO L225 Difference]: With dead ends: 252 [2021-01-06 09:47:41,178 INFO L226 Difference]: Without dead ends: 149 [2021-01-06 09:47:41,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:47:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-01-06 09:47:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 140. [2021-01-06 09:47:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2021-01-06 09:47:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2021-01-06 09:47:41,186 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 119 [2021-01-06 09:47:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:41,186 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2021-01-06 09:47:41,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:47:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2021-01-06 09:47:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-01-06 09:47:41,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:41,188 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:41,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:41,404 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:41,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2099631859, now seen corresponding path program 10 times [2021-01-06 09:47:41,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:41,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826361540] [2021-01-06 09:47:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:47:41,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826361540] [2021-01-06 09:47:41,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534669356] [2021-01-06 09:47:41,550 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:41,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:41,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:41,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:47:41,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-01-06 09:47:41,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:41,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-01-06 09:47:41,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498655188] [2021-01-06 09:47:41,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:47:41,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:41,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:47:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:47:41,914 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand 19 states. [2021-01-06 09:47:42,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:42,356 INFO L93 Difference]: Finished difference Result 286 states and 312 transitions. [2021-01-06 09:47:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:47:42,356 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 137 [2021-01-06 09:47:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:42,358 INFO L225 Difference]: With dead ends: 286 [2021-01-06 09:47:42,358 INFO L226 Difference]: Without dead ends: 167 [2021-01-06 09:47:42,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:47:42,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-01-06 09:47:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2021-01-06 09:47:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 09:47:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 167 transitions. [2021-01-06 09:47:42,368 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 167 transitions. Word has length 137 [2021-01-06 09:47:42,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:42,368 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 167 transitions. [2021-01-06 09:47:42,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:47:42,369 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 167 transitions. [2021-01-06 09:47:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-01-06 09:47:42,370 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:42,371 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1] [2021-01-06 09:47:42,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:47:42,585 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:42,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1165539013, now seen corresponding path program 11 times [2021-01-06 09:47:42,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:42,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526071975] [2021-01-06 09:47:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 09:47:42,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526071975] [2021-01-06 09:47:42,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885146385] [2021-01-06 09:47:42,820 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true