/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_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:52:03,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:52:03,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:52:03,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:52:03,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:52:03,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:52:03,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:52:03,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:52:03,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:52:03,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:52:03,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:52:03,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:52:03,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:52:03,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:52:03,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:52:03,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:52:03,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:52:03,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:52:03,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:52:03,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:52:03,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:52:03,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:52:03,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:52:03,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:52:03,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:52:03,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:52:03,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:52:03,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:52:03,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:52:03,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:52:03,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:52:03,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:52:03,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:52:03,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:52:03,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:52:03,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:52:03,847 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:52:03,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:52:03,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:52:03,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:52:03,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:52:03,900 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:52:03,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:52:03,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:52:03,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:52:03,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:52:03,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:52:03,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:52:03,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:52:03,902 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:52:03,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:52:03,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:52:03,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:52:03,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:52:03,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:52:03,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:52:03,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:52:03,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:52:03,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:52:03,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:52:03,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:52:03,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:52:03,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:52:04,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:52:04,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:52:04,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:52:04,329 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:52:04,330 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:52:04,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2021-01-06 09:52:04,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8e1f2c8e1/c11e1bd6f2d64b49a5f02e7cd1e4bd1b/FLAG0224b9864 [2021-01-06 09:52:05,104 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:52:05,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2021-01-06 09:52:05,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8e1f2c8e1/c11e1bd6f2d64b49a5f02e7cd1e4bd1b/FLAG0224b9864 [2021-01-06 09:52:05,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8e1f2c8e1/c11e1bd6f2d64b49a5f02e7cd1e4bd1b [2021-01-06 09:52:05,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:52:05,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:52:05,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:52:05,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:52:05,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:52:05,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:52:05" (1/1) ... [2021-01-06 09:52:05,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1855f2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05, skipping insertion in model container [2021-01-06 09:52:05,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:52:05" (1/1) ... [2021-01-06 09:52:05,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:52:05,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:52:05,660 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_init6_ground-2.i[816,829] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:52:05,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:52:05,698 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:52:05,713 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_init6_ground-2.i[816,829] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:52:05,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:52:05,743 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:52:05,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05 WrapperNode [2021-01-06 09:52:05,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:52:05,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:52:05,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:52:05,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:52:05,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05" (1/1) ... [2021-01-06 09:52:05,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05" (1/1) ... [2021-01-06 09:52:05,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:52:05,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:52:05,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:52:05,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:52:05,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05" (1/1) ... [2021-01-06 09:52:05,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05" (1/1) ... [2021-01-06 09:52:05,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05" (1/1) ... [2021-01-06 09:52:05,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05" (1/1) ... [2021-01-06 09:52:05,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05" (1/1) ... [2021-01-06 09:52:05,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05" (1/1) ... [2021-01-06 09:52:05,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05" (1/1) ... [2021-01-06 09:52:05,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:52:05,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:52:05,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:52:05,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:52:05,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:52:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:52:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:52:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:52:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:52:05,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:52:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:52:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:52:06,332 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:52:06,333 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 09:52:06,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:52:06 BoogieIcfgContainer [2021-01-06 09:52:06,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:52:06,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:52:06,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:52:06,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:52:06,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:52:05" (1/3) ... [2021-01-06 09:52:06,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9e2ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:52:06, skipping insertion in model container [2021-01-06 09:52:06,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:05" (2/3) ... [2021-01-06 09:52:06,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9e2ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:52:06, skipping insertion in model container [2021-01-06 09:52:06,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:52:06" (3/3) ... [2021-01-06 09:52:06,350 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2021-01-06 09:52:06,358 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:52:06,365 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:52:06,384 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:52:06,429 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:52:06,429 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:52:06,430 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:52:06,430 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:52:06,430 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:52:06,430 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:52:06,430 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:52:06,430 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:52:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-01-06 09:52:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 09:52:06,455 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:06,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:06,457 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:06,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:06,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1501159767, now seen corresponding path program 1 times [2021-01-06 09:52:06,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:06,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923024525] [2021-01-06 09:52:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:52:06,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923024525] [2021-01-06 09:52:06,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:52:06,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:52:06,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754915126] [2021-01-06 09:52:06,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:52:06,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:06,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:52:06,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:52:06,767 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2021-01-06 09:52:06,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:06,923 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-01-06 09:52:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:52:06,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 09:52:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:06,948 INFO L225 Difference]: With dead ends: 51 [2021-01-06 09:52:06,949 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 09:52:06,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:52:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 09:52:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 09:52:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 09:52:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-01-06 09:52:06,998 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2021-01-06 09:52:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:06,998 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-01-06 09:52:06,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:52:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-01-06 09:52:06,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 09:52:07,000 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:07,000 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 09:52:07,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:52:07,000 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:07,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1833326096, now seen corresponding path program 1 times [2021-01-06 09:52:07,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:07,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615242685] [2021-01-06 09:52:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:52:07,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615242685] [2021-01-06 09:52:07,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205900125] [2021-01-06 09:52:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:52:07,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:52:07,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:07,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:52:07,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598849564] [2021-01-06 09:52:07,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:52:07,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:07,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:52:07,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:52:07,279 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2021-01-06 09:52:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:07,408 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-01-06 09:52:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:52:07,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2021-01-06 09:52:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:07,410 INFO L225 Difference]: With dead ends: 54 [2021-01-06 09:52:07,410 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:52:07,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:52:07,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:52:07,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 09:52:07,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 09:52:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-01-06 09:52:07,419 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2021-01-06 09:52:07,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:07,419 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-01-06 09:52:07,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:52:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-01-06 09:52:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:52:07,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:07,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:07,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:52:07,635 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:07,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:07,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1605379405, now seen corresponding path program 2 times [2021-01-06 09:52:07,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:07,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020463264] [2021-01-06 09:52:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 09:52:07,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020463264] [2021-01-06 09:52:07,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747237531] [2021-01-06 09:52:07,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:07,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:07,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:07,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:52:07,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 09:52:07,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:07,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:52:07,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514319656] [2021-01-06 09:52:07,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:52:07,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:07,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:52:07,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:52:07,850 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2021-01-06 09:52:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:07,940 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2021-01-06 09:52:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:52:07,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-01-06 09:52:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:07,941 INFO L225 Difference]: With dead ends: 65 [2021-01-06 09:52:07,942 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 09:52:07,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:52:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 09:52:07,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 09:52:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 09:52:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-01-06 09:52:07,951 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2021-01-06 09:52:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:07,951 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-01-06 09:52:07,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:52:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-01-06 09:52:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 09:52:07,953 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:07,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:08,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:08,162 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:08,164 INFO L82 PathProgramCache]: Analyzing trace with hash 777570992, now seen corresponding path program 3 times [2021-01-06 09:52:08,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:08,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163155898] [2021-01-06 09:52:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 09:52:08,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163155898] [2021-01-06 09:52:08,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819929535] [2021-01-06 09:52:08,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:08,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:52:08,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:08,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:52:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 09:52:08,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:08,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:52:08,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451310912] [2021-01-06 09:52:08,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:52:08,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:08,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:52:08,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:52:08,456 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2021-01-06 09:52:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:08,538 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2021-01-06 09:52:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:52:08,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 09:52:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:08,539 INFO L225 Difference]: With dead ends: 76 [2021-01-06 09:52:08,540 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:52:08,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:52:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:52:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 09:52:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:52:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-01-06 09:52:08,549 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2021-01-06 09:52:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:08,549 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-01-06 09:52:08,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:52:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-01-06 09:52:08,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:52:08,550 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:08,551 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:08,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:08,766 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:08,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1875666669, now seen corresponding path program 4 times [2021-01-06 09:52:08,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:08,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750247811] [2021-01-06 09:52:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 09:52:08,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750247811] [2021-01-06 09:52:08,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972989910] [2021-01-06 09:52:08,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:08,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:52:08,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:08,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:52:08,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 09:52:08,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:08,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:52:08,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006785793] [2021-01-06 09:52:08,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:52:08,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:08,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:52:08,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:52:08,984 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2021-01-06 09:52:09,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:09,102 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2021-01-06 09:52:09,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:52:09,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-01-06 09:52:09,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:09,104 INFO L225 Difference]: With dead ends: 87 [2021-01-06 09:52:09,104 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 09:52:09,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:52:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 09:52:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 09:52:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 09:52:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-01-06 09:52:09,114 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 41 [2021-01-06 09:52:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:09,115 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-01-06 09:52:09,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:52:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-01-06 09:52:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 09:52:09,117 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:09,117 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:09,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:09,333 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:09,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash 742123344, now seen corresponding path program 5 times [2021-01-06 09:52:09,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:09,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623783886] [2021-01-06 09:52:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-01-06 09:52:09,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623783886] [2021-01-06 09:52:09,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946337516] [2021-01-06 09:52:09,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:10,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 09:52:10,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:10,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:52:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-01-06 09:52:10,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:10,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:52:10,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545044685] [2021-01-06 09:52:10,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:52:10,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:10,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:52:10,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:52:10,409 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 9 states. [2021-01-06 09:52:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:10,565 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2021-01-06 09:52:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:52:10,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2021-01-06 09:52:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:10,567 INFO L225 Difference]: With dead ends: 98 [2021-01-06 09:52:10,567 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:52:10,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:52:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:52:10,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-06 09:52:10,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 09:52:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-01-06 09:52:10,577 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2021-01-06 09:52:10,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:10,577 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-01-06 09:52:10,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:52:10,578 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-01-06 09:52:10,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:52:10,579 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:10,579 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:10,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:52:10,795 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:10,796 INFO L82 PathProgramCache]: Analyzing trace with hash 786050931, now seen corresponding path program 6 times [2021-01-06 09:52:10,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:10,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917075738] [2021-01-06 09:52:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 09:52:10,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917075738] [2021-01-06 09:52:10,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188749273] [2021-01-06 09:52:10,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:11,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 09:52:11,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:11,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:52:11,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 09:52:11,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:11,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:52:11,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741874444] [2021-01-06 09:52:11,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:52:11,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:11,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:52:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:52:11,647 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2021-01-06 09:52:11,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:11,776 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-01-06 09:52:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:52:11,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2021-01-06 09:52:11,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:11,778 INFO L225 Difference]: With dead ends: 109 [2021-01-06 09:52:11,778 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 09:52:11,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:52:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 09:52:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-01-06 09:52:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 09:52:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-01-06 09:52:11,790 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 53 [2021-01-06 09:52:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:11,791 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-01-06 09:52:11,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:52:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-01-06 09:52:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 09:52:11,793 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:11,793 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:12,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:12,006 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash 518106096, now seen corresponding path program 7 times [2021-01-06 09:52:12,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:12,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229580435] [2021-01-06 09:52:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-01-06 09:52:12,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229580435] [2021-01-06 09:52:12,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343137946] [2021-01-06 09:52:12,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:52:12,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-01-06 09:52:12,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:12,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:52:12,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296981283] [2021-01-06 09:52:12,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:52:12,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:12,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:52:12,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:52:12,457 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2021-01-06 09:52:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:12,626 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2021-01-06 09:52:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:52:12,627 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2021-01-06 09:52:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:12,628 INFO L225 Difference]: With dead ends: 120 [2021-01-06 09:52:12,629 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 09:52:12,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:52:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 09:52:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-01-06 09:52:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 09:52:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-01-06 09:52:12,640 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 59 [2021-01-06 09:52:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:12,640 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-01-06 09:52:12,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:52:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-01-06 09:52:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 09:52:12,642 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:12,642 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:12,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:12,856 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:12,857 INFO L82 PathProgramCache]: Analyzing trace with hash -820929069, now seen corresponding path program 8 times [2021-01-06 09:52:12,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:12,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795282217] [2021-01-06 09:52:12,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-01-06 09:52:12,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795282217] [2021-01-06 09:52:12,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810653740] [2021-01-06 09:52:12,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:13,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:13,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:13,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:52:13,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-01-06 09:52:13,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:13,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:52:13,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928747703] [2021-01-06 09:52:13,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:52:13,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:13,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:52:13,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:52:13,190 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 12 states. [2021-01-06 09:52:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:13,323 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2021-01-06 09:52:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:52:13,324 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2021-01-06 09:52:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:13,325 INFO L225 Difference]: With dead ends: 131 [2021-01-06 09:52:13,325 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 09:52:13,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:52:13,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 09:52:13,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-01-06 09:52:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 09:52:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-01-06 09:52:13,335 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 65 [2021-01-06 09:52:13,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:13,336 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-01-06 09:52:13,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:52:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-01-06 09:52:13,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 09:52:13,337 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:13,338 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:13,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:52:13,551 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:13,552 INFO L82 PathProgramCache]: Analyzing trace with hash 884742288, now seen corresponding path program 9 times [2021-01-06 09:52:13,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:13,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599871151] [2021-01-06 09:52:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:52:13,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599871151] [2021-01-06 09:52:13,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109475479] [2021-01-06 09:52:13,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:20,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:52:20,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:20,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:52:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:52:20,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:20,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:52:20,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17185860] [2021-01-06 09:52:20,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:52:20,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:20,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:52:20,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:52:20,632 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 13 states. [2021-01-06 09:52:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:20,772 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2021-01-06 09:52:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:52:20,773 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2021-01-06 09:52:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:20,774 INFO L225 Difference]: With dead ends: 142 [2021-01-06 09:52:20,774 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 09:52:20,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:52:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 09:52:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-01-06 09:52:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 09:52:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-01-06 09:52:20,806 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 71 [2021-01-06 09:52:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:20,807 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-01-06 09:52:20,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:52:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-01-06 09:52:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 09:52:20,813 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:20,813 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:21,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:21,025 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:21,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:21,026 INFO L82 PathProgramCache]: Analyzing trace with hash 489153587, now seen corresponding path program 10 times [2021-01-06 09:52:21,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:21,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549368422] [2021-01-06 09:52:21,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-01-06 09:52:21,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549368422] [2021-01-06 09:52:21,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512058689] [2021-01-06 09:52:21,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:21,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:52:21,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:21,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:52:21,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-01-06 09:52:21,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:21,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:52:21,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547211534] [2021-01-06 09:52:21,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:52:21,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:21,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:52:21,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:52:21,501 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 14 states. [2021-01-06 09:52:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:21,668 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2021-01-06 09:52:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:52:21,669 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2021-01-06 09:52:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:21,670 INFO L225 Difference]: With dead ends: 153 [2021-01-06 09:52:21,670 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 09:52:21,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:52:21,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 09:52:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-01-06 09:52:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 09:52:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-01-06 09:52:21,684 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 77 [2021-01-06 09:52:21,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:21,685 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-01-06 09:52:21,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:52:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-01-06 09:52:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 09:52:21,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:21,687 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:21,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:21,902 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:21,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:21,903 INFO L82 PathProgramCache]: Analyzing trace with hash 851258672, now seen corresponding path program 11 times [2021-01-06 09:52:21,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:21,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233918518] [2021-01-06 09:52:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 09:52:22,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233918518] [2021-01-06 09:52:22,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770212817] [2021-01-06 09:52:22,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true