/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_init8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:52:17,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:52:17,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:52:17,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:52:17,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:52:17,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:52:17,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:52:17,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:52:17,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:52:17,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:52:17,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:52:17,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:52:17,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:52:17,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:52:17,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:52:17,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:52:17,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:52:17,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:52:17,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:52:17,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:52:17,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:52:17,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:52:17,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:52:17,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:52:17,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 09:52:17,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 09:52:17,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 09:52:17,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 09:52:17,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 09:52:17,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 09:52:17,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:52:17,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:52:17,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:52:17,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:52:17,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:52:17,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:52:17,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:52:17,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:52:17,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:52:17,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:52:17,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:52:17,773 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 09:52:17,825 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:52:17,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:52:17,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:52:17,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:52:17,832 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:52:17,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:52:17,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:52:17,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:52:17,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:52:17,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:52:17,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:52:17,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:52:17,835 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:52:17,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:52:17,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:52:17,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:52:17,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:52:17,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:52:17,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:52:17,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:52:17,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:52:17,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:52:17,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:52:17,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:52:17,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:52:17,838 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:52:18,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:52:18,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:52:18,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:52:18,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:52:18,272 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:52:18,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init8_ground-2.i [2021-01-06 09:52:18,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a9cf404e4/20840d8f0faa42ff98c77d24849c4dfa/FLAGdcb289412 [2021-01-06 09:52:19,045 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:52:19,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init8_ground-2.i [2021-01-06 09:52:19,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a9cf404e4/20840d8f0faa42ff98c77d24849c4dfa/FLAGdcb289412 [2021-01-06 09:52:19,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a9cf404e4/20840d8f0faa42ff98c77d24849c4dfa [2021-01-06 09:52:19,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:52:19,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:52:19,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:52:19,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:52:19,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:52:19,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:52:19" (1/1) ... [2021-01-06 09:52:19,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e3f9d36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19, skipping insertion in model container [2021-01-06 09:52:19,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:52:19" (1/1) ... [2021-01-06 09:52:19,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:52:19,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:52:19,683 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_init8_ground-2.i[816,829] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~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 09:52:19,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:52:19,720 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:52:19,735 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_init8_ground-2.i[816,829] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~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 09:52:19,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:52:19,766 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:52:19,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19 WrapperNode [2021-01-06 09:52:19,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:52:19,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:52:19,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:52:19,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:52:19,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19" (1/1) ... [2021-01-06 09:52:19,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19" (1/1) ... [2021-01-06 09:52:19,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:52:19,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:52:19,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:52:19,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:52:19,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19" (1/1) ... [2021-01-06 09:52:19,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19" (1/1) ... [2021-01-06 09:52:19,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19" (1/1) ... [2021-01-06 09:52:19,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19" (1/1) ... [2021-01-06 09:52:19,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19" (1/1) ... [2021-01-06 09:52:19,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19" (1/1) ... [2021-01-06 09:52:19,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19" (1/1) ... [2021-01-06 09:52:19,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:52:19,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:52:19,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:52:19,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:52:19,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19" (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 09:52:20,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:52:20,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:52:20,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:52:20,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:52:20,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:52:20,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:52:20,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:52:20,425 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:52:20,425 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 09:52:20,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:52:20 BoogieIcfgContainer [2021-01-06 09:52:20,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:52:20,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:52:20,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:52:20,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:52:20,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:52:19" (1/3) ... [2021-01-06 09:52:20,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4490978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:52:20, skipping insertion in model container [2021-01-06 09:52:20,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:19" (2/3) ... [2021-01-06 09:52:20,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4490978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:52:20, skipping insertion in model container [2021-01-06 09:52:20,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:52:20" (3/3) ... [2021-01-06 09:52:20,437 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-2.i [2021-01-06 09:52:20,445 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:52:20,450 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:52:20,472 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:52:20,510 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:52:20,510 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:52:20,510 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:52:20,510 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:52:20,511 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:52:20,511 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:52:20,511 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:52:20,511 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:52:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2021-01-06 09:52:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:52:20,540 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:20,541 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] [2021-01-06 09:52:20,541 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:20,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:20,553 INFO L82 PathProgramCache]: Analyzing trace with hash 730030661, now seen corresponding path program 1 times [2021-01-06 09:52:20,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:20,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734043675] [2021-01-06 09:52:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:20,884 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 09:52:20,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734043675] [2021-01-06 09:52:20,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:52:20,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:52:20,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899573337] [2021-01-06 09:52:20,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:52:20,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:20,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:52:20,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:52:20,928 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2021-01-06 09:52:21,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:21,164 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-01-06 09:52:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:52:21,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-01-06 09:52:21,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:21,189 INFO L225 Difference]: With dead ends: 61 [2021-01-06 09:52:21,189 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:52:21,193 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 09:52:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:52:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 09:52:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 09:52:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-01-06 09:52:21,244 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 21 [2021-01-06 09:52:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:21,245 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-01-06 09:52:21,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:52:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-01-06 09:52:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:52:21,250 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:21,250 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] [2021-01-06 09:52:21,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:52:21,252 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:21,258 INFO L82 PathProgramCache]: Analyzing trace with hash 798141757, now seen corresponding path program 1 times [2021-01-06 09:52:21,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:21,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797302261] [2021-01-06 09:52:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 09:52:21,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797302261] [2021-01-06 09:52:21,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680616848] [2021-01-06 09:52:21,476 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 09:52:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:21,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:52:21,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 09:52:21,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:21,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:52:21,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496328325] [2021-01-06 09:52:21,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:52:21,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:21,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:52:21,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:52:21,661 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 5 states. [2021-01-06 09:52:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:21,823 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2021-01-06 09:52:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:52:21,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2021-01-06 09:52:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:21,827 INFO L225 Difference]: With dead ends: 68 [2021-01-06 09:52:21,828 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 09:52:21,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 09:52:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 09:52:21,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 09:52:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 09:52:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-01-06 09:52:21,849 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 29 [2021-01-06 09:52:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:21,849 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-01-06 09:52:21,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:52:21,849 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-01-06 09:52:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 09:52:21,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:21,853 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 09:52:22,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:52:22,070 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1968111935, now seen corresponding path program 2 times [2021-01-06 09:52:22,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:22,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519084273] [2021-01-06 09:52:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 09:52:22,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519084273] [2021-01-06 09:52:22,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729927887] [2021-01-06 09:52:22,258 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 09:52:22,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:22,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:22,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:52:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 09:52:22,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:22,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:52:22,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472432158] [2021-01-06 09:52:22,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:52:22,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:22,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:52:22,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:52:22,376 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2021-01-06 09:52:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:22,500 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2021-01-06 09:52:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:52:22,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2021-01-06 09:52:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:22,502 INFO L225 Difference]: With dead ends: 83 [2021-01-06 09:52:22,502 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 09:52:22,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 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 09:52:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 09:52:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 09:52:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 09:52:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-01-06 09:52:22,512 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2021-01-06 09:52:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:22,512 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-01-06 09:52:22,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:52:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-01-06 09:52:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 09:52:22,514 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:22,514 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 09:52:22,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:22,730 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:22,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1959606083, now seen corresponding path program 3 times [2021-01-06 09:52:22,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:22,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462107434] [2021-01-06 09:52:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-01-06 09:52:22,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462107434] [2021-01-06 09:52:22,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951276142] [2021-01-06 09:52:22,819 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 09:52:23,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:52:23,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:23,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:52:23,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-01-06 09:52:23,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:23,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:52:23,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767121162] [2021-01-06 09:52:23,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:52:23,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:23,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:52:23,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:52:23,145 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 7 states. [2021-01-06 09:52:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:23,253 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2021-01-06 09:52:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:52:23,254 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2021-01-06 09:52:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:23,255 INFO L225 Difference]: With dead ends: 98 [2021-01-06 09:52:23,255 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:52:23,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 09:52:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:52:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-06 09:52:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 09:52:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-01-06 09:52:23,265 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 45 [2021-01-06 09:52:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:23,265 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-01-06 09:52:23,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:52:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-01-06 09:52:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:52:23,267 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:23,268 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 09:52:23,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:23,483 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:23,484 INFO L82 PathProgramCache]: Analyzing trace with hash -33175999, now seen corresponding path program 4 times [2021-01-06 09:52:23,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:23,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387401339] [2021-01-06 09:52:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 09:52:23,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387401339] [2021-01-06 09:52:23,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410827450] [2021-01-06 09:52:23,583 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 09:52:23,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:52:23,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:52:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 09:52:23,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:23,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:52:23,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261915162] [2021-01-06 09:52:23,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:52:23,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:23,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:52:23,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:52:23,728 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2021-01-06 09:52:23,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:23,891 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2021-01-06 09:52:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:52:23,892 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2021-01-06 09:52:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:23,896 INFO L225 Difference]: With dead ends: 113 [2021-01-06 09:52:23,896 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:52:23,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 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 09:52:23,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:52:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-01-06 09:52:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:52:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-01-06 09:52:23,915 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 53 [2021-01-06 09:52:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:23,915 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-01-06 09:52:23,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:52:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-01-06 09:52:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:52:23,919 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:23,920 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 09:52:24,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:24,138 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:24,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:24,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1705114563, now seen corresponding path program 5 times [2021-01-06 09:52:24,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:24,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324446593] [2021-01-06 09:52:24,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 09:52:24,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324446593] [2021-01-06 09:52:24,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812915861] [2021-01-06 09:52:24,318 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 09:52:40,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 09:52:40,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:40,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:52:40,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 09:52:40,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:40,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:52:40,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897558334] [2021-01-06 09:52:40,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:52:40,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:40,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:52:40,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:52:40,146 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 9 states. [2021-01-06 09:52:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:40,331 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2021-01-06 09:52:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:52:40,331 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2021-01-06 09:52:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:40,332 INFO L225 Difference]: With dead ends: 128 [2021-01-06 09:52:40,332 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 09:52:40,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 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 09:52:40,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 09:52:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 09:52:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 09:52:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-01-06 09:52:40,342 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 61 [2021-01-06 09:52:40,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:40,342 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-01-06 09:52:40,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:52:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-01-06 09:52:40,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 09:52:40,343 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:40,344 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 09:52:40,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:52:40,545 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1731269183, now seen corresponding path program 6 times [2021-01-06 09:52:40,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:40,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044047114] [2021-01-06 09:52:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-01-06 09:52:40,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044047114] [2021-01-06 09:52:40,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745590732] [2021-01-06 09:52:40,721 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 09:52:44,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 09:52:44,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:44,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:52:44,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-01-06 09:52:45,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:45,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:52:45,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472535666] [2021-01-06 09:52:45,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:52:45,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:45,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:52:45,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:52:45,023 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 10 states. [2021-01-06 09:52:45,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:45,192 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-01-06 09:52:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:52:45,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2021-01-06 09:52:45,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:45,194 INFO L225 Difference]: With dead ends: 143 [2021-01-06 09:52:45,194 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 09:52:45,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 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 09:52:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 09:52:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-01-06 09:52:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 09:52:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2021-01-06 09:52:45,204 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 69 [2021-01-06 09:52:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:45,204 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2021-01-06 09:52:45,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:52:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2021-01-06 09:52:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 09:52:45,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:45,206 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 09:52:45,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:45,407 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:45,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1733009475, now seen corresponding path program 7 times [2021-01-06 09:52:45,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:45,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425160445] [2021-01-06 09:52:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:52:45,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425160445] [2021-01-06 09:52:45,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125914682] [2021-01-06 09:52:45,540 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 09:52:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:45,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:52:45,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:52:45,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:45,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:52:45,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042260173] [2021-01-06 09:52:45,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:52:45,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:45,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:52:45,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:52:45,724 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 11 states. [2021-01-06 09:52:45,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:45,915 INFO L93 Difference]: Finished difference Result 158 states and 181 transitions. [2021-01-06 09:52:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:52:45,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2021-01-06 09:52:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:45,917 INFO L225 Difference]: With dead ends: 158 [2021-01-06 09:52:45,917 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 09:52:45,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 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 09:52:45,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 09:52:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-01-06 09:52:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 09:52:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-01-06 09:52:45,927 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 77 [2021-01-06 09:52:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:45,927 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-01-06 09:52:45,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:52:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-01-06 09:52:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 09:52:45,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:45,929 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:46,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:46,144 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:46,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1139569985, now seen corresponding path program 8 times [2021-01-06 09:52:46,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:46,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734399752] [2021-01-06 09:52:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-01-06 09:52:46,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734399752] [2021-01-06 09:52:46,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956785619] [2021-01-06 09:52:46,296 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 09:52:46,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:46,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:46,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:52:46,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-01-06 09:52:46,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:46,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:52:46,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855838819] [2021-01-06 09:52:46,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:52:46,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:46,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:52:46,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:52:46,489 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 12 states. [2021-01-06 09:52:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:46,690 INFO L93 Difference]: Finished difference Result 173 states and 196 transitions. [2021-01-06 09:52:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:52:46,691 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2021-01-06 09:52:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:46,692 INFO L225 Difference]: With dead ends: 173 [2021-01-06 09:52:46,692 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 09:52:46,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 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 09:52:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 09:52:46,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-01-06 09:52:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 09:52:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-01-06 09:52:46,710 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 85 [2021-01-06 09:52:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:46,713 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-01-06 09:52:46,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:52:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-01-06 09:52:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 09:52:46,715 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:46,715 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:46,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:52:46,934 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:46,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1607850813, now seen corresponding path program 9 times [2021-01-06 09:52:46,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:46,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266159268] [2021-01-06 09:52:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-01-06 09:52:47,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266159268] [2021-01-06 09:52:47,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939619051] [2021-01-06 09:52:47,158 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 09:53:27,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:53:27,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:53:27,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:53:27,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:53:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-01-06 09:53:28,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:53:28,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:53:28,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757225847] [2021-01-06 09:53:28,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:53:28,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:53:28,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:53:28,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:53:28,019 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 13 states. [2021-01-06 09:53:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:53:28,235 INFO L93 Difference]: Finished difference Result 188 states and 211 transitions. [2021-01-06 09:53:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:53:28,235 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 93 [2021-01-06 09:53:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:53:28,236 INFO L225 Difference]: With dead ends: 188 [2021-01-06 09:53:28,236 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 09:53:28,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 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 09:53:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 09:53:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-01-06 09:53:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 09:53:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2021-01-06 09:53:28,246 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 93 [2021-01-06 09:53:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:53:28,247 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2021-01-06 09:53:28,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:53:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2021-01-06 09:53:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 09:53:28,248 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:53:28,248 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:53:28,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:53:28,460 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:53:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:53:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1782471873, now seen corresponding path program 10 times [2021-01-06 09:53:28,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:53:28,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366195028] [2021-01-06 09:53:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:53:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:53:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-01-06 09:53:28,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366195028] [2021-01-06 09:53:28,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921082761] [2021-01-06 09:53:28,644 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 09:53:28,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:53:28,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:53:28,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:53:28,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:53:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-01-06 09:53:28,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:53:28,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:53:28,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431636955] [2021-01-06 09:53:28,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:53:28,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:53:28,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:53:28,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:53:28,916 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 14 states. [2021-01-06 09:53:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:53:29,138 INFO L93 Difference]: Finished difference Result 203 states and 226 transitions. [2021-01-06 09:53:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:53:29,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 101 [2021-01-06 09:53:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:53:29,139 INFO L225 Difference]: With dead ends: 203 [2021-01-06 09:53:29,140 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 09:53:29,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 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 09:53:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 09:53:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-01-06 09:53:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 09:53:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2021-01-06 09:53:29,148 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 101 [2021-01-06 09:53:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:53:29,149 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2021-01-06 09:53:29,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:53:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2021-01-06 09:53:29,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-06 09:53:29,150 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:53:29,150 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:53:29,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:53:29,364 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:53:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:53:29,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1734506173, now seen corresponding path program 11 times [2021-01-06 09:53:29,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:53:29,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150937707] [2021-01-06 09:53:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:53:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:53:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2021-01-06 09:53:29,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150937707] [2021-01-06 09:53:29,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450169613] [2021-01-06 09:53:29,636 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