/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_init9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:52:36,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:52:36,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:52:36,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:52:36,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:52:36,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:52:36,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:52:36,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:52:36,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:52:36,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:52:36,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:52:36,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:52:36,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:52:36,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:52:36,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:52:36,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:52:36,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:52:36,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:52:36,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:52:36,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:52:36,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:52:36,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:52:36,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:52:36,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:52:36,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 09:52:36,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 09:52:36,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 09:52:36,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 09:52:36,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 09:52:36,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 09:52:36,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:52:36,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:52:36,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:52:36,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:52:36,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:52:36,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:52:36,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:52:36,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:52:36,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:52:36,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:52:36,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:52:36,617 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 09:52:36,671 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:52:36,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:52:36,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:52:36,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:52:36,677 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:52:36,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:52:36,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:52:36,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:52:36,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:52:36,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:52:36,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:52:36,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:52:36,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:52:36,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:52:36,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:52:36,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:52:36,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:52:36,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:52:36,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:52:36,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:52:36,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:52:36,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:52:36,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:52:36,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:52:36,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:52:36,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:52:37,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:52:37,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:52:37,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:52:37,191 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:52:37,191 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:52:37,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init9_ground-1.i [2021-01-06 09:52:37,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6b119b90/1151865cdd5e457a80f97f78eb47d4d1/FLAG4f6850604 [2021-01-06 09:52:37,898 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:52:37,899 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init9_ground-1.i [2021-01-06 09:52:37,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6b119b90/1151865cdd5e457a80f97f78eb47d4d1/FLAG4f6850604 [2021-01-06 09:52:38,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6b119b90/1151865cdd5e457a80f97f78eb47d4d1 [2021-01-06 09:52:38,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:52:38,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:52:38,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:52:38,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:52:38,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:52:38,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:52:38" (1/1) ... [2021-01-06 09:52:38,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53604c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38, skipping insertion in model container [2021-01-06 09:52:38,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:52:38" (1/1) ... [2021-01-06 09:52:38,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:52:38,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:52:38,495 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_init9_ground-1.i[816,829] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~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 09:52:38,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:52:38,535 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:52:38,551 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_init9_ground-1.i[816,829] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~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 09:52:38,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:52:38,588 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:52:38,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38 WrapperNode [2021-01-06 09:52:38,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:52:38,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:52:38,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:52:38,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:52:38,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38" (1/1) ... [2021-01-06 09:52:38,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38" (1/1) ... [2021-01-06 09:52:38,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:52:38,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:52:38,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:52:38,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:52:38,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38" (1/1) ... [2021-01-06 09:52:38,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38" (1/1) ... [2021-01-06 09:52:38,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38" (1/1) ... [2021-01-06 09:52:38,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38" (1/1) ... [2021-01-06 09:52:38,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38" (1/1) ... [2021-01-06 09:52:38,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38" (1/1) ... [2021-01-06 09:52:38,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38" (1/1) ... [2021-01-06 09:52:38,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:52:38,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:52:38,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:52:38,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:52:38,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38" (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 09:52:38,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:52:38,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:52:38,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:52:38,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:52:38,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:52:38,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:52:38,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:52:39,279 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:52:39,280 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-01-06 09:52:39,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:52:39 BoogieIcfgContainer [2021-01-06 09:52:39,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:52:39,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:52:39,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:52:39,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:52:39,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:52:38" (1/3) ... [2021-01-06 09:52:39,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce05891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:52:39, skipping insertion in model container [2021-01-06 09:52:39,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:52:38" (2/3) ... [2021-01-06 09:52:39,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce05891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:52:39, skipping insertion in model container [2021-01-06 09:52:39,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:52:39" (3/3) ... [2021-01-06 09:52:39,292 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-1.i [2021-01-06 09:52:39,300 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:52:39,306 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:52:39,328 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:52:39,362 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:52:39,362 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:52:39,362 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:52:39,362 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:52:39,363 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:52:39,363 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:52:39,363 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:52:39,363 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:52:39,382 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-01-06 09:52:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 09:52:39,394 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:39,395 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 09:52:39,396 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:39,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:39,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1478943884, now seen corresponding path program 1 times [2021-01-06 09:52:39,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:39,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678576806] [2021-01-06 09:52:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:39,618 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 09:52:39,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678576806] [2021-01-06 09:52:39,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:52:39,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:52:39,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828873780] [2021-01-06 09:52:39,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:52:39,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:39,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:52:39,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:52:39,649 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2021-01-06 09:52:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:39,817 INFO L93 Difference]: Finished difference Result 66 states and 122 transitions. [2021-01-06 09:52:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:52:39,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-01-06 09:52:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:39,830 INFO L225 Difference]: With dead ends: 66 [2021-01-06 09:52:39,830 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 09:52:39,834 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 09:52:39,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 09:52:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 09:52:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 09:52:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-01-06 09:52:39,886 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2021-01-06 09:52:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:39,887 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-01-06 09:52:39,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:52:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-01-06 09:52:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 09:52:39,889 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:39,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:39,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:52:39,890 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:39,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:39,891 INFO L82 PathProgramCache]: Analyzing trace with hash 527193407, now seen corresponding path program 1 times [2021-01-06 09:52:39,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:39,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013710892] [2021-01-06 09:52:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 09:52:39,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013710892] [2021-01-06 09:52:39,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009915442] [2021-01-06 09:52:39,955 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 09:52:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:40,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:52:40,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 09:52:40,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:40,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:52:40,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328217035] [2021-01-06 09:52:40,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:52:40,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:40,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:52:40,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:52:40,221 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2021-01-06 09:52:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:40,328 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2021-01-06 09:52:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:52:40,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2021-01-06 09:52:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:40,330 INFO L225 Difference]: With dead ends: 75 [2021-01-06 09:52:40,330 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:52:40,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 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 09:52:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:52:40,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 09:52:40,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:52:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-01-06 09:52:40,342 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 32 [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 44 states and 53 transitions. [2021-01-06 09:52:40,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:52:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-01-06 09:52:40,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:52:40,344 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:40,344 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:40,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:52:40,558 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash -368986008, now seen corresponding path program 2 times [2021-01-06 09:52:40,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:40,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356684723] [2021-01-06 09:52:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 09:52:40,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356684723] [2021-01-06 09:52:40,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080467179] [2021-01-06 09:52:40,695 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 09:52:40,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:52:40,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:40,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:52:40,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 09:52:40,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:40,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:52:40,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289974994] [2021-01-06 09:52:40,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:52:40,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:40,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:52:40,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:52:40,873 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2021-01-06 09:52:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:40,990 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2021-01-06 09:52:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:52:40,990 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2021-01-06 09:52:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:40,992 INFO L225 Difference]: With dead ends: 92 [2021-01-06 09:52:40,992 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 09:52:40,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 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 09:52:40,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 09:52:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-01-06 09:52:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 09:52:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-01-06 09:52:41,003 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 41 [2021-01-06 09:52:41,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:41,003 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-01-06 09:52:41,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:52:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-01-06 09:52:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 09:52:41,005 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:41,006 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:41,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:41,221 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:41,223 INFO L82 PathProgramCache]: Analyzing trace with hash 763354719, now seen corresponding path program 3 times [2021-01-06 09:52:41,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:41,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263743227] [2021-01-06 09:52:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:52:41,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263743227] [2021-01-06 09:52:41,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850364355] [2021-01-06 09:52:41,321 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 09:52:41,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:52:41,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:52:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:52:41,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:41,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:52:41,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432150591] [2021-01-06 09:52:41,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:52:41,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:41,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:52:41,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:52:41,562 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 7 states. [2021-01-06 09:52:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:41,693 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2021-01-06 09:52:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:52:41,693 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2021-01-06 09:52:41,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:41,695 INFO L225 Difference]: With dead ends: 109 [2021-01-06 09:52:41,695 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 09:52:41,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 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 09:52:41,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 09:52:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-01-06 09:52:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 09:52:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-01-06 09:52:41,706 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 50 [2021-01-06 09:52:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:41,706 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-01-06 09:52:41,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:52:41,706 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-01-06 09:52:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 09:52:41,708 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:41,708 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:41,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:41,923 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:41,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:41,924 INFO L82 PathProgramCache]: Analyzing trace with hash -500879800, now seen corresponding path program 4 times [2021-01-06 09:52:41,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:41,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808807684] [2021-01-06 09:52:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-01-06 09:52:42,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808807684] [2021-01-06 09:52:42,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238169563] [2021-01-06 09:52:42,042 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 09:52:42,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:52:42,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:52:42,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:52:42,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:52:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-01-06 09:52:42,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:52:42,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:52:42,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496414057] [2021-01-06 09:52:42,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:52:42,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:52:42,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:52:42,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:52:42,243 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2021-01-06 09:52:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:52:42,425 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2021-01-06 09:52:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:52:42,425 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2021-01-06 09:52:42,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:52:42,427 INFO L225 Difference]: With dead ends: 126 [2021-01-06 09:52:42,427 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 09:52:42,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 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 09:52:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 09:52:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-01-06 09:52:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 09:52:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-01-06 09:52:42,439 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 59 [2021-01-06 09:52:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:52:42,440 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-01-06 09:52:42,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:52:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-01-06 09:52:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 09:52:42,442 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:52:42,443 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:52:42,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:52:42,657 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:52:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:52:42,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1617731713, now seen corresponding path program 5 times [2021-01-06 09:52:42,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:52:42,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695450664] [2021-01-06 09:52:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:52:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:52:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-01-06 09:52:42,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695450664] [2021-01-06 09:52:42,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631756722] [2021-01-06 09:52:42,794 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 09:53:06,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 09:53:06,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:53:06,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:53:06,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:53:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-01-06 09:53:06,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:53:06,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:53:06,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553972217] [2021-01-06 09:53:06,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:53:06,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:53:06,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:53:06,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:53:06,380 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 9 states. [2021-01-06 09:53:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:53:06,594 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2021-01-06 09:53:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:53:06,595 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2021-01-06 09:53:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:53:06,596 INFO L225 Difference]: With dead ends: 143 [2021-01-06 09:53:06,596 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 09:53:06,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 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 09:53:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 09:53:06,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-01-06 09:53:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 09:53:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-01-06 09:53:06,608 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 68 [2021-01-06 09:53:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:53:06,608 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-01-06 09:53:06,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:53:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-01-06 09:53:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 09:53:06,611 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:53:06,611 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:53:06,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:53:06,812 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:53:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:53:06,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1599394776, now seen corresponding path program 6 times [2021-01-06 09:53:06,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:53:06,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778868031] [2021-01-06 09:53:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:53:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:53:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-01-06 09:53:07,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778868031] [2021-01-06 09:53:07,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021338081] [2021-01-06 09:53:07,026 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 09:53:11,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 09:53:11,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:53:11,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:53:11,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:53:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-01-06 09:53:11,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:53:11,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:53:11,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120541580] [2021-01-06 09:53:11,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:53:11,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:53:11,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:53:11,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:53:11,730 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 10 states. [2021-01-06 09:53:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:53:11,916 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2021-01-06 09:53:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:53:11,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2021-01-06 09:53:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:53:11,919 INFO L225 Difference]: With dead ends: 160 [2021-01-06 09:53:11,919 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 09:53:11,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 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 09:53:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 09:53:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-01-06 09:53:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 09:53:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2021-01-06 09:53:11,931 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 77 [2021-01-06 09:53:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:53:11,932 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2021-01-06 09:53:11,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:53:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2021-01-06 09:53:11,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 09:53:11,936 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:53:11,936 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:53:12,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:53:12,152 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:53:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:53:12,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1824577695, now seen corresponding path program 7 times [2021-01-06 09:53:12,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:53:12,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129768098] [2021-01-06 09:53:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:53:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:53:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-01-06 09:53:12,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129768098] [2021-01-06 09:53:12,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402336158] [2021-01-06 09:53:12,290 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 09:53:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:53:12,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:53:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:53:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-01-06 09:53:12,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:53:12,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:53:12,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396983126] [2021-01-06 09:53:12,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:53:12,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:53:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:53:12,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:53:12,512 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 11 states. [2021-01-06 09:53:12,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:53:12,724 INFO L93 Difference]: Finished difference Result 177 states and 203 transitions. [2021-01-06 09:53:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:53:12,725 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2021-01-06 09:53:12,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:53:12,728 INFO L225 Difference]: With dead ends: 177 [2021-01-06 09:53:12,729 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 09:53:12,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 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 09:53:12,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 09:53:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-01-06 09:53:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 09:53:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2021-01-06 09:53:12,764 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 86 [2021-01-06 09:53:12,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:53:12,764 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2021-01-06 09:53:12,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:53:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2021-01-06 09:53:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 09:53:12,767 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:53:12,768 INFO L422 BasicCegarLoop]: trace histogram [8, 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, 1, 1] [2021-01-06 09:53:12,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:53:12,986 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:53:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:53:12,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1137069560, now seen corresponding path program 8 times [2021-01-06 09:53:12,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:53:12,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709344325] [2021-01-06 09:53:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:53:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:53:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:53:13,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709344325] [2021-01-06 09:53:13,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240126889] [2021-01-06 09:53:13,134 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 09:53:13,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:53:13,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:53:13,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:53:13,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:53:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:53:13,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:53:13,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:53:13,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407335393] [2021-01-06 09:53:13,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:53:13,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:53:13,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:53:13,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:53:13,388 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand 12 states. [2021-01-06 09:53:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:53:13,635 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2021-01-06 09:53:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:53:13,636 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 95 [2021-01-06 09:53:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:53:13,638 INFO L225 Difference]: With dead ends: 194 [2021-01-06 09:53:13,638 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 09:53:13,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 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 09:53:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 09:53:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-01-06 09:53:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 09:53:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2021-01-06 09:53:13,652 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 95 [2021-01-06 09:53:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:53:13,652 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2021-01-06 09:53:13,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:53:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2021-01-06 09:53:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 09:53:13,654 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:53:13,655 INFO L422 BasicCegarLoop]: trace histogram [9, 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, 1, 1] [2021-01-06 09:53:13,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:53:13,871 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:53:13,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:53:13,872 INFO L82 PathProgramCache]: Analyzing trace with hash -6141505, now seen corresponding path program 9 times [2021-01-06 09:53:13,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:53:13,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37021384] [2021-01-06 09:53:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:53:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:53:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-01-06 09:53:14,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37021384] [2021-01-06 09:53:14,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159667678] [2021-01-06 09:53:14,096 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 09:53:45,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:53:45,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:53:45,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:53:45,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:53:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-01-06 09:53:45,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:53:45,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:53:45,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866959796] [2021-01-06 09:53:45,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:53:45,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:53:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:53:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:53:45,956 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand 13 states. [2021-01-06 09:53:46,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:53:46,190 INFO L93 Difference]: Finished difference Result 211 states and 237 transitions. [2021-01-06 09:53:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:53:46,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 104 [2021-01-06 09:53:46,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:53:46,191 INFO L225 Difference]: With dead ends: 211 [2021-01-06 09:53:46,192 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 09:53:46,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 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 09:53:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 09:53:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-01-06 09:53:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 09:53:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-01-06 09:53:46,202 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 104 [2021-01-06 09:53:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:53:46,203 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-01-06 09:53:46,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:53:46,203 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-01-06 09:53:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-01-06 09:53:46,204 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:53:46,205 INFO L422 BasicCegarLoop]: trace histogram [10, 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, 1, 1] [2021-01-06 09:53:46,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:53:46,418 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:53:46,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:53:46,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1477001240, now seen corresponding path program 10 times [2021-01-06 09:53:46,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:53:46,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134346355] [2021-01-06 09:53:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:53:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:53:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-01-06 09:53:46,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134346355] [2021-01-06 09:53:46,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721568056] [2021-01-06 09:53:46,641 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 09:53:46,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:53:46,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:53:46,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:53:46,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:53:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-01-06 09:53:46,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:53:46,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:53:46,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932865535] [2021-01-06 09:53:46,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:53:46,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:53:46,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:53:46,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:53:46,916 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand 14 states. [2021-01-06 09:53:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:53:47,171 INFO L93 Difference]: Finished difference Result 228 states and 254 transitions. [2021-01-06 09:53:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:53:47,172 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 113 [2021-01-06 09:53:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:53:47,173 INFO L225 Difference]: With dead ends: 228 [2021-01-06 09:53:47,173 INFO L226 Difference]: Without dead ends: 125 [2021-01-06 09:53:47,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 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 09:53:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-06 09:53:47,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-01-06 09:53:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 09:53:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2021-01-06 09:53:47,184 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 113 [2021-01-06 09:53:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:53:47,184 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2021-01-06 09:53:47,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:53:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2021-01-06 09:53:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-01-06 09:53:47,186 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:53:47,186 INFO L422 BasicCegarLoop]: trace histogram [11, 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, 1, 1] [2021-01-06 09:53:47,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:53:47,401 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:53:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:53:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash -699288865, now seen corresponding path program 11 times [2021-01-06 09:53:47,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:53:47,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097910124] [2021-01-06 09:53:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:53:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:53:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-01-06 09:53:47,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097910124] [2021-01-06 09:53:47,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364417347] [2021-01-06 09:53:47,687 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