/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_copy7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:57:09,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:57:09,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:57:09,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:57:09,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:57:09,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:57:09,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:57:09,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:57:09,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:57:09,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:57:09,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:57:09,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:57:09,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:57:09,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:57:09,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:57:09,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:57:09,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:57:09,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:57:09,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:57:09,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:57:09,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:57:09,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:57:09,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:57:09,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:57:09,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:57:09,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 23:57:09,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 23:57:09,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 23:57:09,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 23:57:09,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 23:57:09,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 23:57:09,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 23:57:09,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 23:57:09,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:57:09,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:57:09,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:57:09,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:57:09,733 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:57:09,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:57:09,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:57:09,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:57:09,736 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:57:09,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:57:09,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:57:09,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:57:09,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:57:09,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:57:09,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:57:09,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:57:09,738 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:57:09,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:57:09,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:57:09,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:57:09,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:57:09,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:57:09,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:57:09,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:57:09,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:57:09,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:57:09,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:57:09,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:57:09,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:57:09,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:57:10,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:57:10,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:57:10,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:57:10,231 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:57:10,231 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:57:10,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy7_ground-2.i [2020-12-22 23:57:10,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/427e067c6/790d57fbbd75424794d51ed436f4ca60/FLAG9660e89f3 [2020-12-22 23:57:10,973 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:57:10,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-2.i [2020-12-22 23:57:10,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/427e067c6/790d57fbbd75424794d51ed436f4ca60/FLAG9660e89f3 [2020-12-22 23:57:11,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/427e067c6/790d57fbbd75424794d51ed436f4ca60 [2020-12-22 23:57:11,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:57:11,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:57:11,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:57:11,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:57:11,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:57:11,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:57:11" (1/1) ... [2020-12-22 23:57:11,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ddfb59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11, skipping insertion in model container [2020-12-22 23:57:11,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:57:11" (1/1) ... [2020-12-22 23:57:11,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:57:11,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:57:11,496 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_copy7_ground-2.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a4~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a5~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a6~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a7~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a8~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:57:11,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:57:11,549 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:57:11,573 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_copy7_ground-2.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a4~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a4~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a5~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a5~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a6~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a6~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a7~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a7~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a8~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a8~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:57:11,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:57:11,654 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:57:11,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11 WrapperNode [2020-12-22 23:57:11,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:57:11,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:57:11,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:57:11,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:57:11,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11" (1/1) ... [2020-12-22 23:57:11,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11" (1/1) ... [2020-12-22 23:57:11,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:57:11,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:57:11,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:57:11,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:57:11,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11" (1/1) ... [2020-12-22 23:57:11,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11" (1/1) ... [2020-12-22 23:57:11,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11" (1/1) ... [2020-12-22 23:57:11,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11" (1/1) ... [2020-12-22 23:57:11,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11" (1/1) ... [2020-12-22 23:57:11,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11" (1/1) ... [2020-12-22 23:57:11,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11" (1/1) ... [2020-12-22 23:57:11,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:57:11,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:57:11,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:57:11,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:57:11,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11" (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 [2020-12-22 23:57:11,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:57:11,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:57:11,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:57:11,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:57:11,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:57:11,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:57:11,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:57:12,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:57:12,594 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-22 23:57:12,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:57:12 BoogieIcfgContainer [2020-12-22 23:57:12,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:57:12,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:57:12,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:57:12,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:57:12,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:57:11" (1/3) ... [2020-12-22 23:57:12,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e699fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:57:12, skipping insertion in model container [2020-12-22 23:57:12,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:11" (2/3) ... [2020-12-22 23:57:12,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e699fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:57:12, skipping insertion in model container [2020-12-22 23:57:12,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:57:12" (3/3) ... [2020-12-22 23:57:12,606 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2020-12-22 23:57:12,613 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:57:12,618 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:57:12,642 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:57:12,674 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:57:12,674 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:57:12,675 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:57:12,675 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:57:12,675 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:57:12,675 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:57:12,675 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:57:12,676 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:57:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-12-22 23:57:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 23:57:12,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:12,700 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] [2020-12-22 23:57:12,701 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:12,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:12,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1647230389, now seen corresponding path program 1 times [2020-12-22 23:57:12,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:12,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750870123] [2020-12-22 23:57:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:57:12,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750870123] [2020-12-22 23:57:12,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:57:12,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:57:12,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592704686] [2020-12-22 23:57:12,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:57:12,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:12,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:57:12,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:57:12,971 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-12-22 23:57:13,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:13,016 INFO L93 Difference]: Finished difference Result 70 states and 106 transitions. [2020-12-22 23:57:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:57:13,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-22 23:57:13,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:13,029 INFO L225 Difference]: With dead ends: 70 [2020-12-22 23:57:13,030 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 23:57:13,033 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 [2020-12-22 23:57:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 23:57:13,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-22 23:57:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 23:57:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-12-22 23:57:13,080 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2020-12-22 23:57:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:13,080 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-12-22 23:57:13,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:57:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-12-22 23:57:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 23:57:13,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:13,082 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] [2020-12-22 23:57:13,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:57:13,083 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:13,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:13,084 INFO L82 PathProgramCache]: Analyzing trace with hash -212862985, now seen corresponding path program 1 times [2020-12-22 23:57:13,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:13,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623131393] [2020-12-22 23:57:13,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:57:13,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623131393] [2020-12-22 23:57:13,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875440211] [2020-12-22 23:57:13,206 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 [2020-12-22 23:57:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:13,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:57:13,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:57:13,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:57:13,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:57:13,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206550852] [2020-12-22 23:57:13,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:57:13,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:13,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:57:13,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:57:13,337 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 3 states. [2020-12-22 23:57:13,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:13,429 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2020-12-22 23:57:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:57:13,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-22 23:57:13,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:13,431 INFO L225 Difference]: With dead ends: 72 [2020-12-22 23:57:13,432 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 23:57:13,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:57:13,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 23:57:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-12-22 23:57:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 23:57:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-12-22 23:57:13,442 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 23 [2020-12-22 23:57:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:13,442 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-12-22 23:57:13,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:57:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-12-22 23:57:13,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 23:57:13,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:13,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:13,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:57:13,658 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:13,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:13,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1047765161, now seen corresponding path program 1 times [2020-12-22 23:57:13,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:13,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084882435] [2020-12-22 23:57:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:57:13,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084882435] [2020-12-22 23:57:13,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128904288] [2020-12-22 23:57:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:13,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:57:13,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:57:13,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:13,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:57:13,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692776281] [2020-12-22 23:57:13,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:57:13,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:13,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:57:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:57:13,997 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-12-22 23:57:14,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:14,034 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-12-22 23:57:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:57:14,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 23:57:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:14,036 INFO L225 Difference]: With dead ends: 78 [2020-12-22 23:57:14,036 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 23:57:14,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:57:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 23:57:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-22 23:57:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 23:57:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-12-22 23:57:14,045 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 37 [2020-12-22 23:57:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:14,045 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-12-22 23:57:14,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:57:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-12-22 23:57:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 23:57:14,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:14,047 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:14,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:14,262 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:14,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1173005543, now seen corresponding path program 2 times [2020-12-22 23:57:14,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:14,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232145211] [2020-12-22 23:57:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 23:57:14,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232145211] [2020-12-22 23:57:14,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731215482] [2020-12-22 23:57:14,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:14,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:57:14,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:14,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:57:14,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 23:57:14,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:14,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:57:14,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122601154] [2020-12-22 23:57:14,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:57:14,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:14,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:57:14,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:57:14,542 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2020-12-22 23:57:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:14,779 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2020-12-22 23:57:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:57:14,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-22 23:57:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:14,785 INFO L225 Difference]: With dead ends: 94 [2020-12-22 23:57:14,786 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 23:57:14,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:57:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 23:57:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-12-22 23:57:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 23:57:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-12-22 23:57:14,821 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 39 [2020-12-22 23:57:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:14,822 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-12-22 23:57:14,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:57:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-12-22 23:57:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 23:57:14,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:14,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:15,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:15,029 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:15,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:15,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1514760601, now seen corresponding path program 3 times [2020-12-22 23:57:15,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:15,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160199534] [2020-12-22 23:57:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 23:57:15,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160199534] [2020-12-22 23:57:15,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576054916] [2020-12-22 23:57:15,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:15,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:57:15,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:15,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:57:15,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 23:57:15,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:15,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 23:57:15,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097753037] [2020-12-22 23:57:15,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:57:15,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:15,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:57:15,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:57:15,383 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2020-12-22 23:57:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:15,632 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2020-12-22 23:57:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 23:57:15,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-12-22 23:57:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:15,660 INFO L225 Difference]: With dead ends: 129 [2020-12-22 23:57:15,660 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 23:57:15,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:57:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 23:57:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-12-22 23:57:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 23:57:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-12-22 23:57:15,682 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 53 [2020-12-22 23:57:15,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:15,682 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-12-22 23:57:15,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:57:15,683 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-12-22 23:57:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 23:57:15,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:15,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:15,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:15,893 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:15,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1887563127, now seen corresponding path program 4 times [2020-12-22 23:57:15,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:15,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443019690] [2020-12-22 23:57:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-22 23:57:16,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443019690] [2020-12-22 23:57:16,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99644923] [2020-12-22 23:57:16,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:16,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:57:16,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:16,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:57:16,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-22 23:57:16,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:16,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 23:57:16,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732672380] [2020-12-22 23:57:16,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:57:16,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:16,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:57:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:57:16,330 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 7 states. [2020-12-22 23:57:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:16,370 INFO L93 Difference]: Finished difference Result 138 states and 154 transitions. [2020-12-22 23:57:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:57:16,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-12-22 23:57:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:16,378 INFO L225 Difference]: With dead ends: 138 [2020-12-22 23:57:16,378 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 23:57:16,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:57:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 23:57:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-22 23:57:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 23:57:16,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-12-22 23:57:16,401 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 69 [2020-12-22 23:57:16,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:16,401 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-12-22 23:57:16,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:57:16,401 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-12-22 23:57:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 23:57:16,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:16,406 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:16,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 23:57:16,607 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:16,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:16,608 INFO L82 PathProgramCache]: Analyzing trace with hash -735797561, now seen corresponding path program 5 times [2020-12-22 23:57:16,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:16,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627033458] [2020-12-22 23:57:16,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-22 23:57:16,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627033458] [2020-12-22 23:57:16,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122378193] [2020-12-22 23:57:16,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:22,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 23:57:22,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:22,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:57:22,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 23:57:23,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:23,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-22 23:57:23,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749230616] [2020-12-22 23:57:23,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:57:23,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:23,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:57:23,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:57:23,043 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 11 states. [2020-12-22 23:57:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:23,331 INFO L93 Difference]: Finished difference Result 161 states and 184 transitions. [2020-12-22 23:57:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:57:23,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-12-22 23:57:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:23,333 INFO L225 Difference]: With dead ends: 161 [2020-12-22 23:57:23,333 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 23:57:23,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:57:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 23:57:23,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2020-12-22 23:57:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 23:57:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-12-22 23:57:23,347 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 71 [2020-12-22 23:57:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:23,347 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-12-22 23:57:23,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:57:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-12-22 23:57:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 23:57:23,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:23,349 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:23,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:23,557 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:23,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:23,558 INFO L82 PathProgramCache]: Analyzing trace with hash -557585481, now seen corresponding path program 6 times [2020-12-22 23:57:23,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:23,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40199435] [2020-12-22 23:57:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-22 23:57:23,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40199435] [2020-12-22 23:57:23,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155334984] [2020-12-22 23:57:23,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:24,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 23:57:24,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:24,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:57:24,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 23:57:24,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:24,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-22 23:57:24,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481722183] [2020-12-22 23:57:24,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:57:24,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:24,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:57:24,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:57:24,756 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 13 states. [2020-12-22 23:57:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:25,063 INFO L93 Difference]: Finished difference Result 191 states and 214 transitions. [2020-12-22 23:57:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:57:25,064 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 87 [2020-12-22 23:57:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:25,065 INFO L225 Difference]: With dead ends: 191 [2020-12-22 23:57:25,065 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 23:57:25,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:57:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 23:57:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2020-12-22 23:57:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 23:57:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2020-12-22 23:57:25,077 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 87 [2020-12-22 23:57:25,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:25,077 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2020-12-22 23:57:25,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:57:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2020-12-22 23:57:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 23:57:25,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:25,079 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:25,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:25,293 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:25,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1371150503, now seen corresponding path program 7 times [2020-12-22 23:57:25,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:25,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289829631] [2020-12-22 23:57:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-12-22 23:57:25,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289829631] [2020-12-22 23:57:25,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490840920] [2020-12-22 23:57:25,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:57:25,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-12-22 23:57:25,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:25,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 23:57:25,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718099068] [2020-12-22 23:57:25,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 23:57:25,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:25,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 23:57:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:57:25,733 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 10 states. [2020-12-22 23:57:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:25,774 INFO L93 Difference]: Finished difference Result 200 states and 216 transitions. [2020-12-22 23:57:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:57:25,775 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-12-22 23:57:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:25,776 INFO L225 Difference]: With dead ends: 200 [2020-12-22 23:57:25,776 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 23:57:25,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:57:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 23:57:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-12-22 23:57:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 23:57:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2020-12-22 23:57:25,787 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 103 [2020-12-22 23:57:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:25,788 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2020-12-22 23:57:25,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 23:57:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2020-12-22 23:57:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 23:57:25,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:25,790 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:25,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 23:57:26,000 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:26,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:26,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1580995941, now seen corresponding path program 8 times [2020-12-22 23:57:26,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:26,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506312931] [2020-12-22 23:57:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-12-22 23:57:26,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506312931] [2020-12-22 23:57:26,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766942680] [2020-12-22 23:57:26,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:26,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:57:26,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:26,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:57:26,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-12-22 23:57:26,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:26,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:57:26,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606710855] [2020-12-22 23:57:26,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:57:26,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:26,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:57:26,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:57:26,439 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 11 states. [2020-12-22 23:57:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:26,484 INFO L93 Difference]: Finished difference Result 202 states and 218 transitions. [2020-12-22 23:57:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:57:26,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 105 [2020-12-22 23:57:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:26,486 INFO L225 Difference]: With dead ends: 202 [2020-12-22 23:57:26,486 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 23:57:26,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:57:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 23:57:26,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-12-22 23:57:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 23:57:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-12-22 23:57:26,510 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 105 [2020-12-22 23:57:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:26,511 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-12-22 23:57:26,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:57:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-12-22 23:57:26,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 23:57:26,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:26,513 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:26,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:26,729 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:26,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1378998947, now seen corresponding path program 9 times [2020-12-22 23:57:26,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:26,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651069248] [2020-12-22 23:57:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-12-22 23:57:26,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651069248] [2020-12-22 23:57:26,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906481966] [2020-12-22 23:57:26,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:30,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 23:57:30,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:30,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:57:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-12-22 23:57:30,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:30,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2020-12-22 23:57:30,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856199318] [2020-12-22 23:57:30,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:57:30,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:30,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:57:30,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:57:30,423 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 17 states. [2020-12-22 23:57:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:30,767 INFO L93 Difference]: Finished difference Result 225 states and 248 transitions. [2020-12-22 23:57:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:57:30,768 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 107 [2020-12-22 23:57:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:30,770 INFO L225 Difference]: With dead ends: 225 [2020-12-22 23:57:30,770 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 23:57:30,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:57:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 23:57:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2020-12-22 23:57:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 23:57:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 134 transitions. [2020-12-22 23:57:30,778 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 134 transitions. Word has length 107 [2020-12-22 23:57:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:30,778 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 134 transitions. [2020-12-22 23:57:30,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:57:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 134 transitions. [2020-12-22 23:57:30,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 23:57:30,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:30,780 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:30,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:30,995 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:30,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1217621907, now seen corresponding path program 10 times [2020-12-22 23:57:30,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:30,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529017222] [2020-12-22 23:57:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-22 23:57:31,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529017222] [2020-12-22 23:57:31,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768904488] [2020-12-22 23:57:31,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:31,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:57:31,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:31,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:57:31,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-22 23:57:31,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:31,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 23:57:31,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807696999] [2020-12-22 23:57:31,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:57:31,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:31,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:57:31,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:57:31,461 INFO L87 Difference]: Start difference. First operand 126 states and 134 transitions. Second operand 13 states. [2020-12-22 23:57:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:31,506 INFO L93 Difference]: Finished difference Result 234 states and 250 transitions. [2020-12-22 23:57:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:57:31,507 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2020-12-22 23:57:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:31,508 INFO L225 Difference]: With dead ends: 234 [2020-12-22 23:57:31,508 INFO L226 Difference]: Without dead ends: 129 [2020-12-22 23:57:31,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:57:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-22 23:57:31,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-12-22 23:57:31,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-22 23:57:31,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2020-12-22 23:57:31,514 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 123 [2020-12-22 23:57:31,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:31,514 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2020-12-22 23:57:31,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:57:31,515 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2020-12-22 23:57:31,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 23:57:31,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:31,516 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:31,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:57:31,731 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:31,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:31,732 INFO L82 PathProgramCache]: Analyzing trace with hash -171597487, now seen corresponding path program 11 times [2020-12-22 23:57:31,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:31,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899487978] [2020-12-22 23:57:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-22 23:57:31,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899487978] [2020-12-22 23:57:31,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679715887] [2020-12-22 23:57:31,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true