/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_init8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:02:49,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:02:49,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:02:49,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:02:49,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:02:49,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:02:49,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:02:49,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:02:49,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:02:49,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:02:49,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:02:49,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:02:49,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:02:49,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:02:49,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:02:49,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:02:49,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:02:49,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:02:49,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:02:49,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:02:49,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:02:49,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:02:49,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:02:49,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:02:49,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:02:49,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 00:02:49,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 00:02:49,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 00:02:49,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 00:02:49,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 00:02:49,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 00:02:49,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 00:02:49,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 00:02:49,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:02:49,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:02:49,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:02:49,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:02:49,347 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:02:49,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:02:49,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:02:49,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:02:49,350 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:02:49,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:02:49,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:02:49,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:02:49,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:02:49,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:02:49,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:02:49,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:02:49,354 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:02:49,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:02:49,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:02:49,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:02:49,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:02:49,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:02:49,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:02:49,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:02:49,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:02:49,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:02:49,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:02:49,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:02:49,358 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:02:49,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:02:49,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:02:49,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:02:49,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:02:49,838 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:02:49,839 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:02:49,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init8_ground-2.i [2020-12-23 00:02:49,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd8c71d39/e4a1a08b4b9e4217b19d8ad85a0b128d/FLAGfe69dfad8 [2020-12-23 00:02:50,659 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:02:50,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init8_ground-2.i [2020-12-23 00:02:50,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd8c71d39/e4a1a08b4b9e4217b19d8ad85a0b128d/FLAGfe69dfad8 [2020-12-23 00:02:51,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd8c71d39/e4a1a08b4b9e4217b19d8ad85a0b128d [2020-12-23 00:02:51,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:02:51,034 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:02:51,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:02:51,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:02:51,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:02:51,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:02:51" (1/1) ... [2020-12-23 00:02:51,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49b22d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51, skipping insertion in model container [2020-12-23 00:02:51,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:02:51" (1/1) ... [2020-12-23 00:02:51,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:02:51,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:02:51,231 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init8_ground-2.i[816,829] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:02:51,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:02:51,268 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:02:51,282 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init8_ground-2.i[816,829] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:02:51,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:02:51,315 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:02:51,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51 WrapperNode [2020-12-23 00:02:51,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:02:51,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:02:51,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:02:51,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:02:51,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51" (1/1) ... [2020-12-23 00:02:51,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51" (1/1) ... [2020-12-23 00:02:51,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:02:51,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:02:51,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:02:51,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:02:51,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51" (1/1) ... [2020-12-23 00:02:51,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51" (1/1) ... [2020-12-23 00:02:51,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51" (1/1) ... [2020-12-23 00:02:51,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51" (1/1) ... [2020-12-23 00:02:51,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51" (1/1) ... [2020-12-23 00:02:51,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51" (1/1) ... [2020-12-23 00:02:51,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51" (1/1) ... [2020-12-23 00:02:51,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:02:51,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:02:51,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:02:51,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:02:51,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51" (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 [2020-12-23 00:02:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:02:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:02:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:02:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:02:51,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:02:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:02:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:02:51,858 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:02:51,858 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:02:51,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:02:51 BoogieIcfgContainer [2020-12-23 00:02:51,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:02:51,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:02:51,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:02:51,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:02:51,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:02:51" (1/3) ... [2020-12-23 00:02:51,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c08733d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:02:51, skipping insertion in model container [2020-12-23 00:02:51,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:02:51" (2/3) ... [2020-12-23 00:02:51,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c08733d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:02:51, skipping insertion in model container [2020-12-23 00:02:51,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:02:51" (3/3) ... [2020-12-23 00:02:51,873 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-2.i [2020-12-23 00:02:51,899 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:02:51,912 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:02:51,964 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:02:51,998 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:02:51,998 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:02:51,998 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:02:51,999 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:02:51,999 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:02:51,999 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:02:51,999 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:02:51,999 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:02:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-23 00:02:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:02:52,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:52,024 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] [2020-12-23 00:02:52,025 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash 730030661, now seen corresponding path program 1 times [2020-12-23 00:02:52,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:52,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395667710] [2020-12-23 00:02:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:02:52,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395667710] [2020-12-23 00:02:52,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:02:52,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:02:52,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605752839] [2020-12-23 00:02:52,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:02:52,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:52,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:02:52,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:02:52,397 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-12-23 00:02:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:52,548 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2020-12-23 00:02:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:02:52,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-23 00:02:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:52,562 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:02:52,562 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:02:52,565 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 [2020-12-23 00:02:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:02:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 00:02:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 00:02:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-12-23 00:02:52,610 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 21 [2020-12-23 00:02:52,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:52,611 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-12-23 00:02:52,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:02:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-12-23 00:02:52,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:02:52,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:52,613 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] [2020-12-23 00:02:52,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:02:52,613 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:52,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:52,614 INFO L82 PathProgramCache]: Analyzing trace with hash 798141757, now seen corresponding path program 1 times [2020-12-23 00:02:52,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:52,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135728763] [2020-12-23 00:02:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:02:52,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135728763] [2020-12-23 00:02:52,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633197303] [2020-12-23 00:02:52,696 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 [2020-12-23 00:02:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:52,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:02:52,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:02:52,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:52,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:02:52,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322178440] [2020-12-23 00:02:52,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:02:52,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:52,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:02:52,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:02:52,897 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 5 states. [2020-12-23 00:02:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:52,999 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2020-12-23 00:02:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:02:53,000 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-23 00:02:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:53,001 INFO L225 Difference]: With dead ends: 68 [2020-12-23 00:02:53,002 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 00:02:53,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:02:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 00:02:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 00:02:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 00:02:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-12-23 00:02:53,022 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 29 [2020-12-23 00:02:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:53,022 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-12-23 00:02:53,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:02:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-12-23 00:02:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:02:53,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:53,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:53,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:02:53,243 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:53,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1968111935, now seen corresponding path program 2 times [2020-12-23 00:02:53,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:53,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272028628] [2020-12-23 00:02:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 00:02:53,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272028628] [2020-12-23 00:02:53,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714169436] [2020-12-23 00:02:53,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:53,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:02:53,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:53,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:02:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 00:02:53,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:53,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:02:53,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098646091] [2020-12-23 00:02:53,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:02:53,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:53,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:02:53,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:02:53,551 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-12-23 00:02:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:53,689 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-12-23 00:02:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:02:53,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-12-23 00:02:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:53,691 INFO L225 Difference]: With dead ends: 83 [2020-12-23 00:02:53,691 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 00:02:53,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:02:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 00:02:53,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 00:02:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:02:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-12-23 00:02:53,701 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2020-12-23 00:02:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:53,701 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-12-23 00:02:53,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:02:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-12-23 00:02:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:02:53,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:53,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:53,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:53,918 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:53,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1959606083, now seen corresponding path program 3 times [2020-12-23 00:02:53,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:53,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807072312] [2020-12-23 00:02:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 00:02:54,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807072312] [2020-12-23 00:02:54,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060879568] [2020-12-23 00:02:54,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:54,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:02:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:54,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:02:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 00:02:54,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:54,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:02:54,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866043927] [2020-12-23 00:02:54,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:02:54,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:54,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:02:54,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:02:54,328 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 7 states. [2020-12-23 00:02:54,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:54,457 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2020-12-23 00:02:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:02:54,458 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-12-23 00:02:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:54,460 INFO L225 Difference]: With dead ends: 98 [2020-12-23 00:02:54,460 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 00:02:54,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:02:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 00:02:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 00:02:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:02:54,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-12-23 00:02:54,470 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 45 [2020-12-23 00:02:54,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:54,471 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-12-23 00:02:54,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:02:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-12-23 00:02:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 00:02:54,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:54,473 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:54,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:54,688 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:54,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:54,689 INFO L82 PathProgramCache]: Analyzing trace with hash -33175999, now seen corresponding path program 4 times [2020-12-23 00:02:54,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:54,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400133480] [2020-12-23 00:02:54,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:02:54,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400133480] [2020-12-23 00:02:54,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811252098] [2020-12-23 00:02:54,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:54,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:02:54,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:54,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:02:54,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:02:54,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:54,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:02:54,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109279115] [2020-12-23 00:02:54,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:02:54,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:54,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:02:54,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:02:54,959 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2020-12-23 00:02:55,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:55,105 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2020-12-23 00:02:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:02:55,106 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-12-23 00:02:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:55,107 INFO L225 Difference]: With dead ends: 113 [2020-12-23 00:02:55,107 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 00:02:55,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:02:55,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 00:02:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 00:02:55,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:02:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-12-23 00:02:55,118 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 53 [2020-12-23 00:02:55,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:55,119 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-12-23 00:02:55,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:02:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-12-23 00:02:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:02:55,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:55,121 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:55,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:55,336 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1705114563, now seen corresponding path program 5 times [2020-12-23 00:02:55,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:55,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892697669] [2020-12-23 00:02:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-23 00:02:55,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892697669] [2020-12-23 00:02:55,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445187466] [2020-12-23 00:02:55,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:10,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 00:03:10,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:03:10,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:03:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:03:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-23 00:03:10,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:03:10,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:03:10,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560077435] [2020-12-23 00:03:10,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:03:10,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:03:10,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:03:10,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:03:10,806 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 9 states. [2020-12-23 00:03:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:03:10,946 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2020-12-23 00:03:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:03:10,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-12-23 00:03:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:03:10,947 INFO L225 Difference]: With dead ends: 128 [2020-12-23 00:03:10,948 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 00:03:10,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:03:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 00:03:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-23 00:03:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:03:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-12-23 00:03:10,959 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 61 [2020-12-23 00:03:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:03:10,959 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-12-23 00:03:10,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:03:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-12-23 00:03:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:03:10,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:03:10,961 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:03:11,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:03:11,174 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:03:11,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:03:11,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1731269183, now seen corresponding path program 6 times [2020-12-23 00:03:11,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:03:11,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472756937] [2020-12-23 00:03:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:03:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:03:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-23 00:03:11,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472756937] [2020-12-23 00:03:11,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507281690] [2020-12-23 00:03:11,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:15,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 00:03:15,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:03:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:03:15,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:03:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-23 00:03:15,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:03:15,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:03:15,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495466225] [2020-12-23 00:03:15,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:03:15,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:03:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:03:15,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:03:15,600 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 10 states. [2020-12-23 00:03:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:03:15,736 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2020-12-23 00:03:15,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:03:15,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-12-23 00:03:15,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:03:15,738 INFO L225 Difference]: With dead ends: 143 [2020-12-23 00:03:15,738 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 00:03:15,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:03:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 00:03:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-23 00:03:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 00:03:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-12-23 00:03:15,749 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 69 [2020-12-23 00:03:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:03:15,749 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-12-23 00:03:15,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:03:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-12-23 00:03:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:03:15,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:03:15,751 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:03:15,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:15,953 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:03:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:03:15,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1733009475, now seen corresponding path program 7 times [2020-12-23 00:03:15,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:03:15,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297019143] [2020-12-23 00:03:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:03:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:03:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 00:03:16,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297019143] [2020-12-23 00:03:16,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168421993] [2020-12-23 00:03:16,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:03:16,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:03:16,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:03:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 00:03:16,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:03:16,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:03:16,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873991313] [2020-12-23 00:03:16,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:03:16,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:03:16,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:03:16,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:03:16,340 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 11 states. [2020-12-23 00:03:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:03:16,495 INFO L93 Difference]: Finished difference Result 158 states and 181 transitions. [2020-12-23 00:03:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:03:16,496 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2020-12-23 00:03:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:03:16,500 INFO L225 Difference]: With dead ends: 158 [2020-12-23 00:03:16,500 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 00:03:16,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:03:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 00:03:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-23 00:03:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:03:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-12-23 00:03:16,528 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 77 [2020-12-23 00:03:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:03:16,531 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-12-23 00:03:16,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:03:16,531 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-12-23 00:03:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 00:03:16,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:03:16,532 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:03:16,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:16,746 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:03:16,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:03:16,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1139569985, now seen corresponding path program 8 times [2020-12-23 00:03:16,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:03:16,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511594737] [2020-12-23 00:03:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:03:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:03:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-23 00:03:16,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511594737] [2020-12-23 00:03:16,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714961946] [2020-12-23 00:03:16,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:17,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:03:17,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:03:17,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:03:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:03:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-23 00:03:17,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:03:17,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:03:17,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310260439] [2020-12-23 00:03:17,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:03:17,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:03:17,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:03:17,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:03:17,171 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 12 states. [2020-12-23 00:03:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:03:17,327 INFO L93 Difference]: Finished difference Result 173 states and 196 transitions. [2020-12-23 00:03:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:03:17,328 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-12-23 00:03:17,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:03:17,329 INFO L225 Difference]: With dead ends: 173 [2020-12-23 00:03:17,329 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 00:03:17,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:03:17,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 00:03:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-23 00:03:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 00:03:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-12-23 00:03:17,358 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 85 [2020-12-23 00:03:17,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:03:17,358 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-12-23 00:03:17,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:03:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-12-23 00:03:17,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 00:03:17,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:03:17,360 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:03:17,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:03:17,582 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:03:17,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:03:17,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1607850813, now seen corresponding path program 9 times [2020-12-23 00:03:17,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:03:17,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844871056] [2020-12-23 00:03:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:03:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:03:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-12-23 00:03:17,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844871056] [2020-12-23 00:03:17,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259638402] [2020-12-23 00:03:17,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:55,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:03:55,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:03:55,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:03:55,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:03:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-12-23 00:03:56,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:03:56,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:03:56,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419581397] [2020-12-23 00:03:56,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:03:56,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:03:56,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:03:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:03:56,010 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 13 states. [2020-12-23 00:03:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:03:56,203 INFO L93 Difference]: Finished difference Result 188 states and 211 transitions. [2020-12-23 00:03:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:03:56,207 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 93 [2020-12-23 00:03:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:03:56,208 INFO L225 Difference]: With dead ends: 188 [2020-12-23 00:03:56,208 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:03:56,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:03:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:03:56,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-12-23 00:03:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:03:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-12-23 00:03:56,217 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 93 [2020-12-23 00:03:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:03:56,218 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-12-23 00:03:56,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:03:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-12-23 00:03:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:03:56,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:03:56,219 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:03:56,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:56,421 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:03:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:03:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1782471873, now seen corresponding path program 10 times [2020-12-23 00:03:56,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:03:56,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061245286] [2020-12-23 00:03:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:03:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:03:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-23 00:03:56,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061245286] [2020-12-23 00:03:56,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886765176] [2020-12-23 00:03:56,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:56,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:03:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:03:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:03:56,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:03:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-23 00:03:56,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:03:56,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:03:56,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85532617] [2020-12-23 00:03:56,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:03:56,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:03:56,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:03:56,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:03:56,817 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 14 states. [2020-12-23 00:03:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:03:57,020 INFO L93 Difference]: Finished difference Result 203 states and 226 transitions. [2020-12-23 00:03:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:03:57,021 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 101 [2020-12-23 00:03:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:03:57,022 INFO L225 Difference]: With dead ends: 203 [2020-12-23 00:03:57,022 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 00:03:57,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:03:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 00:03:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-23 00:03:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 00:03:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-12-23 00:03:57,031 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 101 [2020-12-23 00:03:57,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:03:57,031 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-12-23 00:03:57,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:03:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-12-23 00:03:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-23 00:03:57,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:03:57,033 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:03:57,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:03:57,247 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:03:57,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:03:57,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1734506173, now seen corresponding path program 11 times [2020-12-23 00:03:57,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:03:57,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294991803] [2020-12-23 00:03:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:03:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:03:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-12-23 00:03:57,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294991803] [2020-12-23 00:03:57,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65775475] [2020-12-23 00:03:57,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true