/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-crafted/xor1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:37:57,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:37:57,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:37:57,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:37:57,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:37:57,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:37:57,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:37:57,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:37:57,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:37:57,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:37:57,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:37:57,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:37:57,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:37:57,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:37:57,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:37:57,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:37:57,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:37:57,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:37:57,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:37:57,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:37:57,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:37:57,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:37:57,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:37:57,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:37:57,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:37:57,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:37:57,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:37:57,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:37:57,604 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:37:57,641 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:37:57,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:37:57,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:37:57,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:37:57,645 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:37:57,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:37:57,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:37:57,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:37:57,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:37:57,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:37:57,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:37:57,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:37:57,648 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:37:57,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:37:57,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:37:57,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:37:57,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:37:57,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:37:57,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:37:57,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:37:57,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:37:57,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:37:57,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:37:57,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:37:57,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:37:57,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:37:58,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:37:58,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:37:58,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:37:58,185 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:37:58,186 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:37:58,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor1.i [2021-01-06 10:37:58,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fb3e35bff/c90b20c191e4423b816f59bb541e647c/FLAG3f4261713 [2021-01-06 10:37:58,951 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:37:58,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/xor1.i [2021-01-06 10:37:58,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fb3e35bff/c90b20c191e4423b816f59bb541e647c/FLAG3f4261713 [2021-01-06 10:37:59,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fb3e35bff/c90b20c191e4423b816f59bb541e647c [2021-01-06 10:37:59,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:37:59,336 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:37:59,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:37:59,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:37:59,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:37:59,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:37:59" (1/1) ... [2021-01-06 10:37:59,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a1610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59, skipping insertion in model container [2021-01-06 10:37:59,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:37:59" (1/1) ... [2021-01-06 10:37:59,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:37:59,378 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~res~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~res~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[99]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:37:59,616 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-crafted/xor1.i[1285,1298] [2021-01-06 10:37:59,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:37:59,629 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~res~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~res~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[396],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:37:59,657 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-crafted/xor1.i[1285,1298] [2021-01-06 10:37:59,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:37:59,677 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:37:59,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59 WrapperNode [2021-01-06 10:37:59,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:37:59,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:37:59,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:37:59,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:37:59,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59" (1/1) ... [2021-01-06 10:37:59,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59" (1/1) ... [2021-01-06 10:37:59,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:37:59,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:37:59,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:37:59,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:37:59,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59" (1/1) ... [2021-01-06 10:37:59,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59" (1/1) ... [2021-01-06 10:37:59,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59" (1/1) ... [2021-01-06 10:37:59,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59" (1/1) ... [2021-01-06 10:37:59,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59" (1/1) ... [2021-01-06 10:37:59,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59" (1/1) ... [2021-01-06 10:37:59,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59" (1/1) ... [2021-01-06 10:37:59,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:37:59,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:37:59,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:37:59,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:37:59,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:37:59,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:37:59,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:37:59,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:37:59,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:37:59,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:37:59,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:37:59,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:38:00,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:38:00,496 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 10:38:00,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:38:00 BoogieIcfgContainer [2021-01-06 10:38:00,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:38:00,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:38:00,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:38:00,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:38:00,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:37:59" (1/3) ... [2021-01-06 10:38:00,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2421e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:38:00, skipping insertion in model container [2021-01-06 10:38:00,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:59" (2/3) ... [2021-01-06 10:38:00,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2421e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:38:00, skipping insertion in model container [2021-01-06 10:38:00,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:38:00" (3/3) ... [2021-01-06 10:38:00,521 INFO L111 eAbstractionObserver]: Analyzing ICFG xor1.i [2021-01-06 10:38:00,541 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:38:00,551 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:38:00,580 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:38:00,625 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:38:00,627 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:38:00,627 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:38:00,628 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:38:00,628 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:38:00,628 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:38:00,628 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:38:00,628 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:38:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-01-06 10:38:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:38:00,657 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:00,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:00,658 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:00,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-01-06 10:38:00,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:00,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518937419] [2021-01-06 10:38:00,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:38:01,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518937419] [2021-01-06 10:38:01,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:38:01,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:38:01,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644199261] [2021-01-06 10:38:01,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:38:01,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:38:01,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:38:01,035 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2021-01-06 10:38:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:01,108 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 10:38:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:38:01,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:38:01,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:01,122 INFO L225 Difference]: With dead ends: 52 [2021-01-06 10:38:01,123 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 10:38:01,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:38:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 10:38:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 10:38:01,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:38:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 10:38:01,165 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-01-06 10:38:01,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:01,166 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 10:38:01,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:38:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 10:38:01,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:38:01,167 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:01,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:01,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:38:01,168 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:01,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:01,169 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-01-06 10:38:01,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:01,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230493953] [2021-01-06 10:38:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:38:01,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230493953] [2021-01-06 10:38:01,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307699760] [2021-01-06 10:38:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:01,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:38:01,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:38:01,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:38:01,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:38:01,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128401861] [2021-01-06 10:38:01,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:38:01,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:01,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:38:01,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:38:01,436 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2021-01-06 10:38:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:01,490 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 10:38:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:38:01,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:38:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:01,492 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:38:01,493 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:38:01,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:38:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:38:01,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-01-06 10:38:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:38:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-01-06 10:38:01,500 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-01-06 10:38:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:01,501 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-01-06 10:38:01,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:38:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-01-06 10:38:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:38:01,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:01,502 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] [2021-01-06 10:38:01,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:38:01,717 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:01,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-01-06 10:38:01,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:01,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740645260] [2021-01-06 10:38:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:38:01,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740645260] [2021-01-06 10:38:01,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465002429] [2021-01-06 10:38:01,797 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 [2021-01-06 10:38:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:01,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:38:01,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:38:01,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:38:01,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:38:01,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14058967] [2021-01-06 10:38:01,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:38:01,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:01,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:38:01,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:38:01,971 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2021-01-06 10:38:01,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:01,993 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-01-06 10:38:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:38:01,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-01-06 10:38:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:01,995 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:38:01,995 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:38:01,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:38:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:38:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-01-06 10:38:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:38:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-06 10:38:02,002 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-01-06 10:38:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:02,003 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-06 10:38:02,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:38:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-06 10:38:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:38:02,004 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:02,004 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] [2021-01-06 10:38:02,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:02,218 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:02,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:02,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-01-06 10:38:02,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:02,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191772802] [2021-01-06 10:38:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:38:02,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191772802] [2021-01-06 10:38:02,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967303421] [2021-01-06 10:38:02,293 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:02,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:38:02,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:38:02,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:02,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:38:02,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791847600] [2021-01-06 10:38:02,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:38:02,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:02,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:38:02,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:38:02,526 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2021-01-06 10:38:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:02,555 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-01-06 10:38:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:38:02,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2021-01-06 10:38:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:02,557 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:38:02,557 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:38:02,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:38:02,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:38:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 10:38:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:38:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 10:38:02,564 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2021-01-06 10:38:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:02,564 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 10:38:02,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:38:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 10:38:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:38:02,565 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:02,566 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] [2021-01-06 10:38:02,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:02,779 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:02,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2021-01-06 10:38:02,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:02,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879893659] [2021-01-06 10:38:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:38:02,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879893659] [2021-01-06 10:38:02,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318530932] [2021-01-06 10:38:02,856 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:02,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:02,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:02,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:38:02,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:38:03,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:03,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:38:03,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849089581] [2021-01-06 10:38:03,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:38:03,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:03,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:38:03,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:38:03,048 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2021-01-06 10:38:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:03,170 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-01-06 10:38:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:38:03,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-01-06 10:38:03,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:03,172 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:38:03,172 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 10:38:03,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:38:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 10:38:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-01-06 10:38:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:38:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 10:38:03,180 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-01-06 10:38:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:03,180 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 10:38:03,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:38:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 10:38:03,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 10:38:03,182 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:03,182 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 10:38:03,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:03,397 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:03,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2021-01-06 10:38:03,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:03,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966918758] [2021-01-06 10:38:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:38:03,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966918758] [2021-01-06 10:38:03,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154028848] [2021-01-06 10:38:03,571 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:03,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:38:03,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:03,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:38:03,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:38:03,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:03,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:38:03,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205600897] [2021-01-06 10:38:03,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:38:03,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:03,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:38:03,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:38:03,845 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 6 states. [2021-01-06 10:38:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:03,957 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-01-06 10:38:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:38:03,958 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2021-01-06 10:38:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:03,959 INFO L225 Difference]: With dead ends: 72 [2021-01-06 10:38:03,959 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 10:38:03,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:38:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 10:38:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-01-06 10:38:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:38:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-01-06 10:38:03,967 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2021-01-06 10:38:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:03,967 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-01-06 10:38:03,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:38:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-01-06 10:38:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 10:38:03,968 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:03,969 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:04,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:38:04,179 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:04,180 INFO L82 PathProgramCache]: Analyzing trace with hash -733217450, now seen corresponding path program 4 times [2021-01-06 10:38:04,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:04,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679830517] [2021-01-06 10:38:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:38:04,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679830517] [2021-01-06 10:38:04,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020838982] [2021-01-06 10:38:04,290 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:04,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:04,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:04,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:38:04,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 10:38:04,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:04,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-01-06 10:38:04,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711604300] [2021-01-06 10:38:04,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:38:04,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:04,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:38:04,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:38:04,485 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2021-01-06 10:38:04,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:04,609 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-01-06 10:38:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:38:04,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2021-01-06 10:38:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:04,611 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:38:04,611 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 10:38:04,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:38:04,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 10:38:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-01-06 10:38:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:38:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-01-06 10:38:04,619 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2021-01-06 10:38:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:04,619 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-01-06 10:38:04,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:38:04,619 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-01-06 10:38:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:38:04,621 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:04,621 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:04,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:04,836 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash 183219474, now seen corresponding path program 5 times [2021-01-06 10:38:04,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:04,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704705388] [2021-01-06 10:38:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 10:38:04,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704705388] [2021-01-06 10:38:04,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033113473] [2021-01-06 10:38:04,990 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:05,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:38:05,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:05,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:38:05,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:38:05,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:05,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-01-06 10:38:05,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404074230] [2021-01-06 10:38:05,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:38:05,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:05,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:38:05,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:38:05,208 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 11 states. [2021-01-06 10:38:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:05,363 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-01-06 10:38:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:38:05,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2021-01-06 10:38:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:05,365 INFO L225 Difference]: With dead ends: 107 [2021-01-06 10:38:05,365 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 10:38:05,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:38:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 10:38:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2021-01-06 10:38:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 10:38:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-01-06 10:38:05,373 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 51 [2021-01-06 10:38:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:05,373 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-01-06 10:38:05,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:38:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-01-06 10:38:05,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:38:05,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:05,375 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:05,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:05,590 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:05,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:05,591 INFO L82 PathProgramCache]: Analyzing trace with hash -820989490, now seen corresponding path program 6 times [2021-01-06 10:38:05,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:05,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337742716] [2021-01-06 10:38:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-01-06 10:38:05,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337742716] [2021-01-06 10:38:05,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902236256] [2021-01-06 10:38:05,682 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:05,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:38:05,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:05,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:38:05,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:05,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:05,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 10:38:05,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318372638] [2021-01-06 10:38:05,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:38:05,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:05,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:38:05,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:38:05,930 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2021-01-06 10:38:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:05,985 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-01-06 10:38:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:38:05,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2021-01-06 10:38:05,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:05,986 INFO L225 Difference]: With dead ends: 115 [2021-01-06 10:38:05,986 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:38:05,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:38:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:38:06,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-01-06 10:38:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:38:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-01-06 10:38:06,013 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 59 [2021-01-06 10:38:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:06,013 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-01-06 10:38:06,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:38:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-01-06 10:38:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:38:06,017 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:06,019 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:06,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:38:06,220 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:06,221 INFO L82 PathProgramCache]: Analyzing trace with hash -164647158, now seen corresponding path program 7 times [2021-01-06 10:38:06,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:06,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830980801] [2021-01-06 10:38:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 10:38:06,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830980801] [2021-01-06 10:38:06,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464388350] [2021-01-06 10:38:06,325 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:38:06,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 10:38:06,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:06,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:38:06,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611228195] [2021-01-06 10:38:06,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:38:06,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:06,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:38:06,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:38:06,519 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 9 states. [2021-01-06 10:38:06,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:06,561 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-01-06 10:38:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:38:06,561 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2021-01-06 10:38:06,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:06,563 INFO L225 Difference]: With dead ends: 118 [2021-01-06 10:38:06,563 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 10:38:06,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:38:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 10:38:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-01-06 10:38:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:38:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-01-06 10:38:06,586 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2021-01-06 10:38:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:06,586 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-01-06 10:38:06,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:38:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-01-06 10:38:06,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:38:06,588 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:06,588 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:06,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:06,806 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:06,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:06,807 INFO L82 PathProgramCache]: Analyzing trace with hash 751550920, now seen corresponding path program 8 times [2021-01-06 10:38:06,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:06,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195663596] [2021-01-06 10:38:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 10:38:06,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195663596] [2021-01-06 10:38:06,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719942460] [2021-01-06 10:38:06,912 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:07,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:07,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:07,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:38:07,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 10:38:07,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:07,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:38:07,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017757040] [2021-01-06 10:38:07,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:38:07,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:07,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:38:07,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:38:07,151 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 10 states. [2021-01-06 10:38:07,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:07,184 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-01-06 10:38:07,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:38:07,184 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2021-01-06 10:38:07,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:07,185 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:38:07,185 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 10:38:07,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:38:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 10:38:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-01-06 10:38:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:38:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-01-06 10:38:07,191 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 65 [2021-01-06 10:38:07,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:07,192 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-01-06 10:38:07,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:38:07,192 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-01-06 10:38:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 10:38:07,193 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:07,193 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:07,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:07,408 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:07,409 INFO L82 PathProgramCache]: Analyzing trace with hash 749608198, now seen corresponding path program 9 times [2021-01-06 10:38:07,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:07,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368764686] [2021-01-06 10:38:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 10:38:07,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368764686] [2021-01-06 10:38:07,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794208627] [2021-01-06 10:38:07,575 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 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 [2021-01-06 10:38:07,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:38:07,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:07,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:38:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-01-06 10:38:07,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:07,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-01-06 10:38:07,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705674348] [2021-01-06 10:38:07,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:38:07,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:07,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:38:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:38:07,927 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 14 states. [2021-01-06 10:38:07,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:07,995 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-01-06 10:38:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:38:07,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2021-01-06 10:38:07,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:07,997 INFO L225 Difference]: With dead ends: 125 [2021-01-06 10:38:07,997 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 10:38:07,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:38:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 10:38:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-01-06 10:38:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:38:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-01-06 10:38:08,003 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 67 [2021-01-06 10:38:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:08,003 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-01-06 10:38:08,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:38:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-01-06 10:38:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:38:08,004 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:08,004 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:08,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:38:08,220 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:08,221 INFO L82 PathProgramCache]: Analyzing trace with hash 258477634, now seen corresponding path program 10 times [2021-01-06 10:38:08,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:08,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289939247] [2021-01-06 10:38:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:08,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289939247] [2021-01-06 10:38:08,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31082101] [2021-01-06 10:38:08,338 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 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 [2021-01-06 10:38:08,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:08,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:08,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:38:08,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:08,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:08,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:38:08,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531128449] [2021-01-06 10:38:08,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:38:08,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:08,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:38:08,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:38:08,533 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 12 states. [2021-01-06 10:38:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:08,578 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-01-06 10:38:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:38:08,579 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2021-01-06 10:38:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:08,580 INFO L225 Difference]: With dead ends: 128 [2021-01-06 10:38:08,581 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:38:08,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:38:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:38:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-01-06 10:38:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 10:38:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-01-06 10:38:08,590 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2021-01-06 10:38:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:08,591 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-01-06 10:38:08,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:38:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-01-06 10:38:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:38:08,592 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:08,592 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:08,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:38:08,807 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:08,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:08,808 INFO L82 PathProgramCache]: Analyzing trace with hash -996375808, now seen corresponding path program 11 times [2021-01-06 10:38:08,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:08,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227672184] [2021-01-06 10:38:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:08,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227672184] [2021-01-06 10:38:08,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412916247] [2021-01-06 10:38:08,958 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:09,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 10:38:09,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:09,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:38:09,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:09,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:09,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:38:09,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280176357] [2021-01-06 10:38:09,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:38:09,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:09,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:38:09,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:38:09,278 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 13 states. [2021-01-06 10:38:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:09,316 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-01-06 10:38:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:38:09,317 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 73 [2021-01-06 10:38:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:09,318 INFO L225 Difference]: With dead ends: 130 [2021-01-06 10:38:09,318 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 10:38:09,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:38:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 10:38:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-01-06 10:38:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 10:38:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-01-06 10:38:09,322 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 73 [2021-01-06 10:38:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:09,322 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-01-06 10:38:09,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:38:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-01-06 10:38:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:38:09,323 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:09,323 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:09,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:38:09,537 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:09,538 INFO L82 PathProgramCache]: Analyzing trace with hash -24723394, now seen corresponding path program 12 times [2021-01-06 10:38:09,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:09,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337072301] [2021-01-06 10:38:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:09,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337072301] [2021-01-06 10:38:09,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703503374] [2021-01-06 10:38:09,685 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:10,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:38:10,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:10,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:38:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-01-06 10:38:10,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:10,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-01-06 10:38:10,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085714595] [2021-01-06 10:38:10,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:38:10,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:38:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:38:10,237 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 18 states. [2021-01-06 10:38:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:10,332 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-01-06 10:38:10,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:38:10,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2021-01-06 10:38:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:10,333 INFO L225 Difference]: With dead ends: 135 [2021-01-06 10:38:10,333 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 10:38:10,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:38:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 10:38:10,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-01-06 10:38:10,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 10:38:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-01-06 10:38:10,343 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 75 [2021-01-06 10:38:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:10,343 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-01-06 10:38:10,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:38:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-01-06 10:38:10,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:38:10,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:10,345 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 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] [2021-01-06 10:38:10,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:10,556 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash 485205370, now seen corresponding path program 13 times [2021-01-06 10:38:10,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:10,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687046364] [2021-01-06 10:38:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:10,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687046364] [2021-01-06 10:38:10,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836746709] [2021-01-06 10:38:10,726 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:10,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:38:10,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:10,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:10,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:38:10,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19779821] [2021-01-06 10:38:10,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:38:10,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:10,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:38:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:38:10,913 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 15 states. [2021-01-06 10:38:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:10,982 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2021-01-06 10:38:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:38:10,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2021-01-06 10:38:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:10,983 INFO L225 Difference]: With dead ends: 138 [2021-01-06 10:38:10,983 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 10:38:10,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:38:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 10:38:10,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-01-06 10:38:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 10:38:10,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-01-06 10:38:10,990 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 79 [2021-01-06 10:38:10,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:10,990 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-01-06 10:38:10,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:38:10,990 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-01-06 10:38:10,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:38:10,991 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:10,991 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 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] [2021-01-06 10:38:11,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:38:11,201 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:11,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:11,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1798732856, now seen corresponding path program 14 times [2021-01-06 10:38:11,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:11,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115199546] [2021-01-06 10:38:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:11,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115199546] [2021-01-06 10:38:11,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874451248] [2021-01-06 10:38:11,372 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:11,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:11,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:11,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:38:11,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:11,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:11,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:38:11,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517400954] [2021-01-06 10:38:11,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:38:11,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:11,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:38:11,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:38:11,572 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 16 states. [2021-01-06 10:38:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:11,621 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2021-01-06 10:38:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:38:11,622 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2021-01-06 10:38:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:11,623 INFO L225 Difference]: With dead ends: 140 [2021-01-06 10:38:11,623 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 10:38:11,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:38:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 10:38:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-01-06 10:38:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 10:38:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-01-06 10:38:11,628 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 81 [2021-01-06 10:38:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:11,628 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-01-06 10:38:11,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:38:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-01-06 10:38:11,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 10:38:11,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:11,629 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 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] [2021-01-06 10:38:11,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:38:11,839 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:11,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:11,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 15 times [2021-01-06 10:38:11,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:11,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524584273] [2021-01-06 10:38:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:12,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524584273] [2021-01-06 10:38:12,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236219909] [2021-01-06 10:38:12,068 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:12,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:38:12,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:38:12,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-01-06 10:38:12,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:12,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2021-01-06 10:38:12,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055773475] [2021-01-06 10:38:12,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:38:12,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:12,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:38:12,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:12,530 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 22 states. [2021-01-06 10:38:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:12,718 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2021-01-06 10:38:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:38:12,719 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 83 [2021-01-06 10:38:12,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:12,720 INFO L225 Difference]: With dead ends: 151 [2021-01-06 10:38:12,720 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 10:38:12,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 10:38:12,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-01-06 10:38:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:38:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-01-06 10:38:12,726 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2021-01-06 10:38:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:12,726 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-01-06 10:38:12,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:38:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-01-06 10:38:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:38:12,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:12,727 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:12,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:38:12,942 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:12,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2009408050, now seen corresponding path program 16 times [2021-01-06 10:38:12,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:12,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162056767] [2021-01-06 10:38:12,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:38:13,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162056767] [2021-01-06 10:38:13,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591246603] [2021-01-06 10:38:13,195 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:13,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:13,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:38:13,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:38:13,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:13,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 10:38:13,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015574267] [2021-01-06 10:38:13,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:38:13,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:13,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:38:13,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:38:13,478 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 18 states. [2021-01-06 10:38:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:13,537 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2021-01-06 10:38:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:38:13,538 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2021-01-06 10:38:13,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:13,539 INFO L225 Difference]: With dead ends: 156 [2021-01-06 10:38:13,539 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 10:38:13,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:38:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 10:38:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-01-06 10:38:13,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 10:38:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-01-06 10:38:13,543 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 91 [2021-01-06 10:38:13,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:13,544 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-01-06 10:38:13,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:38:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-01-06 10:38:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 10:38:13,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:13,545 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:13,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:13,758 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:13,759 INFO L82 PathProgramCache]: Analyzing trace with hash 868076528, now seen corresponding path program 17 times [2021-01-06 10:38:13,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:13,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386832110] [2021-01-06 10:38:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:38:13,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386832110] [2021-01-06 10:38:13,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270144590] [2021-01-06 10:38:13,985 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:14,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-01-06 10:38:14,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:14,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:38:14,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:38:15,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:15,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2021-01-06 10:38:15,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799435872] [2021-01-06 10:38:15,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:38:15,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:15,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:38:15,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:15,069 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 25 states. [2021-01-06 10:38:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:15,234 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2021-01-06 10:38:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:38:15,235 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 93 [2021-01-06 10:38:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:15,236 INFO L225 Difference]: With dead ends: 167 [2021-01-06 10:38:15,236 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 10:38:15,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 10:38:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2021-01-06 10:38:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 10:38:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-01-06 10:38:15,241 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 93 [2021-01-06 10:38:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:15,241 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-01-06 10:38:15,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:38:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-01-06 10:38:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:38:15,242 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:15,243 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:15,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:15,456 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:15,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash -975128148, now seen corresponding path program 18 times [2021-01-06 10:38:15,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:15,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913971860] [2021-01-06 10:38:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-01-06 10:38:15,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913971860] [2021-01-06 10:38:15,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885476692] [2021-01-06 10:38:15,699 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:16,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 10:38:16,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:38:16,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-01-06 10:38:16,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:16,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2021-01-06 10:38:16,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529849205] [2021-01-06 10:38:16,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:38:16,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:38:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:16,974 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 25 states. [2021-01-06 10:38:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:17,088 INFO L93 Difference]: Finished difference Result 175 states and 184 transitions. [2021-01-06 10:38:17,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:38:17,089 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2021-01-06 10:38:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:17,091 INFO L225 Difference]: With dead ends: 175 [2021-01-06 10:38:17,091 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:38:17,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:38:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-01-06 10:38:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 10:38:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-01-06 10:38:17,098 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 101 [2021-01-06 10:38:17,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:17,099 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-01-06 10:38:17,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:38:17,099 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-01-06 10:38:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 10:38:17,100 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:17,100 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:17,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:38:17,315 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:17,316 INFO L82 PathProgramCache]: Analyzing trace with hash -470849048, now seen corresponding path program 19 times [2021-01-06 10:38:17,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:17,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080226862] [2021-01-06 10:38:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:38:17,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080226862] [2021-01-06 10:38:17,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751764602] [2021-01-06 10:38:17,582 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:17,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:38:17,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:38:17,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:17,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 10:38:17,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253724782] [2021-01-06 10:38:17,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:38:17,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:38:17,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:38:17,837 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 21 states. [2021-01-06 10:38:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:17,898 INFO L93 Difference]: Finished difference Result 178 states and 186 transitions. [2021-01-06 10:38:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:38:17,899 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2021-01-06 10:38:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:17,899 INFO L225 Difference]: With dead ends: 178 [2021-01-06 10:38:17,900 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 10:38:17,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:38:17,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 10:38:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-01-06 10:38:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:38:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-01-06 10:38:17,905 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 105 [2021-01-06 10:38:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:17,905 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-01-06 10:38:17,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:38:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-01-06 10:38:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 10:38:17,906 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:17,906 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:18,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:38:18,120 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 20 times [2021-01-06 10:38:18,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:18,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960622728] [2021-01-06 10:38:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:38:18,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960622728] [2021-01-06 10:38:18,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459474233] [2021-01-06 10:38:18,412 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:18,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:18,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:38:18,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:38:18,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:18,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:38:18,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129148827] [2021-01-06 10:38:18,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:38:18,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:18,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:38:18,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:18,687 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 22 states. [2021-01-06 10:38:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:18,756 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2021-01-06 10:38:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:38:18,757 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2021-01-06 10:38:18,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:18,757 INFO L225 Difference]: With dead ends: 180 [2021-01-06 10:38:18,758 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 10:38:18,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 10:38:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-01-06 10:38:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 10:38:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-01-06 10:38:18,762 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2021-01-06 10:38:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:18,762 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-01-06 10:38:18,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:38:18,763 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-01-06 10:38:18,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-06 10:38:18,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:18,764 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:18,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:18,969 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1518428956, now seen corresponding path program 21 times [2021-01-06 10:38:18,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:18,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925787600] [2021-01-06 10:38:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:38:19,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925787600] [2021-01-06 10:38:19,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146781061] [2021-01-06 10:38:19,268 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:19,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 10:38:19,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:19,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:38:19,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-01-06 10:38:19,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:19,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2021-01-06 10:38:19,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606693216] [2021-01-06 10:38:19,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:38:19,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:19,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:38:19,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:38:19,904 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 29 states. [2021-01-06 10:38:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:20,067 INFO L93 Difference]: Finished difference Result 185 states and 194 transitions. [2021-01-06 10:38:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:38:20,069 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2021-01-06 10:38:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:20,070 INFO L225 Difference]: With dead ends: 185 [2021-01-06 10:38:20,070 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 10:38:20,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:38:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 10:38:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2021-01-06 10:38:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 10:38:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2021-01-06 10:38:20,076 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 109 [2021-01-06 10:38:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:20,077 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2021-01-06 10:38:20,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:38:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2021-01-06 10:38:20,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-01-06 10:38:20,078 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:20,078 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 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] [2021-01-06 10:38:20,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:38:20,292 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:20,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 22 times [2021-01-06 10:38:20,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:20,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974432585] [2021-01-06 10:38:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:38:20,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974432585] [2021-01-06 10:38:20,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457513318] [2021-01-06 10:38:20,637 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:20,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:20,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:20,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:38:20,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:38:20,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:20,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 10:38:20,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182101441] [2021-01-06 10:38:20,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:38:20,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:20,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:38:20,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:38:20,898 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2021-01-06 10:38:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:20,973 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2021-01-06 10:38:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 10:38:20,973 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2021-01-06 10:38:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:20,974 INFO L225 Difference]: With dead ends: 188 [2021-01-06 10:38:20,975 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 10:38:20,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:38:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 10:38:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-01-06 10:38:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 10:38:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-01-06 10:38:20,981 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2021-01-06 10:38:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:20,981 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-01-06 10:38:20,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:38:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-01-06 10:38:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 10:38:20,982 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:20,982 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 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] [2021-01-06 10:38:21,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:21,196 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:21,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 23 times [2021-01-06 10:38:21,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:21,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685334535] [2021-01-06 10:38:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:38:21,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685334535] [2021-01-06 10:38:21,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356323288] [2021-01-06 10:38:21,583 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:27,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-01-06 10:38:27,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:27,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:38:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:38:27,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:27,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 10:38:27,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222988120] [2021-01-06 10:38:27,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:38:27,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:27,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:38:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:27,497 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 25 states. [2021-01-06 10:38:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:27,581 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2021-01-06 10:38:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:38:27,582 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2021-01-06 10:38:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:27,583 INFO L225 Difference]: With dead ends: 190 [2021-01-06 10:38:27,583 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 10:38:27,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 10:38:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-01-06 10:38:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 10:38:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-01-06 10:38:27,589 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 115 [2021-01-06 10:38:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:27,589 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-01-06 10:38:27,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:38:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-01-06 10:38:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 10:38:27,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:27,590 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 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] [2021-01-06 10:38:27,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:38:27,804 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1102432228, now seen corresponding path program 24 times [2021-01-06 10:38:27,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:27,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038892766] [2021-01-06 10:38:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:38:28,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038892766] [2021-01-06 10:38:28,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128026923] [2021-01-06 10:38:28,204 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:30,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 10:38:30,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:30,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:38:30,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2021-01-06 10:38:30,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:30,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2021-01-06 10:38:30,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779104560] [2021-01-06 10:38:30,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:38:30,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:30,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:38:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:38:30,938 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 33 states. [2021-01-06 10:38:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:31,235 INFO L93 Difference]: Finished difference Result 201 states and 212 transitions. [2021-01-06 10:38:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:38:31,236 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 117 [2021-01-06 10:38:31,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:31,237 INFO L225 Difference]: With dead ends: 201 [2021-01-06 10:38:31,237 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 10:38:31,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:38:31,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 10:38:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-01-06 10:38:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 10:38:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-01-06 10:38:31,243 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 117 [2021-01-06 10:38:31,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:31,243 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-01-06 10:38:31,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:38:31,243 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-01-06 10:38:31,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-01-06 10:38:31,244 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:31,245 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:31,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:38:31,459 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:31,459 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 25 times [2021-01-06 10:38:31,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:31,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910092749] [2021-01-06 10:38:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:31,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910092749] [2021-01-06 10:38:31,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680625329] [2021-01-06 10:38:31,891 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:32,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:38:32,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:32,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:32,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 10:38:32,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323655853] [2021-01-06 10:38:32,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:38:32,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:32,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:38:32,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:38:32,142 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 27 states. [2021-01-06 10:38:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:32,242 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2021-01-06 10:38:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:38:32,242 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2021-01-06 10:38:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:32,243 INFO L225 Difference]: With dead ends: 206 [2021-01-06 10:38:32,243 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 10:38:32,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:38:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 10:38:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-01-06 10:38:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 10:38:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2021-01-06 10:38:32,248 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2021-01-06 10:38:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:32,249 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2021-01-06 10:38:32,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:38:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2021-01-06 10:38:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-01-06 10:38:32,250 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:32,250 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:32,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:38:32,464 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:32,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 26 times [2021-01-06 10:38:32,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:32,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055405183] [2021-01-06 10:38:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:32,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055405183] [2021-01-06 10:38:32,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745463501] [2021-01-06 10:38:32,935 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:33,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:33,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:33,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:38:33,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:33,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:33,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:38:33,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078783440] [2021-01-06 10:38:33,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:38:33,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:33,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:38:33,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:38:33,184 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2021-01-06 10:38:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:33,279 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2021-01-06 10:38:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:38:33,280 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2021-01-06 10:38:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:33,281 INFO L225 Difference]: With dead ends: 208 [2021-01-06 10:38:33,281 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 10:38:33,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:38:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 10:38:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-01-06 10:38:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 10:38:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2021-01-06 10:38:33,287 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2021-01-06 10:38:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:33,287 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2021-01-06 10:38:33,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:38:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2021-01-06 10:38:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-01-06 10:38:33,288 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:33,288 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:33,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:38:33,502 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:33,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 27 times [2021-01-06 10:38:33,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:33,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360550954] [2021-01-06 10:38:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:34,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360550954] [2021-01-06 10:38:34,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533598520] [2021-01-06 10:38:34,051 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:34,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:38:34,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:38:34,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2021-01-06 10:38:34,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:34,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2021-01-06 10:38:34,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605606835] [2021-01-06 10:38:34,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:38:34,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:34,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:38:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:38:34,781 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 36 states. [2021-01-06 10:38:34,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:34,980 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2021-01-06 10:38:34,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:38:34,985 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 129 [2021-01-06 10:38:34,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:34,987 INFO L225 Difference]: With dead ends: 213 [2021-01-06 10:38:34,987 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 10:38:34,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:38:34,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 10:38:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-01-06 10:38:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 10:38:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2021-01-06 10:38:34,993 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 129 [2021-01-06 10:38:34,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:34,993 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2021-01-06 10:38:34,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:38:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2021-01-06 10:38:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-01-06 10:38:34,994 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:34,994 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 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] [2021-01-06 10:38:35,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:35,208 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:35,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:35,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2138537200, now seen corresponding path program 28 times [2021-01-06 10:38:35,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:35,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881397429] [2021-01-06 10:38:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:35,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881397429] [2021-01-06 10:38:35,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752831237] [2021-01-06 10:38:35,721 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:35,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:35,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:35,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:38:35,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:36,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:36,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 10:38:36,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083459359] [2021-01-06 10:38:36,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:38:36,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:36,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:38:36,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:38:36,026 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 30 states. [2021-01-06 10:38:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:36,126 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2021-01-06 10:38:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:38:36,128 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 133 [2021-01-06 10:38:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:36,129 INFO L225 Difference]: With dead ends: 216 [2021-01-06 10:38:36,129 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 10:38:36,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:38:36,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 10:38:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-01-06 10:38:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 10:38:36,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-01-06 10:38:36,134 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2021-01-06 10:38:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:36,134 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-01-06 10:38:36,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:38:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-01-06 10:38:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:38:36,135 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:36,135 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 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] [2021-01-06 10:38:36,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:36,350 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 29 times [2021-01-06 10:38:36,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:36,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359904731] [2021-01-06 10:38:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:36,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359904731] [2021-01-06 10:38:36,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144700078] [2021-01-06 10:38:36,936 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:47,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-01-06 10:38:47,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:47,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:38:47,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2021-01-06 10:38:48,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:48,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2021-01-06 10:38:48,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337730800] [2021-01-06 10:38:48,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 10:38:48,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:48,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 10:38:48,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:38:48,052 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 39 states. [2021-01-06 10:38:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:48,335 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2021-01-06 10:38:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:38:48,336 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 135 [2021-01-06 10:38:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:48,337 INFO L225 Difference]: With dead ends: 227 [2021-01-06 10:38:48,337 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 10:38:48,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:38:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 10:38:48,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2021-01-06 10:38:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 10:38:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2021-01-06 10:38:48,343 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 135 [2021-01-06 10:38:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:48,344 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2021-01-06 10:38:48,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 10:38:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2021-01-06 10:38:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-01-06 10:38:48,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:48,345 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:48,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:48,559 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:48,560 INFO L82 PathProgramCache]: Analyzing trace with hash 191675914, now seen corresponding path program 30 times [2021-01-06 10:38:48,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:48,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73696363] [2021-01-06 10:38:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-01-06 10:38:49,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73696363] [2021-01-06 10:38:49,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152409175] [2021-01-06 10:38:49,228 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:52,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 10:38:52,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:38:52,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-01-06 10:38:53,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:53,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2021-01-06 10:38:53,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335687101] [2021-01-06 10:38:53,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:38:53,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:53,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:38:53,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:38:53,213 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 40 states. [2021-01-06 10:38:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:53,442 INFO L93 Difference]: Finished difference Result 235 states and 244 transitions. [2021-01-06 10:38:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:38:53,443 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 143 [2021-01-06 10:38:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:53,444 INFO L225 Difference]: With dead ends: 235 [2021-01-06 10:38:53,444 INFO L226 Difference]: Without dead ends: 150 [2021-01-06 10:38:53,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:38:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-01-06 10:38:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-01-06 10:38:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2021-01-06 10:38:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2021-01-06 10:38:53,450 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 143 [2021-01-06 10:38:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:53,450 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2021-01-06 10:38:53,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:38:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2021-01-06 10:38:53,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-01-06 10:38:53,451 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:53,451 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 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] [2021-01-06 10:38:53,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:38:53,664 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:53,665 INFO L82 PathProgramCache]: Analyzing trace with hash 10412358, now seen corresponding path program 31 times [2021-01-06 10:38:53,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:53,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034028972] [2021-01-06 10:38:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:54,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034028972] [2021-01-06 10:38:54,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462089953] [2021-01-06 10:38:54,360 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:54,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:38:54,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:54,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:54,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 10:38:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609209458] [2021-01-06 10:38:54,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:38:54,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:54,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:38:54,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:38:54,674 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 33 states. [2021-01-06 10:38:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:54,809 INFO L93 Difference]: Finished difference Result 238 states and 246 transitions. [2021-01-06 10:38:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:38:54,810 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 147 [2021-01-06 10:38:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:54,812 INFO L225 Difference]: With dead ends: 238 [2021-01-06 10:38:54,813 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 10:38:54,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:38:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 10:38:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-01-06 10:38:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2021-01-06 10:38:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-01-06 10:38:54,818 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 147 [2021-01-06 10:38:54,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:54,819 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-01-06 10:38:54,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:38:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-01-06 10:38:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-01-06 10:38:54,820 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:54,820 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 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] [2021-01-06 10:38:55,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:55,034 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash 308754692, now seen corresponding path program 32 times [2021-01-06 10:38:55,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:55,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559871242] [2021-01-06 10:38:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:55,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559871242] [2021-01-06 10:38:55,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314796679] [2021-01-06 10:38:55,773 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:55,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:55,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:55,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:38:55,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:56,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:56,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 10:38:56,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864873515] [2021-01-06 10:38:56,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:38:56,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:56,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:38:56,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:38:56,094 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 34 states. [2021-01-06 10:38:56,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:56,213 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2021-01-06 10:38:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:38:56,214 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2021-01-06 10:38:56,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:56,215 INFO L225 Difference]: With dead ends: 240 [2021-01-06 10:38:56,215 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 10:38:56,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:38:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 10:38:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-01-06 10:38:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 10:38:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-01-06 10:38:56,221 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2021-01-06 10:38:56,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:56,221 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-01-06 10:38:56,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:38:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-01-06 10:38:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 10:38:56,222 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:56,223 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 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] [2021-01-06 10:38:56,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:38:56,436 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:56,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:56,437 INFO L82 PathProgramCache]: Analyzing trace with hash -747071166, now seen corresponding path program 33 times [2021-01-06 10:38:56,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:56,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804704854] [2021-01-06 10:38:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:57,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804704854] [2021-01-06 10:38:57,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437813550] [2021-01-06 10:38:57,181 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:57,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:38:57,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:57,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:38:57,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2021-01-06 10:38:58,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:58,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 12] total 44 [2021-01-06 10:38:58,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295395833] [2021-01-06 10:38:58,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:38:58,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:38:58,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:38:58,425 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 44 states. [2021-01-06 10:38:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:58,865 INFO L93 Difference]: Finished difference Result 251 states and 262 transitions. [2021-01-06 10:38:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:38:58,865 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 151 [2021-01-06 10:38:58,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:58,867 INFO L225 Difference]: With dead ends: 251 [2021-01-06 10:38:58,867 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 10:38:58,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:38:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 10:38:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2021-01-06 10:38:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:38:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2021-01-06 10:38:58,873 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 151 [2021-01-06 10:38:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:58,873 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2021-01-06 10:38:58,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:38:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2021-01-06 10:38:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-01-06 10:38:58,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:58,874 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:59,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:59,088 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash -629222402, now seen corresponding path program 34 times [2021-01-06 10:38:59,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:59,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030165014] [2021-01-06 10:38:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-01-06 10:38:59,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030165014] [2021-01-06 10:38:59,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200295271] [2021-01-06 10:38:59,859 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:00,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:39:00,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:39:00,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 10:39:00,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:39:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-01-06 10:39:00,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:39:00,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 10:39:00,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553395564] [2021-01-06 10:39:00,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:39:00,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:39:00,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:39:00,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:39:00,189 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 36 states. [2021-01-06 10:39:00,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:39:00,322 INFO L93 Difference]: Finished difference Result 256 states and 264 transitions. [2021-01-06 10:39:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 10:39:00,323 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2021-01-06 10:39:00,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:39:00,324 INFO L225 Difference]: With dead ends: 256 [2021-01-06 10:39:00,324 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 10:39:00,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:39:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 10:39:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-01-06 10:39:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 10:39:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2021-01-06 10:39:00,330 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2021-01-06 10:39:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:39:00,330 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2021-01-06 10:39:00,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:39:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2021-01-06 10:39:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 10:39:00,331 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:39:00,332 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:39:00,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:39:00,546 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:39:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:39:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 35 times [2021-01-06 10:39:00,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:39:00,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993657637] [2021-01-06 10:39:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:39:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-01-06 10:39:01,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993657637] [2021-01-06 10:39:01,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065829033] [2021-01-06 10:39:01,325 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:46,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-01-06 10:39:46,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:39:46,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:39:46,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:39:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2021-01-06 10:39:47,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:39:47,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2021-01-06 10:39:47,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899303446] [2021-01-06 10:39:47,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:39:47,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:39:47,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:39:47,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:39:47,080 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 47 states. [2021-01-06 10:39:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:39:47,493 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2021-01-06 10:39:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:39:47,494 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 161 [2021-01-06 10:39:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:39:47,495 INFO L225 Difference]: With dead ends: 267 [2021-01-06 10:39:47,495 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 10:39:47,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:39:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 10:39:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2021-01-06 10:39:47,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 10:39:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2021-01-06 10:39:47,501 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2021-01-06 10:39:47,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:39:47,501 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2021-01-06 10:39:47,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:39:47,502 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2021-01-06 10:39:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-01-06 10:39:47,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:39:47,503 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:39:47,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:39:47,718 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:39:47,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:39:47,718 INFO L82 PathProgramCache]: Analyzing trace with hash -628416392, now seen corresponding path program 36 times [2021-01-06 10:39:47,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:39:47,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560219276] [2021-01-06 10:39:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:39:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-01-06 10:39:48,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560219276] [2021-01-06 10:39:48,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476237784] [2021-01-06 10:39:48,666 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:53,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:39:53,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:39:54,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:39:54,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:39:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2021-01-06 10:39:54,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:39:54,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 12] total 47 [2021-01-06 10:39:54,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683937415] [2021-01-06 10:39:54,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:39:54,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:39:54,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:39:54,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:39:54,496 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 47 states. [2021-01-06 10:39:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:39:54,711 INFO L93 Difference]: Finished difference Result 275 states and 284 transitions. [2021-01-06 10:39:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:39:54,712 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 169 [2021-01-06 10:39:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:39:54,713 INFO L225 Difference]: With dead ends: 275 [2021-01-06 10:39:54,713 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 10:39:54,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:39:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 10:39:54,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2021-01-06 10:39:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 10:39:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2021-01-06 10:39:54,720 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 169 [2021-01-06 10:39:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:39:54,720 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2021-01-06 10:39:54,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:39:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2021-01-06 10:39:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 10:39:54,721 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:39:54,721 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:39:54,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:39:54,934 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:39:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:39:54,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1334735180, now seen corresponding path program 37 times [2021-01-06 10:39:54,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:39:54,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481122618] [2021-01-06 10:39:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:39:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:39:55,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481122618] [2021-01-06 10:39:55,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487764961] [2021-01-06 10:39:55,878 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:56,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 10:39:56,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:39:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:39:56,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:39:56,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 10:39:56,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653247680] [2021-01-06 10:39:56,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 10:39:56,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:39:56,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 10:39:56,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:39:56,230 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 39 states. [2021-01-06 10:39:56,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:39:56,395 INFO L93 Difference]: Finished difference Result 278 states and 286 transitions. [2021-01-06 10:39:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 10:39:56,395 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 173 [2021-01-06 10:39:56,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:39:56,396 INFO L225 Difference]: With dead ends: 278 [2021-01-06 10:39:56,396 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 10:39:56,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:39:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 10:39:56,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-01-06 10:39:56,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 10:39:56,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2021-01-06 10:39:56,403 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 173 [2021-01-06 10:39:56,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:39:56,403 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2021-01-06 10:39:56,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 10:39:56,403 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2021-01-06 10:39:56,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-01-06 10:39:56,404 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:39:56,404 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:39:56,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:39:56,620 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:39:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:39:56,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1357540110, now seen corresponding path program 38 times [2021-01-06 10:39:56,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:39:56,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999626344] [2021-01-06 10:39:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:39:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:39:57,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999626344] [2021-01-06 10:39:57,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011396810] [2021-01-06 10:39:57,698 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:57,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:39:57,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:39:57,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:39:57,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:39:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:39:58,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:39:58,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 10:39:58,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092034378] [2021-01-06 10:39:58,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:39:58,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:39:58,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:39:58,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:39:58,081 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 40 states. [2021-01-06 10:39:58,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:39:58,243 INFO L93 Difference]: Finished difference Result 280 states and 288 transitions. [2021-01-06 10:39:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:39:58,244 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 175 [2021-01-06 10:39:58,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:39:58,245 INFO L225 Difference]: With dead ends: 280 [2021-01-06 10:39:58,245 INFO L226 Difference]: Without dead ends: 179 [2021-01-06 10:39:58,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:39:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-01-06 10:39:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2021-01-06 10:39:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 10:39:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-01-06 10:39:58,252 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 175 [2021-01-06 10:39:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:39:58,252 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-01-06 10:39:58,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:39:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-01-06 10:39:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-01-06 10:39:58,253 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:39:58,254 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:39:58,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:58,469 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:39:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:39:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1798241360, now seen corresponding path program 39 times [2021-01-06 10:39:58,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:39:58,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011270046] [2021-01-06 10:39:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:39:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:39:59,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011270046] [2021-01-06 10:39:59,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468022205] [2021-01-06 10:39:59,478 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:00,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 10:40:00,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:40:00,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:40:00,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:40:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2021-01-06 10:40:01,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:40:01,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13] total 51 [2021-01-06 10:40:01,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449406436] [2021-01-06 10:40:01,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 10:40:01,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:40:01,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 10:40:01,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:40:01,322 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 51 states. [2021-01-06 10:40:01,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:40:01,579 INFO L93 Difference]: Finished difference Result 285 states and 294 transitions. [2021-01-06 10:40:01,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 10:40:01,580 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 177 [2021-01-06 10:40:01,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:40:01,581 INFO L225 Difference]: With dead ends: 285 [2021-01-06 10:40:01,581 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 10:40:01,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:40:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 10:40:01,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2021-01-06 10:40:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 10:40:01,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2021-01-06 10:40:01,588 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 177 [2021-01-06 10:40:01,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:40:01,589 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2021-01-06 10:40:01,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 10:40:01,589 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2021-01-06 10:40:01,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 10:40:01,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:40:01,590 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 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] [2021-01-06 10:40:01,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 10:40:01,805 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:40:01,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:40:01,805 INFO L82 PathProgramCache]: Analyzing trace with hash -641145364, now seen corresponding path program 40 times [2021-01-06 10:40:01,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:40:01,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758765397] [2021-01-06 10:40:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:40:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:40:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1928 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 10:40:02,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758765397] [2021-01-06 10:40:02,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668975652] [2021-01-06 10:40:02,943 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:03,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:40:03,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:40:03,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:40:03,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:40:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1928 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1807 trivial. 0 not checked. [2021-01-06 10:40:03,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:40:03,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 14] total 53 [2021-01-06 10:40:03,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366592342] [2021-01-06 10:40:03,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 10:40:03,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:40:03,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 10:40:03,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=1846, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:40:03,662 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 53 states. [2021-01-06 10:40:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:40:03,927 INFO L93 Difference]: Finished difference Result 291 states and 300 transitions. [2021-01-06 10:40:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 10:40:03,928 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 181 [2021-01-06 10:40:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:40:03,929 INFO L225 Difference]: With dead ends: 291 [2021-01-06 10:40:03,929 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 10:40:03,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=910, Invalid=1846, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:40:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 10:40:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2021-01-06 10:40:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 10:40:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2021-01-06 10:40:03,935 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 181 [2021-01-06 10:40:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:40:03,935 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2021-01-06 10:40:03,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 10:40:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2021-01-06 10:40:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-01-06 10:40:03,936 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:40:03,937 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:40:04,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:04,151 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:40:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:40:04,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2067850712, now seen corresponding path program 41 times [2021-01-06 10:40:04,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:40:04,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167778641] [2021-01-06 10:40:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:40:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:40:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-01-06 10:40:05,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167778641] [2021-01-06 10:40:05,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768538260] [2021-01-06 10:40:05,293 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true