/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:42:21,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:42:21,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:42:21,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:42:21,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:42:21,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:42:21,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:42:21,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:42:21,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:42:21,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:42:21,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:42:21,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:42:21,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:42:21,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:42:21,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:42:21,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:42:21,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:42:21,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:42:21,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:42:21,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:42:21,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:42:21,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:42:21,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:42:21,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:42:21,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:42:21,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:42:21,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:42:21,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:42:21,570 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:42:21,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:42:21,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:42:21,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:42:21,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:42:21,608 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:42:21,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:42:21,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:42:21,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:42:21,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:42:21,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:42:21,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:42:21,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:42:21,610 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:42:21,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:42:21,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:42:21,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:42:21,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:42:21,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:21,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:42:21,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:42:21,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:42:21,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:42:21,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:42:21,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:42:21,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:42:21,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:42:22,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:42:22,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:42:22,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:42:22,210 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:42:22,211 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:42:22,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2021-01-06 09:42:22,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/55a48995c/24149ca6692b4306a43064eb885f3185/FLAG90ad07e1b [2021-01-06 09:42:23,244 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:42:23,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2021-01-06 09:42:23,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/55a48995c/24149ca6692b4306a43064eb885f3185/FLAG90ad07e1b [2021-01-06 09:42:23,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/55a48995c/24149ca6692b4306a43064eb885f3185 [2021-01-06 09:42:23,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:42:23,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:42:23,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:23,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:42:23,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:42:23,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:23" (1/1) ... [2021-01-06 09:42:23,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7841ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:23, skipping insertion in model container [2021-01-06 09:42:23,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:23" (1/1) ... [2021-01-06 09:42:23,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:42:23,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:42:24,031 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a4~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a5~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:24,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:24,075 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:42:24,093 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a4~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a4~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a5~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a5~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:24,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:24,137 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:42:24,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24 WrapperNode [2021-01-06 09:42:24,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:24,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:24,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:42:24,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:42:24,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24" (1/1) ... [2021-01-06 09:42:24,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24" (1/1) ... [2021-01-06 09:42:24,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:24,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:42:24,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:42:24,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:42:24,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24" (1/1) ... [2021-01-06 09:42:24,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24" (1/1) ... [2021-01-06 09:42:24,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24" (1/1) ... [2021-01-06 09:42:24,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24" (1/1) ... [2021-01-06 09:42:24,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24" (1/1) ... [2021-01-06 09:42:24,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24" (1/1) ... [2021-01-06 09:42:24,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24" (1/1) ... [2021-01-06 09:42:24,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:42:24,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:42:24,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:42:24,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:42:24,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:42:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:42:24,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:42:24,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:42:24,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:42:24,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:42:24,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:42:25,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:42:25,096 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 09:42:25,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:25 BoogieIcfgContainer [2021-01-06 09:42:25,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:42:25,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:42:25,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:42:25,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:42:25,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:42:23" (1/3) ... [2021-01-06 09:42:25,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38aef502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:25, skipping insertion in model container [2021-01-06 09:42:25,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:24" (2/3) ... [2021-01-06 09:42:25,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38aef502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:25, skipping insertion in model container [2021-01-06 09:42:25,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:25" (3/3) ... [2021-01-06 09:42:25,137 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2021-01-06 09:42:25,153 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:42:25,168 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:42:25,234 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:42:25,303 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:42:25,304 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:42:25,304 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:42:25,304 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:42:25,304 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:42:25,304 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:42:25,304 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:42:25,305 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:42:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-01-06 09:42:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 09:42:25,349 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:25,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:25,354 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:25,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:25,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1890477095, now seen corresponding path program 1 times [2021-01-06 09:42:25,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:25,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146445262] [2021-01-06 09:42:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:42:25,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146445262] [2021-01-06 09:42:25,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:42:25,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:42:25,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125024566] [2021-01-06 09:42:25,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:25,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:25,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:42:25,976 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2021-01-06 09:42:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:26,065 INFO L93 Difference]: Finished difference Result 52 states and 76 transitions. [2021-01-06 09:42:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:26,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-01-06 09:42:26,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:26,100 INFO L225 Difference]: With dead ends: 52 [2021-01-06 09:42:26,100 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 09:42:26,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:42:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 09:42:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 09:42:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:42:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-01-06 09:42:26,190 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2021-01-06 09:42:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:26,193 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-01-06 09:42:26,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-01-06 09:42:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 09:42:26,197 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:26,198 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 09:42:26,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:42:26,200 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:26,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:26,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1812867813, now seen corresponding path program 1 times [2021-01-06 09:42:26,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:26,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424498753] [2021-01-06 09:42:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:26,413 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 09:42:26,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424498753] [2021-01-06 09:42:26,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302601118] [2021-01-06 09:42:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:26,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:42:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:26,578 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 09:42:26,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:42:26,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:42:26,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854397742] [2021-01-06 09:42:26,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:26,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:26,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:26,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:26,585 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 3 states. [2021-01-06 09:42:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:26,681 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-01-06 09:42:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:26,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 09:42:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:26,684 INFO L225 Difference]: With dead ends: 48 [2021-01-06 09:42:26,684 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:42:26,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 09:42:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:42:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-01-06 09:42:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 09:42:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-01-06 09:42:26,695 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2021-01-06 09:42:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:26,695 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-01-06 09:42:26,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-01-06 09:42:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 09:42:26,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:26,697 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 09:42:26,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:42:26,914 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2029995939, now seen corresponding path program 1 times [2021-01-06 09:42:26,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:26,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206790833] [2021-01-06 09:42:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:27,071 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 09:42:27,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206790833] [2021-01-06 09:42:27,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052367754] [2021-01-06 09:42:27,077 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 09:42:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:27,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:27,278 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 09:42:27,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:27,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:27,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863053994] [2021-01-06 09:42:27,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:27,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:27,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:27,282 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2021-01-06 09:42:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:27,321 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-01-06 09:42:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:27,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2021-01-06 09:42:27,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:27,324 INFO L225 Difference]: With dead ends: 54 [2021-01-06 09:42:27,324 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 09:42:27,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:27,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 09:42:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 09:42:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 09:42:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-01-06 09:42:27,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 25 [2021-01-06 09:42:27,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:27,335 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-01-06 09:42:27,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:27,336 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-01-06 09:42:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 09:42:27,337 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:27,337 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] [2021-01-06 09:42:27,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:27,552 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:27,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2073930139, now seen corresponding path program 2 times [2021-01-06 09:42:27,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:27,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676153796] [2021-01-06 09:42:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 09:42:27,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676153796] [2021-01-06 09:42:27,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241146290] [2021-01-06 09:42:27,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:27,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:27,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:27,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 09:42:27,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:27,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:27,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430839460] [2021-01-06 09:42:27,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:27,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:27,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:27,829 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2021-01-06 09:42:28,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:28,013 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-01-06 09:42:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:28,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2021-01-06 09:42:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:28,016 INFO L225 Difference]: With dead ends: 61 [2021-01-06 09:42:28,016 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 09:42:28,017 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 09:42:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 09:42:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-01-06 09:42:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 09:42:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-01-06 09:42:28,027 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 27 [2021-01-06 09:42:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:28,028 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-01-06 09:42:28,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-01-06 09:42:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 09:42:28,030 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:28,030 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] [2021-01-06 09:42:28,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:28,245 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash -662535917, now seen corresponding path program 3 times [2021-01-06 09:42:28,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:28,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266522542] [2021-01-06 09:42:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:28,360 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 09:42:28,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266522542] [2021-01-06 09:42:28,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903041018] [2021-01-06 09:42:28,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:28,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:42:28,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:28,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:28,540 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 09:42:28,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:28,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:42:28,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135835955] [2021-01-06 09:42:28,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:42:28,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:28,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:42:28,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:42:28,545 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2021-01-06 09:42:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:28,585 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-01-06 09:42:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:42:28,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2021-01-06 09:42:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:28,587 INFO L225 Difference]: With dead ends: 72 [2021-01-06 09:42:28,587 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 09:42:28,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:42:28,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 09:42:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-01-06 09:42:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 09:42:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-01-06 09:42:28,595 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2021-01-06 09:42:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:28,595 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-01-06 09:42:28,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:42:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-01-06 09:42:28,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 09:42:28,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:28,598 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:28,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:28,813 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:28,815 INFO L82 PathProgramCache]: Analyzing trace with hash 365526225, now seen corresponding path program 4 times [2021-01-06 09:42:28,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:28,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959533427] [2021-01-06 09:42:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 09:42:29,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959533427] [2021-01-06 09:42:29,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253491639] [2021-01-06 09:42:29,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:29,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:29,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:29,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:42:29,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 09:42:29,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:29,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:42:29,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846669256] [2021-01-06 09:42:29,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:42:29,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:29,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:42:29,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:29,194 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2021-01-06 09:42:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:29,243 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-01-06 09:42:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:42:29,244 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2021-01-06 09:42:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:29,245 INFO L225 Difference]: With dead ends: 74 [2021-01-06 09:42:29,246 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 09:42:29,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 09:42:29,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-01-06 09:42:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 09:42:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-01-06 09:42:29,256 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 37 [2021-01-06 09:42:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:29,256 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-01-06 09:42:29,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:42:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-01-06 09:42:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 09:42:29,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:29,258 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:29,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:42:29,472 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash 490766607, now seen corresponding path program 5 times [2021-01-06 09:42:29,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:29,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545809780] [2021-01-06 09:42:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 09:42:29,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545809780] [2021-01-06 09:42:29,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371465926] [2021-01-06 09:42:29,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:30,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 09:42:30,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:30,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:30,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 09:42:30,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:30,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 09:42:30,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215117612] [2021-01-06 09:42:30,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:42:30,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:30,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:42:30,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:42:30,315 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 10 states. [2021-01-06 09:42:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:30,613 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2021-01-06 09:42:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:42:30,615 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2021-01-06 09:42:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:30,619 INFO L225 Difference]: With dead ends: 88 [2021-01-06 09:42:30,619 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 09:42:30,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 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 09:42:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 09:42:30,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-01-06 09:42:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 09:42:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-01-06 09:42:30,662 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 39 [2021-01-06 09:42:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:30,663 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-01-06 09:42:30,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:42:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-01-06 09:42:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 09:42:30,669 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:30,669 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:30,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:30,885 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:30,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:30,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1480545093, now seen corresponding path program 6 times [2021-01-06 09:42:30,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:30,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311191706] [2021-01-06 09:42:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:31,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311191706] [2021-01-06 09:42:31,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362328903] [2021-01-06 09:42:31,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:31,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 09:42:31,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:31,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:42:31,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:31,458 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 09:42:31,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:31,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-01-06 09:42:31,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093106781] [2021-01-06 09:42:31,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:42:31,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:31,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:42:31,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:31,462 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 12 states. [2021-01-06 09:42:31,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:31,699 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-01-06 09:42:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:42:31,701 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2021-01-06 09:42:31,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:31,702 INFO L225 Difference]: With dead ends: 106 [2021-01-06 09:42:31,703 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 09:42:31,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 09:42:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-01-06 09:42:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 09:42:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-01-06 09:42:31,712 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 49 [2021-01-06 09:42:31,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:31,713 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-01-06 09:42:31,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:42:31,713 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-01-06 09:42:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 09:42:31,715 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:31,715 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:31,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:31,931 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:31,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:31,933 INFO L82 PathProgramCache]: Analyzing trace with hash -352839173, now seen corresponding path program 7 times [2021-01-06 09:42:31,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:31,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030977249] [2021-01-06 09:42:31,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:42:32,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030977249] [2021-01-06 09:42:32,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457989933] [2021-01-06 09:42:32,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:32,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:42:32,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:42:32,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:32,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:42:32,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997504032] [2021-01-06 09:42:32,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:42:32,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:42:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:42:32,308 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 10 states. [2021-01-06 09:42:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:32,373 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2021-01-06 09:42:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:42:32,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2021-01-06 09:42:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:32,375 INFO L225 Difference]: With dead ends: 112 [2021-01-06 09:42:32,375 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 09:42:32,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:42:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 09:42:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-01-06 09:42:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:42:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-01-06 09:42:32,385 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 59 [2021-01-06 09:42:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:32,385 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-01-06 09:42:32,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:42:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-01-06 09:42:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:42:32,387 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:32,387 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:32,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:42:32,602 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:32,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1382597703, now seen corresponding path program 8 times [2021-01-06 09:42:32,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:32,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349441163] [2021-01-06 09:42:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:42:32,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349441163] [2021-01-06 09:42:32,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278545266] [2021-01-06 09:42:32,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:32,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:32,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:32,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:42:32,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:42:33,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:33,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:42:33,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877946019] [2021-01-06 09:42:33,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:42:33,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:33,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:42:33,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:33,025 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 11 states. [2021-01-06 09:42:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:33,079 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-01-06 09:42:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:42:33,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2021-01-06 09:42:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:33,080 INFO L225 Difference]: With dead ends: 114 [2021-01-06 09:42:33,080 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 09:42:33,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 09:42:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-01-06 09:42:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 09:42:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-01-06 09:42:33,090 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 61 [2021-01-06 09:42:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:33,090 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-01-06 09:42:33,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:42:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-01-06 09:42:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 09:42:33,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:33,092 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:33,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:33,307 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1156900343, now seen corresponding path program 9 times [2021-01-06 09:42:33,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:33,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906174629] [2021-01-06 09:42:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:42:33,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906174629] [2021-01-06 09:42:33,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179282095] [2021-01-06 09:42:33,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:33,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 09:42:33,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:33,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:42:33,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 09:42:34,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:34,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-01-06 09:42:34,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819965766] [2021-01-06 09:42:34,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:42:34,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:34,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:42:34,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:42:34,033 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 16 states. [2021-01-06 09:42:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:34,296 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2021-01-06 09:42:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:42:34,297 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2021-01-06 09:42:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:34,298 INFO L225 Difference]: With dead ends: 128 [2021-01-06 09:42:34,298 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 09:42:34,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:42:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 09:42:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-01-06 09:42:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 09:42:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2021-01-06 09:42:34,305 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 63 [2021-01-06 09:42:34,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:34,306 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2021-01-06 09:42:34,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:42:34,306 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2021-01-06 09:42:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 09:42:34,307 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:34,307 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:34,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:34,523 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:34,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2005284397, now seen corresponding path program 10 times [2021-01-06 09:42:34,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:34,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108875924] [2021-01-06 09:42:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:34,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108875924] [2021-01-06 09:42:34,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361753268] [2021-01-06 09:42:34,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:34,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:34,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:34,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:42:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-01-06 09:42:35,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:35,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-01-06 09:42:35,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819372190] [2021-01-06 09:42:35,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:42:35,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:35,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:42:35,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:42:35,036 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 18 states. [2021-01-06 09:42:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:35,404 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2021-01-06 09:42:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:42:35,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2021-01-06 09:42:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:35,406 INFO L225 Difference]: With dead ends: 146 [2021-01-06 09:42:35,406 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 09:42:35,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:42:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 09:42:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-01-06 09:42:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 09:42:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2021-01-06 09:42:35,417 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 73 [2021-01-06 09:42:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:35,417 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2021-01-06 09:42:35,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:42:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2021-01-06 09:42:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 09:42:35,419 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:35,419 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:35,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:42:35,621 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:35,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1859910371, now seen corresponding path program 11 times [2021-01-06 09:42:35,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:35,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892615138] [2021-01-06 09:42:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 09:42:35,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892615138] [2021-01-06 09:42:35,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808996312] [2021-01-06 09:42:35,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:44:26,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 09:44:26,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:44:26,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:44:26,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:44:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-01-06 09:44:26,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:44:26,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-01-06 09:44:26,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299757918] [2021-01-06 09:44:26,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:44:26,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:44:26,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:44:26,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:44:26,755 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 20 states. [2021-01-06 09:44:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:44:26,996 INFO L93 Difference]: Finished difference Result 164 states and 178 transitions. [2021-01-06 09:44:27,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 09:44:27,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 83 [2021-01-06 09:44:27,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:44:27,002 INFO L225 Difference]: With dead ends: 164 [2021-01-06 09:44:27,002 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 09:44:27,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:44:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 09:44:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-01-06 09:44:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 09:44:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-01-06 09:44:27,008 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 83 [2021-01-06 09:44:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:44:27,009 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-01-06 09:44:27,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:44:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-01-06 09:44:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 09:44:27,010 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:44:27,010 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:44:27,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:44:27,226 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:44:27,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:44:27,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2078895079, now seen corresponding path program 12 times [2021-01-06 09:44:27,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:44:27,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572165050] [2021-01-06 09:44:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:44:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:44:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:44:27,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572165050] [2021-01-06 09:44:27,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830688462] [2021-01-06 09:44:27,464 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 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 09:44:33,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-01-06 09:44:33,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:44:33,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 09:44:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:44:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:44:33,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:44:33,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:44:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806444604] [2021-01-06 09:44:33,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:44:33,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:44:33,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:44:33,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:44:33,843 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 15 states. [2021-01-06 09:44:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:44:33,899 INFO L93 Difference]: Finished difference Result 170 states and 180 transitions. [2021-01-06 09:44:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:44:33,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 93 [2021-01-06 09:44:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:44:33,901 INFO L225 Difference]: With dead ends: 170 [2021-01-06 09:44:33,901 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 09:44:33,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:44:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 09:44:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-01-06 09:44:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 09:44:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2021-01-06 09:44:33,908 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 93 [2021-01-06 09:44:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:44:33,908 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2021-01-06 09:44:33,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:44:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2021-01-06 09:44:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 09:44:33,909 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:44:33,910 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:44:34,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:44:34,111 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:44:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:44:34,112 INFO L82 PathProgramCache]: Analyzing trace with hash 613140055, now seen corresponding path program 13 times [2021-01-06 09:44:34,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:44:34,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172949008] [2021-01-06 09:44:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:44:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:44:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:44:34,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172949008] [2021-01-06 09:44:34,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748170699] [2021-01-06 09:44:34,369 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 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 09:44:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:44:34,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:44:34,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:44:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:44:34,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:44:34,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:44:34,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810726594] [2021-01-06 09:44:34,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:44:34,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:44:34,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:44:34,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:44:34,570 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand 16 states. [2021-01-06 09:44:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:44:34,632 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2021-01-06 09:44:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:44:34,633 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2021-01-06 09:44:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:44:34,634 INFO L225 Difference]: With dead ends: 172 [2021-01-06 09:44:34,634 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 09:44:34,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 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 09:44:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 09:44:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-01-06 09:44:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 09:44:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-01-06 09:44:34,640 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 95 [2021-01-06 09:44:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:44:34,641 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-01-06 09:44:34,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:44:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-01-06 09:44:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 09:44:34,642 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:44:34,642 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:44:34,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:44:34,856 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:44:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:44:34,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2088591637, now seen corresponding path program 14 times [2021-01-06 09:44:34,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:44:34,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403830660] [2021-01-06 09:44:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:44:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:44:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:44:35,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403830660] [2021-01-06 09:44:35,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433642503] [2021-01-06 09:44:35,080 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 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 09:44:35,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:44:35,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:44:35,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:44:35,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:44:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:44:35,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:44:35,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:44:35,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044419455] [2021-01-06 09:44:35,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:44:35,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:44:35,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:44:35,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:44:35,396 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 17 states. [2021-01-06 09:44:35,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:44:35,481 INFO L93 Difference]: Finished difference Result 174 states and 184 transitions. [2021-01-06 09:44:35,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:44:35,482 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2021-01-06 09:44:35,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:44:35,483 INFO L225 Difference]: With dead ends: 174 [2021-01-06 09:44:35,484 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 09:44:35,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:44:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 09:44:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-01-06 09:44:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 09:44:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-01-06 09:44:35,492 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 97 [2021-01-06 09:44:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:44:35,492 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-01-06 09:44:35,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:44:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-01-06 09:44:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 09:44:35,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:44:35,494 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:44:35,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:44:35,709 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:44:35,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:44:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1636613037, now seen corresponding path program 15 times [2021-01-06 09:44:35,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:44:35,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34205260] [2021-01-06 09:44:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:44:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:44:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:44:35,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34205260] [2021-01-06 09:44:35,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286287906] [2021-01-06 09:44:35,983 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 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 09:44:38,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 09:44:38,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:44:38,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:44:38,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:44:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-01-06 09:44:38,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:44:38,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 25 [2021-01-06 09:44:38,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125763800] [2021-01-06 09:44:38,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 09:44:38,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:44:38,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 09:44:38,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:44:38,698 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 25 states. [2021-01-06 09:44:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:44:38,984 INFO L93 Difference]: Finished difference Result 188 states and 202 transitions. [2021-01-06 09:44:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 09:44:38,985 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 99 [2021-01-06 09:44:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:44:38,986 INFO L225 Difference]: With dead ends: 188 [2021-01-06 09:44:38,986 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 09:44:38,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:44:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 09:44:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2021-01-06 09:44:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 09:44:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2021-01-06 09:44:38,992 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 99 [2021-01-06 09:44:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:44:38,992 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2021-01-06 09:44:38,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 09:44:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2021-01-06 09:44:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-06 09:44:38,994 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:44:38,994 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:44:39,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:44:39,197 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:44:39,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:44:39,198 INFO L82 PathProgramCache]: Analyzing trace with hash -948989559, now seen corresponding path program 16 times [2021-01-06 09:44:39,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:44:39,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081011773] [2021-01-06 09:44:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:44:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:44:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 09:44:39,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081011773] [2021-01-06 09:44:39,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062113729] [2021-01-06 09:44:39,459 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 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 09:44:39,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:44:39,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:44:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:44:39,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:44:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 09:44:39,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:44:39,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:44:39,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356149991] [2021-01-06 09:44:39,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:44:39,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:44:39,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:44:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:44:39,762 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand 19 states. [2021-01-06 09:44:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:44:39,834 INFO L93 Difference]: Finished difference Result 194 states and 204 transitions. [2021-01-06 09:44:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:44:39,835 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 109 [2021-01-06 09:44:39,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:44:39,836 INFO L225 Difference]: With dead ends: 194 [2021-01-06 09:44:39,836 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 09:44:39,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:44:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 09:44:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-01-06 09:44:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 09:44:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2021-01-06 09:44:39,845 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 109 [2021-01-06 09:44:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:44:39,845 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2021-01-06 09:44:39,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:44:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2021-01-06 09:44:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 09:44:39,847 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:44:39,847 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:44:40,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:44:40,061 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:44:40,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:44:40,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1805350969, now seen corresponding path program 17 times [2021-01-06 09:44:40,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:44:40,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903651541] [2021-01-06 09:44:40,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:44:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:44:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 09:44:40,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903651541] [2021-01-06 09:44:40,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899151159] [2021-01-06 09:44:40,347 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 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