/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_init3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:51:32,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:51:32,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:51:32,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:51:32,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:51:32,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:51:32,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:51:32,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:51:32,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:51:32,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:51:32,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:51:32,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:51:32,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:51:32,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:51:32,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:51:32,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:51:32,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:51:32,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:51:32,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:51:32,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:51:32,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:51:32,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:51:32,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:51:32,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:51:32,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:51:32,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:51:32,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:51:32,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:51:32,411 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 09:51:32,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:51:32,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:51:32,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:51:32,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:51:32,439 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:51:32,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:51:32,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:51:32,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:51:32,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:51:32,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:51:32,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:51:32,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:51:32,440 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:51:32,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:51:32,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:51:32,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:51:32,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:51:32,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:51:32,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:51:32,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:51:32,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:51:32,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:51:32,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:51:32,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:51:32,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:51:32,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:51:32,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:51:32,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:51:32,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:51:32,907 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:51:32,908 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:51:32,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init3_ground-1.i [2021-01-06 09:51:32,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/81cdb34b1/699208285af943cfa277bff2840a7806/FLAGc9f69e346 [2021-01-06 09:51:33,597 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:51:33,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init3_ground-1.i [2021-01-06 09:51:33,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/81cdb34b1/699208285af943cfa277bff2840a7806/FLAGc9f69e346 [2021-01-06 09:51:33,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/81cdb34b1/699208285af943cfa277bff2840a7806 [2021-01-06 09:51:33,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:51:33,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:51:33,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:51:33,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:51:33,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:51:33,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:51:33" (1/1) ... [2021-01-06 09:51:33,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436f256f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:33, skipping insertion in model container [2021-01-06 09:51:33,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:51:33" (1/1) ... [2021-01-06 09:51:33,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:51:33,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:51:34,134 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_init3_ground-1.i[816,829] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:51:34,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:51:34,161 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:51:34,175 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_init3_ground-1.i[816,829] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:51:34,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:51:34,199 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:51:34,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34 WrapperNode [2021-01-06 09:51:34,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:51:34,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:51:34,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:51:34,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:51:34,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34" (1/1) ... [2021-01-06 09:51:34,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34" (1/1) ... [2021-01-06 09:51:34,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:51:34,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:51:34,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:51:34,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:51:34,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34" (1/1) ... [2021-01-06 09:51:34,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34" (1/1) ... [2021-01-06 09:51:34,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34" (1/1) ... [2021-01-06 09:51:34,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34" (1/1) ... [2021-01-06 09:51:34,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34" (1/1) ... [2021-01-06 09:51:34,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34" (1/1) ... [2021-01-06 09:51:34,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34" (1/1) ... [2021-01-06 09:51:34,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:51:34,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:51:34,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:51:34,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:51:34,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34" (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 09:51:34,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:51:34,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:51:34,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:51:34,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:51:34,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:51:34,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:51:34,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:51:34,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:51:34,718 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 09:51:34,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:51:34 BoogieIcfgContainer [2021-01-06 09:51:34,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:51:34,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:51:34,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:51:34,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:51:34,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:51:33" (1/3) ... [2021-01-06 09:51:34,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55669379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:51:34, skipping insertion in model container [2021-01-06 09:51:34,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:51:34" (2/3) ... [2021-01-06 09:51:34,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55669379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:51:34, skipping insertion in model container [2021-01-06 09:51:34,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:51:34" (3/3) ... [2021-01-06 09:51:34,746 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-1.i [2021-01-06 09:51:34,760 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:51:34,773 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:51:34,814 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:51:34,856 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:51:34,858 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:51:34,859 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:51:34,859 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:51:34,859 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:51:34,859 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:51:34,859 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:51:34,860 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:51:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 09:51:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 09:51:34,886 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:34,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:34,887 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:34,895 INFO L82 PathProgramCache]: Analyzing trace with hash -93359874, now seen corresponding path program 1 times [2021-01-06 09:51:34,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:34,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945044466] [2021-01-06 09:51:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:35,172 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 09:51:35,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945044466] [2021-01-06 09:51:35,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:51:35,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:51:35,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273161978] [2021-01-06 09:51:35,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:51:35,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:35,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:51:35,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:51:35,200 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-01-06 09:51:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:35,260 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2021-01-06 09:51:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:51:35,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 09:51:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:35,272 INFO L225 Difference]: With dead ends: 36 [2021-01-06 09:51:35,273 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 09:51:35,283 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 09:51:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 09:51:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 09:51:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 09:51:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-01-06 09:51:35,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2021-01-06 09:51:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:35,321 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-01-06 09:51:35,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:51:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-01-06 09:51:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 09:51:35,324 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:35,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:35,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:51:35,326 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:35,327 INFO L82 PathProgramCache]: Analyzing trace with hash -168681064, now seen corresponding path program 1 times [2021-01-06 09:51:35,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:35,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272609752] [2021-01-06 09:51:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:51:35,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272609752] [2021-01-06 09:51:35,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242066992] [2021-01-06 09:51:35,399 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 09:51:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:35,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:51:35,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:51:35,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:35,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:51:35,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61433248] [2021-01-06 09:51:35,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:51:35,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:35,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:51:35,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:51:35,529 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2021-01-06 09:51:35,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:35,569 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-01-06 09:51:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:51:35,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 09:51:35,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:35,570 INFO L225 Difference]: With dead ends: 33 [2021-01-06 09:51:35,570 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 09:51:35,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 09:51:35,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 09:51:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 09:51:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 09:51:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-01-06 09:51:35,577 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2021-01-06 09:51:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:35,578 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-01-06 09:51:35,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:51:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-01-06 09:51:35,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 09:51:35,579 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:35,579 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:35,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:51:35,794 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:35,795 INFO L82 PathProgramCache]: Analyzing trace with hash -873526594, now seen corresponding path program 2 times [2021-01-06 09:51:35,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:35,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655239358] [2021-01-06 09:51:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:51:35,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655239358] [2021-01-06 09:51:35,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477049345] [2021-01-06 09:51:35,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:35,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:51:35,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:51:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:51:36,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:36,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:51:36,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538988242] [2021-01-06 09:51:36,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:51:36,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:36,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:51:36,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:51:36,011 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2021-01-06 09:51:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:36,058 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-01-06 09:51:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:51:36,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 09:51:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:36,060 INFO L225 Difference]: With dead ends: 38 [2021-01-06 09:51:36,060 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 09:51:36,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 09:51:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 09:51:36,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 09:51:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 09:51:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-06 09:51:36,067 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2021-01-06 09:51:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:36,067 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-06 09:51:36,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:51:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-06 09:51:36,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 09:51:36,068 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:36,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:36,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:36,282 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:36,284 INFO L82 PathProgramCache]: Analyzing trace with hash -778322088, now seen corresponding path program 3 times [2021-01-06 09:51:36,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:36,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355352599] [2021-01-06 09:51:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:51:36,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355352599] [2021-01-06 09:51:36,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360107196] [2021-01-06 09:51:36,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:36,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:51:36,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:36,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:51:36,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:51:36,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:36,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:51:36,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473404777] [2021-01-06 09:51:36,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:51:36,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:51:36,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:51:36,463 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2021-01-06 09:51:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:36,521 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-01-06 09:51:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:51:36,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2021-01-06 09:51:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:36,524 INFO L225 Difference]: With dead ends: 43 [2021-01-06 09:51:36,524 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 09:51:36,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 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 09:51:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 09:51:36,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 09:51:36,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 09:51:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-01-06 09:51:36,538 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2021-01-06 09:51:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:36,539 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-01-06 09:51:36,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:51:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-01-06 09:51:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 09:51:36,540 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:36,541 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:36,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:36,757 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:36,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:36,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1736848510, now seen corresponding path program 4 times [2021-01-06 09:51:36,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:36,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784800488] [2021-01-06 09:51:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 09:51:36,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784800488] [2021-01-06 09:51:36,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896347168] [2021-01-06 09:51:36,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:36,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:51:36,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:36,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:51:36,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 09:51:36,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:36,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:51:36,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048797801] [2021-01-06 09:51:36,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:51:36,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:36,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:51:36,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:51:36,960 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2021-01-06 09:51:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:37,005 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-01-06 09:51:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:51:37,006 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2021-01-06 09:51:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:37,006 INFO L225 Difference]: With dead ends: 48 [2021-01-06 09:51:37,007 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 09:51:37,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:51:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 09:51:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 09:51:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 09:51:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-01-06 09:51:37,013 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2021-01-06 09:51:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:37,013 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-01-06 09:51:37,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:51:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-01-06 09:51:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 09:51:37,014 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:37,015 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:37,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:37,230 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:37,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:37,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1884156648, now seen corresponding path program 5 times [2021-01-06 09:51:37,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:37,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290925621] [2021-01-06 09:51:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 09:51:37,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290925621] [2021-01-06 09:51:37,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762732080] [2021-01-06 09:51:37,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:37,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 09:51:37,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:37,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:51:37,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 09:51:37,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:37,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:51:37,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029445077] [2021-01-06 09:51:37,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:51:37,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:37,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:51:37,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:51:37,732 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2021-01-06 09:51:37,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:37,786 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-01-06 09:51:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:51:37,787 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2021-01-06 09:51:37,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:37,787 INFO L225 Difference]: With dead ends: 53 [2021-01-06 09:51:37,788 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:51:37,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:51:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:51:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 09:51:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 09:51:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-01-06 09:51:37,793 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2021-01-06 09:51:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:37,794 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-01-06 09:51:37,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:51:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-01-06 09:51:37,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:51:37,795 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:37,795 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:38,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:51:38,009 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:38,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:38,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1909780030, now seen corresponding path program 6 times [2021-01-06 09:51:38,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:38,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737544372] [2021-01-06 09:51:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-01-06 09:51:38,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737544372] [2021-01-06 09:51:38,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838655673] [2021-01-06 09:51:38,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:38,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 09:51:38,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:38,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:51:38,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-01-06 09:51:38,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:38,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:51:38,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833181154] [2021-01-06 09:51:38,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:51:38,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:38,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:51:38,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:51:38,338 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2021-01-06 09:51:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:38,404 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-01-06 09:51:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:51:38,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2021-01-06 09:51:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:38,405 INFO L225 Difference]: With dead ends: 58 [2021-01-06 09:51:38,405 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 09:51:38,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 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 09:51:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 09:51:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 09:51:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 09:51:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-01-06 09:51:38,411 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2021-01-06 09:51:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:38,411 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-01-06 09:51:38,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:51:38,412 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-01-06 09:51:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 09:51:38,413 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:38,413 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:38,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:38,627 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:38,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:38,628 INFO L82 PathProgramCache]: Analyzing trace with hash -571143464, now seen corresponding path program 7 times [2021-01-06 09:51:38,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:38,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593677571] [2021-01-06 09:51:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 09:51:38,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593677571] [2021-01-06 09:51:38,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565784967] [2021-01-06 09:51:38,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:38,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:51:38,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 09:51:38,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:38,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:51:38,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994951928] [2021-01-06 09:51:38,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:51:38,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:38,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:51:38,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:51:38,864 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2021-01-06 09:51:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:38,923 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-01-06 09:51:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:51:38,924 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2021-01-06 09:51:38,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:38,924 INFO L225 Difference]: With dead ends: 63 [2021-01-06 09:51:38,924 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 09:51:38,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 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 09:51:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 09:51:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 09:51:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 09:51:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-01-06 09:51:38,930 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-01-06 09:51:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:38,931 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-01-06 09:51:38,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:51:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-01-06 09:51:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 09:51:38,932 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:38,932 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:39,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:39,148 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:39,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1115371518, now seen corresponding path program 8 times [2021-01-06 09:51:39,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:39,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735145289] [2021-01-06 09:51:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:51:39,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735145289] [2021-01-06 09:51:39,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778093926] [2021-01-06 09:51:39,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:39,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:51:39,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:39,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:51:39,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:51:39,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:39,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:51:39,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664021387] [2021-01-06 09:51:39,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:51:39,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:39,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:51:39,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:51:39,433 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2021-01-06 09:51:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:39,495 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-01-06 09:51:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:51:39,495 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2021-01-06 09:51:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:39,496 INFO L225 Difference]: With dead ends: 68 [2021-01-06 09:51:39,496 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 09:51:39,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:51:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 09:51:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 09:51:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 09:51:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-01-06 09:51:39,503 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2021-01-06 09:51:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:39,503 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-01-06 09:51:39,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:51:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-01-06 09:51:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 09:51:39,504 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:39,505 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:39,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:51:39,719 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:39,721 INFO L82 PathProgramCache]: Analyzing trace with hash -953894760, now seen corresponding path program 9 times [2021-01-06 09:51:39,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:39,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394010335] [2021-01-06 09:51:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-01-06 09:51:39,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394010335] [2021-01-06 09:51:39,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893032216] [2021-01-06 09:51:39,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:40,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:51:40,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:40,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:51:40,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-01-06 09:51:40,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:40,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:51:40,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863355544] [2021-01-06 09:51:40,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:51:40,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:40,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:51:40,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:51:40,711 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2021-01-06 09:51:40,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:40,768 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-01-06 09:51:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:51:40,769 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2021-01-06 09:51:40,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:40,769 INFO L225 Difference]: With dead ends: 73 [2021-01-06 09:51:40,769 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:51:40,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:51:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:51:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 09:51:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:51:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-01-06 09:51:40,775 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2021-01-06 09:51:40,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:40,775 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-01-06 09:51:40,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:51:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-01-06 09:51:40,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:51:40,776 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:40,777 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:40,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:40,991 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:40,993 INFO L82 PathProgramCache]: Analyzing trace with hash -468119106, now seen corresponding path program 10 times [2021-01-06 09:51:40,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:40,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253213437] [2021-01-06 09:51:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-01-06 09:51:41,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253213437] [2021-01-06 09:51:41,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392506177] [2021-01-06 09:51:41,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:41,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:51:41,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:41,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:51:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-01-06 09:51:41,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:41,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:51:41,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680496878] [2021-01-06 09:51:41,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:51:41,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:41,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:51:41,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:51:41,289 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2021-01-06 09:51:41,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:41,370 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-01-06 09:51:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:51:41,370 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2021-01-06 09:51:41,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:41,371 INFO L225 Difference]: With dead ends: 78 [2021-01-06 09:51:41,372 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 09:51:41,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:51:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 09:51:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 09:51:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 09:51:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-01-06 09:51:41,378 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2021-01-06 09:51:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:41,379 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-01-06 09:51:41,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:51:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-01-06 09:51:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 09:51:41,380 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:41,380 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:41,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:41,595 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:41,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1291774376, now seen corresponding path program 11 times [2021-01-06 09:51:41,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:41,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667278940] [2021-01-06 09:51:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-01-06 09:51:41,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667278940] [2021-01-06 09:51:41,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542992544] [2021-01-06 09:51:41,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:45,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 09:51:45,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:45,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:51:45,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-01-06 09:51:45,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:45,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:51:45,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870794760] [2021-01-06 09:51:45,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:51:45,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:45,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:51:45,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:51:45,610 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2021-01-06 09:51:45,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:45,705 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-01-06 09:51:45,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:51:45,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2021-01-06 09:51:45,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:45,706 INFO L225 Difference]: With dead ends: 83 [2021-01-06 09:51:45,706 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 09:51:45,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:51:45,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 09:51:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 09:51:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 09:51:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-01-06 09:51:45,729 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2021-01-06 09:51:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:45,729 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-01-06 09:51:45,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:51:45,730 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-01-06 09:51:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 09:51:45,731 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:45,731 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:45,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:51:45,945 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:45,946 INFO L82 PathProgramCache]: Analyzing trace with hash 340687742, now seen corresponding path program 12 times [2021-01-06 09:51:45,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:45,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598647150] [2021-01-06 09:51:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-01-06 09:51:46,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598647150] [2021-01-06 09:51:46,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963341722] [2021-01-06 09:51:46,140 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 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 09:51:48,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:51:48,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:48,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:51:48,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-01-06 09:51:48,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:48,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:51:48,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554021548] [2021-01-06 09:51:48,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:51:48,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:48,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:51:48,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:51:48,261 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2021-01-06 09:51:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:48,331 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-01-06 09:51:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:51:48,332 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2021-01-06 09:51:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:48,333 INFO L225 Difference]: With dead ends: 88 [2021-01-06 09:51:48,333 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 09:51:48,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 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 09:51:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 09:51:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-01-06 09:51:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 09:51:48,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-01-06 09:51:48,338 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2021-01-06 09:51:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:48,338 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-01-06 09:51:48,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:51:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-01-06 09:51:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 09:51:48,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:48,340 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:48,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:51:48,555 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:48,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:48,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1716134936, now seen corresponding path program 13 times [2021-01-06 09:51:48,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:48,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853437814] [2021-01-06 09:51:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 09:51:48,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853437814] [2021-01-06 09:51:48,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706139305] [2021-01-06 09:51:48,730 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 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 09:51:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:48,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:51:48,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 09:51:48,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:48,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:51:48,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643436528] [2021-01-06 09:51:48,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:51:48,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:48,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:51:48,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:51:48,898 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2021-01-06 09:51:48,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:48,994 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-01-06 09:51:48,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:51:48,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2021-01-06 09:51:48,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:48,995 INFO L225 Difference]: With dead ends: 93 [2021-01-06 09:51:48,995 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:51:48,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 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 09:51:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:51:49,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-06 09:51:49,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 09:51:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-01-06 09:51:49,001 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 50 [2021-01-06 09:51:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:49,001 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-01-06 09:51:49,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:51:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-01-06 09:51:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:51:49,002 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:49,003 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:49,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:51:49,216 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:49,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:49,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1136358718, now seen corresponding path program 14 times [2021-01-06 09:51:49,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:49,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355116958] [2021-01-06 09:51:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:51:49,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355116958] [2021-01-06 09:51:49,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045560299] [2021-01-06 09:51:49,468 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 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 09:51:49,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:51:49,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:49,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:51:49,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:51:49,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:49,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:51:49,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749490206] [2021-01-06 09:51:49,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:51:49,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:49,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:51:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:51:49,614 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 18 states. [2021-01-06 09:51:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:49,704 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2021-01-06 09:51:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:51:49,704 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2021-01-06 09:51:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:49,705 INFO L225 Difference]: With dead ends: 98 [2021-01-06 09:51:49,705 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 09:51:49,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:51:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 09:51:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-06 09:51:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 09:51:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-01-06 09:51:49,710 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2021-01-06 09:51:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:49,711 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-01-06 09:51:49,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:51:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-01-06 09:51:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 09:51:49,711 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:49,712 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:49,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:51:49,926 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:49,926 INFO L82 PathProgramCache]: Analyzing trace with hash 46129624, now seen corresponding path program 15 times [2021-01-06 09:51:49,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:49,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917352132] [2021-01-06 09:51:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-01-06 09:51:50,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917352132] [2021-01-06 09:51:50,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338603087] [2021-01-06 09:51:50,153 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 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 09:51:57,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:51:57,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:51:57,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-01-06 09:51:57,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:57,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:51:57,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024937583] [2021-01-06 09:51:57,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:51:57,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:57,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:51:57,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:51:57,594 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 19 states. [2021-01-06 09:51:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:57,690 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-01-06 09:51:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:51:57,691 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2021-01-06 09:51:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:57,692 INFO L225 Difference]: With dead ends: 103 [2021-01-06 09:51:57,692 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 09:51:57,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 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 09:51:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 09:51:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-01-06 09:51:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 09:51:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-01-06 09:51:57,697 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 56 [2021-01-06 09:51:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:57,697 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-01-06 09:51:57,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:51:57,697 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-01-06 09:51:57,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 09:51:57,698 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:57,698 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:57,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:51:57,912 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1778385154, now seen corresponding path program 16 times [2021-01-06 09:51:57,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:57,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850432415] [2021-01-06 09:51:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-01-06 09:51:58,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850432415] [2021-01-06 09:51:58,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739958190] [2021-01-06 09:51:58,176 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 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 09:51:58,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:51:58,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:58,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:51:58,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-01-06 09:51:58,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:58,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:51:58,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610322856] [2021-01-06 09:51:58,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:51:58,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:58,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:51:58,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:51:58,341 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 20 states. [2021-01-06 09:51:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:58,454 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-01-06 09:51:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:51:58,455 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2021-01-06 09:51:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:58,455 INFO L225 Difference]: With dead ends: 108 [2021-01-06 09:51:58,456 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 09:51:58,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:51:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 09:51:58,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-01-06 09:51:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 09:51:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-01-06 09:51:58,460 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2021-01-06 09:51:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:58,461 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-01-06 09:51:58,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:51:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-01-06 09:51:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 09:51:58,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:58,462 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:58,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:51:58,675 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:58,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:58,676 INFO L82 PathProgramCache]: Analyzing trace with hash 119689112, now seen corresponding path program 17 times [2021-01-06 09:51:58,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:58,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327753511] [2021-01-06 09:51:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-01-06 09:51:58,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327753511] [2021-01-06 09:51:58,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517711697] [2021-01-06 09:51:58,907 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 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