/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_password_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:56:58,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:56:58,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:56:58,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:56:58,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:56:58,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:56:58,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:56:58,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:56:58,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:56:58,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:56:58,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:56:58,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:56:58,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:56:58,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:56:58,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:56:58,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:56:58,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:56:58,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:56:58,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:56:58,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:56:58,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:56:58,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:56:58,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:56:58,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:56:58,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:56:58,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:56:58,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:56:58,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:56:58,410 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 09:56:58,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:56:58,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:56:58,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:56:58,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:56:58,464 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:56:58,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:56:58,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:56:58,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:56:58,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:56:58,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:56:58,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:56:58,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:56:58,466 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:56:58,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:56:58,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:56:58,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:56:58,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:56:58,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:56:58,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:56:58,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:56:58,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:56:58,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:56:58,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:56:58,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:56:58,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:56:58,468 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:56:58,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:56:58,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:56:58,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:56:58,965 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:56:58,966 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:56:58,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_password_ground.i [2021-01-06 09:56:59,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4202b25cc/bfe9b6b9c0844dd89158d1307ee901c9/FLAGf5efa4992 [2021-01-06 09:56:59,667 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:56:59,668 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_password_ground.i [2021-01-06 09:56:59,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4202b25cc/bfe9b6b9c0844dd89158d1307ee901c9/FLAGf5efa4992 [2021-01-06 09:56:59,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4202b25cc/bfe9b6b9c0844dd89158d1307ee901c9 [2021-01-06 09:56:59,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:56:59,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:56:59,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:56:59,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:56:59,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:56:59,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:56:59" (1/1) ... [2021-01-06 09:56:59,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c8925c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:59, skipping insertion in model container [2021-01-06 09:56:59,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:56:59" (1/1) ... [2021-01-06 09:57:00,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:57:00,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:57:00,239 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_password_ground.i[817,830] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~password~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~guess~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~result~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:57:00,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:57:00,269 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:57:00,284 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_password_ground.i[817,830] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#password~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#password~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#guess~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#guess~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[~result~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:57:00,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:57:00,308 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:57:00,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00 WrapperNode [2021-01-06 09:57:00,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:57:00,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:57:00,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:57:00,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:57:00,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00" (1/1) ... [2021-01-06 09:57:00,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00" (1/1) ... [2021-01-06 09:57:00,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:57:00,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:57:00,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:57:00,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:57:00,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00" (1/1) ... [2021-01-06 09:57:00,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00" (1/1) ... [2021-01-06 09:57:00,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00" (1/1) ... [2021-01-06 09:57:00,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00" (1/1) ... [2021-01-06 09:57:00,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00" (1/1) ... [2021-01-06 09:57:00,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00" (1/1) ... [2021-01-06 09:57:00,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00" (1/1) ... [2021-01-06 09:57:00,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:57:00,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:57:00,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:57:00,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:57:00,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00" (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 09:57:00,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:57:00,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:57:00,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:57:00,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:57:00,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:57:00,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:57:00,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:57:00,785 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:57:00,785 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 09:57:00,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:57:00 BoogieIcfgContainer [2021-01-06 09:57:00,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:57:00,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:57:00,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:57:00,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:57:00,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:56:59" (1/3) ... [2021-01-06 09:57:00,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df0abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:57:00, skipping insertion in model container [2021-01-06 09:57:00,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:00" (2/3) ... [2021-01-06 09:57:00,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df0abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:57:00, skipping insertion in model container [2021-01-06 09:57:00,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:57:00" (3/3) ... [2021-01-06 09:57:00,797 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_password_ground.i [2021-01-06 09:57:00,804 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:57:00,809 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:57:00,832 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:57:00,938 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:57:00,938 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:57:00,938 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:57:00,938 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:57:00,939 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:57:00,939 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:57:00,939 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:57:00,939 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:57:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-01-06 09:57:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:57:00,975 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:00,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:00,977 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:00,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:00,988 INFO L82 PathProgramCache]: Analyzing trace with hash -2006075616, now seen corresponding path program 1 times [2021-01-06 09:57:00,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:00,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084190853] [2021-01-06 09:57:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:01,185 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 09:57:01,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084190853] [2021-01-06 09:57:01,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:57:01,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 09:57:01,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609573780] [2021-01-06 09:57:01,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 09:57:01,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:01,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 09:57:01,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 09:57:01,219 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2021-01-06 09:57:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:01,238 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2021-01-06 09:57:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 09:57:01,240 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 09:57:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:01,249 INFO L225 Difference]: With dead ends: 34 [2021-01-06 09:57:01,249 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 09:57:01,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 09:57:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 09:57:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 09:57:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 09:57:01,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-01-06 09:57:01,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-01-06 09:57:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:01,289 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-01-06 09:57:01,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 09:57:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-01-06 09:57:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:57:01,290 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:01,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:01,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:57:01,291 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:01,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2016234347, now seen corresponding path program 1 times [2021-01-06 09:57:01,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:01,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226912894] [2021-01-06 09:57:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:01,347 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 09:57:01,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226912894] [2021-01-06 09:57:01,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:57:01,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:57:01,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918472774] [2021-01-06 09:57:01,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:57:01,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:01,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:57:01,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:57:01,351 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2021-01-06 09:57:01,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:01,403 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-01-06 09:57:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:57:01,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 09:57:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:01,404 INFO L225 Difference]: With dead ends: 31 [2021-01-06 09:57:01,405 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 09:57:01,406 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 09:57:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 09:57:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-01-06 09:57:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 09:57:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-01-06 09:57:01,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2021-01-06 09:57:01,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:01,418 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-01-06 09:57:01,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:57:01,419 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-01-06 09:57:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 09:57:01,419 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:01,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:01,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 09:57:01,420 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:01,421 INFO L82 PathProgramCache]: Analyzing trace with hash -324076335, now seen corresponding path program 1 times [2021-01-06 09:57:01,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:01,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395565223] [2021-01-06 09:57:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:57:01,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395565223] [2021-01-06 09:57:01,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732984051] [2021-01-06 09:57:01,505 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 09:57:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:01,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:57:01,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:57:01,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:57:01,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:57:01,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722410834] [2021-01-06 09:57:01,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:57:01,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:01,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:57:01,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:57:01,635 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2021-01-06 09:57:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:01,646 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-01-06 09:57:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:57:01,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 09:57:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:01,647 INFO L225 Difference]: With dead ends: 27 [2021-01-06 09:57:01,647 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 09:57:01,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:57:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 09:57:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 09:57:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 09:57:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 09:57:01,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-01-06 09:57:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:01,653 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 09:57:01,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:57:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 09:57:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 09:57:01,654 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:01,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:01,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 09:57:01,860 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:01,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1450931027, now seen corresponding path program 1 times [2021-01-06 09:57:01,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:01,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8232456] [2021-01-06 09:57:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:57:01,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8232456] [2021-01-06 09:57:01,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606156633] [2021-01-06 09:57:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:01,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:57:01,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:57:02,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:02,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:57:02,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559980468] [2021-01-06 09:57:02,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:57:02,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:02,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:57:02,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:57:02,040 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2021-01-06 09:57:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:02,079 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-01-06 09:57:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:57:02,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 09:57:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:02,081 INFO L225 Difference]: With dead ends: 37 [2021-01-06 09:57:02,081 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 09:57:02,082 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 09:57:02,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 09:57:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-01-06 09:57:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 09:57:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 09:57:02,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2021-01-06 09:57:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:02,088 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 09:57:02,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:57:02,088 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 09:57:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 09:57:02,089 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:02,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:02,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:02,305 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:02,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1177321199, now seen corresponding path program 2 times [2021-01-06 09:57:02,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:02,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828043859] [2021-01-06 09:57:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:57:02,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828043859] [2021-01-06 09:57:02,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484877214] [2021-01-06 09:57:02,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:02,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:02,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:02,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:57:02,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:57:02,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:02,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:57:02,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311010221] [2021-01-06 09:57:02,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:57:02,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:02,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:57:02,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:57:02,547 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2021-01-06 09:57:02,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:02,626 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-01-06 09:57:02,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:57:02,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-01-06 09:57:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:02,630 INFO L225 Difference]: With dead ends: 45 [2021-01-06 09:57:02,631 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 09:57:02,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 09:57:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 09:57:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-01-06 09:57:02,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 09:57:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-01-06 09:57:02,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2021-01-06 09:57:02,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:02,651 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-01-06 09:57:02,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:57:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-01-06 09:57:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 09:57:02,653 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:02,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:02,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:02,854 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:02,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1757833943, now seen corresponding path program 3 times [2021-01-06 09:57:02,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:02,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310173188] [2021-01-06 09:57:02,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:57:02,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310173188] [2021-01-06 09:57:02,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354073044] [2021-01-06 09:57:02,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:03,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:57:03,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:03,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:57:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 09:57:03,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:03,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-01-06 09:57:03,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673360395] [2021-01-06 09:57:03,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:57:03,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:03,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:57:03,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:57:03,172 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 12 states. [2021-01-06 09:57:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:03,394 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-01-06 09:57:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:57:03,395 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2021-01-06 09:57:03,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:03,396 INFO L225 Difference]: With dead ends: 58 [2021-01-06 09:57:03,396 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 09:57:03,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-01-06 09:57:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 09:57:03,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-01-06 09:57:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:57:03,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-01-06 09:57:03,404 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2021-01-06 09:57:03,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:03,404 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-01-06 09:57:03,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:57:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-01-06 09:57:03,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:57:03,405 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:03,406 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:03,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:03,621 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:03,622 INFO L82 PathProgramCache]: Analyzing trace with hash -986484797, now seen corresponding path program 1 times [2021-01-06 09:57:03,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:03,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887208162] [2021-01-06 09:57:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 09:57:03,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887208162] [2021-01-06 09:57:03,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625972346] [2021-01-06 09:57:03,771 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 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 09:57:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:03,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:57:03,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 09:57:03,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:03,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:57:03,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460930352] [2021-01-06 09:57:03,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:57:03,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:03,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:57:03,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:57:03,959 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2021-01-06 09:57:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:04,024 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-01-06 09:57:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:57:04,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2021-01-06 09:57:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:04,025 INFO L225 Difference]: With dead ends: 65 [2021-01-06 09:57:04,025 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 09:57:04,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 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 09:57:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 09:57:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-01-06 09:57:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 09:57:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-01-06 09:57:04,036 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2021-01-06 09:57:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:04,036 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-01-06 09:57:04,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:57:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-01-06 09:57:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 09:57:04,038 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:04,038 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:04,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 09:57:04,253 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:04,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1169210769, now seen corresponding path program 2 times [2021-01-06 09:57:04,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:04,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171771854] [2021-01-06 09:57:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 09:57:04,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171771854] [2021-01-06 09:57:04,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840534816] [2021-01-06 09:57:04,400 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 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 09:57:04,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:04,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:04,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:57:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 09:57:04,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:04,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:57:04,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037894348] [2021-01-06 09:57:04,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:57:04,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:04,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:57:04,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:57:04,581 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 9 states. [2021-01-06 09:57:04,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:04,676 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-01-06 09:57:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:57:04,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2021-01-06 09:57:04,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:04,678 INFO L225 Difference]: With dead ends: 73 [2021-01-06 09:57:04,678 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 09:57:04,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 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 09:57:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 09:57:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-01-06 09:57:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:57:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-01-06 09:57:04,697 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 38 [2021-01-06 09:57:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:04,697 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-01-06 09:57:04,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:57:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-01-06 09:57:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 09:57:04,703 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:04,703 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:04,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:04,917 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:04,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:04,918 INFO L82 PathProgramCache]: Analyzing trace with hash -6803905, now seen corresponding path program 3 times [2021-01-06 09:57:04,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:04,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79890982] [2021-01-06 09:57:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-01-06 09:57:05,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79890982] [2021-01-06 09:57:05,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514576123] [2021-01-06 09:57:05,037 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 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 09:57:05,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:57:05,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:05,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 09:57:05,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 09:57:05,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:05,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-01-06 09:57:05,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074238257] [2021-01-06 09:57:05,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:57:05,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:05,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:57:05,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:57:05,558 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 20 states. [2021-01-06 09:57:06,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:06,040 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-01-06 09:57:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 09:57:06,040 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2021-01-06 09:57:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:06,045 INFO L225 Difference]: With dead ends: 88 [2021-01-06 09:57:06,045 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 09:57:06,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:57:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 09:57:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-01-06 09:57:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 09:57:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-01-06 09:57:06,070 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 43 [2021-01-06 09:57:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:06,071 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-01-06 09:57:06,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:57:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-01-06 09:57:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 09:57:06,075 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:06,075 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:06,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:06,276 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:06,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1830402379, now seen corresponding path program 4 times [2021-01-06 09:57:06,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:06,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774633633] [2021-01-06 09:57:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 09:57:06,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774633633] [2021-01-06 09:57:06,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704683106] [2021-01-06 09:57:06,423 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 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 09:57:06,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:57:06,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:06,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:57:06,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 09:57:06,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:06,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:57:06,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804953373] [2021-01-06 09:57:06,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:57:06,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:06,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:57:06,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:57:06,561 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 11 states. [2021-01-06 09:57:06,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:06,643 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2021-01-06 09:57:06,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:57:06,644 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2021-01-06 09:57:06,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:06,645 INFO L225 Difference]: With dead ends: 97 [2021-01-06 09:57:06,645 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 09:57:06,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 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 09:57:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 09:57:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-01-06 09:57:06,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 09:57:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-01-06 09:57:06,652 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 52 [2021-01-06 09:57:06,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:06,653 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-01-06 09:57:06,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:57:06,653 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-01-06 09:57:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 09:57:06,654 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:06,654 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:06,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 09:57:06,868 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:06,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1242544143, now seen corresponding path program 5 times [2021-01-06 09:57:06,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:06,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966564435] [2021-01-06 09:57:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:57:06,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966564435] [2021-01-06 09:57:06,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448590087] [2021-01-06 09:57:06,996 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 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 09:57:07,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 09:57:07,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:57:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:57:08,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:08,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:57:08,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148962332] [2021-01-06 09:57:08,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:57:08,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:08,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:57:08,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:57:08,084 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 12 states. [2021-01-06 09:57:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:08,171 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-01-06 09:57:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:57:08,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2021-01-06 09:57:08,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:08,172 INFO L225 Difference]: With dead ends: 105 [2021-01-06 09:57:08,173 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 09:57:08,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 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 09:57:08,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 09:57:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-01-06 09:57:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 09:57:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-01-06 09:57:08,180 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2021-01-06 09:57:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:08,181 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-01-06 09:57:08,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:57:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-01-06 09:57:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 09:57:08,182 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:08,182 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:08,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:08,397 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:08,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:08,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1458951375, now seen corresponding path program 6 times [2021-01-06 09:57:08,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:08,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719117857] [2021-01-06 09:57:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-01-06 09:57:08,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719117857] [2021-01-06 09:57:08,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985947510] [2021-01-06 09:57:08,596 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 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 09:57:08,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 09:57:08,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 09:57:08,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-01-06 09:57:09,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:09,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-01-06 09:57:09,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948933249] [2021-01-06 09:57:09,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:57:09,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:09,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:57:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:57:09,193 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 23 states. [2021-01-06 09:57:09,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:09,945 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2021-01-06 09:57:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 09:57:09,945 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2021-01-06 09:57:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:09,946 INFO L225 Difference]: With dead ends: 120 [2021-01-06 09:57:09,946 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 09:57:09,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=399, Invalid=1407, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 09:57:09,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 09:57:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-01-06 09:57:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 09:57:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-01-06 09:57:09,955 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 62 [2021-01-06 09:57:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:09,956 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-01-06 09:57:09,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:57:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-01-06 09:57:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 09:57:09,957 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:09,957 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:10,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:10,171 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:10,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:10,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1792785757, now seen corresponding path program 7 times [2021-01-06 09:57:10,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:10,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076294010] [2021-01-06 09:57:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-01-06 09:57:10,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076294010] [2021-01-06 09:57:10,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089524275] [2021-01-06 09:57:10,318 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 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 09:57:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:10,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:57:10,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-01-06 09:57:10,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:10,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:57:10,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889316796] [2021-01-06 09:57:10,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:57:10,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:10,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:57:10,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:57:10,502 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 14 states. [2021-01-06 09:57:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:10,605 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-01-06 09:57:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:57:10,605 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2021-01-06 09:57:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:10,606 INFO L225 Difference]: With dead ends: 129 [2021-01-06 09:57:10,607 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 09:57:10,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 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 09:57:10,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 09:57:10,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-01-06 09:57:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 09:57:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-01-06 09:57:10,614 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2021-01-06 09:57:10,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:10,615 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-01-06 09:57:10,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:57:10,615 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-01-06 09:57:10,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 09:57:10,616 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:10,616 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:10,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:57:10,831 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:10,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1017753719, now seen corresponding path program 8 times [2021-01-06 09:57:10,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:10,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017334159] [2021-01-06 09:57:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-01-06 09:57:10,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017334159] [2021-01-06 09:57:10,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725658198] [2021-01-06 09:57:10,983 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 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 09:57:11,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:11,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:11,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:57:11,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-01-06 09:57:11,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:11,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:57:11,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639366740] [2021-01-06 09:57:11,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:57:11,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:11,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:57:11,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:57:11,162 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 15 states. [2021-01-06 09:57:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:11,276 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-01-06 09:57:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:57:11,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2021-01-06 09:57:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:11,277 INFO L225 Difference]: With dead ends: 137 [2021-01-06 09:57:11,278 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 09:57:11,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 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 09:57:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 09:57:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-01-06 09:57:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 09:57:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-01-06 09:57:11,284 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 76 [2021-01-06 09:57:11,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:11,285 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-01-06 09:57:11,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:57:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-01-06 09:57:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 09:57:11,286 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:11,286 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:11,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:57:11,494 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash -525419233, now seen corresponding path program 9 times [2021-01-06 09:57:11,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:11,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116859406] [2021-01-06 09:57:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-01-06 09:57:11,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116859406] [2021-01-06 09:57:11,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914476388] [2021-01-06 09:57:11,677 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 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 09:57:12,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 09:57:12,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:12,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 09:57:12,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-01-06 09:57:12,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:12,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-01-06 09:57:12,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976226856] [2021-01-06 09:57:12,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 09:57:12,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 09:57:12,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:57:12,785 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2021-01-06 09:57:13,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:13,882 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2021-01-06 09:57:13,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 09:57:13,883 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2021-01-06 09:57:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:13,884 INFO L225 Difference]: With dead ends: 152 [2021-01-06 09:57:13,884 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 09:57:13,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 09:57:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 09:57:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2021-01-06 09:57:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 09:57:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2021-01-06 09:57:13,892 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 81 [2021-01-06 09:57:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:13,893 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2021-01-06 09:57:13,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 09:57:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2021-01-06 09:57:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 09:57:13,894 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:13,894 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:14,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 09:57:14,109 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:14,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1510198461, now seen corresponding path program 10 times [2021-01-06 09:57:14,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:14,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512255032] [2021-01-06 09:57:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-01-06 09:57:14,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512255032] [2021-01-06 09:57:14,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343774809] [2021-01-06 09:57:14,304 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 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 09:57:14,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:57:14,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:57:14,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-01-06 09:57:14,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:14,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:57:14,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887620635] [2021-01-06 09:57:14,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:57:14,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:14,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:57:14,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:57:14,513 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 17 states. [2021-01-06 09:57:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:14,657 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2021-01-06 09:57:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:57:14,660 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 90 [2021-01-06 09:57:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:14,661 INFO L225 Difference]: With dead ends: 161 [2021-01-06 09:57:14,661 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 09:57:14,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 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 09:57:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 09:57:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-01-06 09:57:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 09:57:14,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-01-06 09:57:14,668 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 90 [2021-01-06 09:57:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:14,668 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-01-06 09:57:14,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:57:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-01-06 09:57:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 09:57:14,670 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:14,670 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:14,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:14,879 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:14,880 INFO L82 PathProgramCache]: Analyzing trace with hash -658545967, now seen corresponding path program 11 times [2021-01-06 09:57:14,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:14,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910434304] [2021-01-06 09:57:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-01-06 09:57:15,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910434304] [2021-01-06 09:57:15,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470570327] [2021-01-06 09:57:15,096 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 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 09:57:19,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-01-06 09:57:19,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:20,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:57:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-01-06 09:57:20,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:20,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:57:20,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224786044] [2021-01-06 09:57:20,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:57:20,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:20,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:57:20,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:57:20,148 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 18 states. [2021-01-06 09:57:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:20,292 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2021-01-06 09:57:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:57:20,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2021-01-06 09:57:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:20,294 INFO L225 Difference]: With dead ends: 169 [2021-01-06 09:57:20,294 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 09:57:20,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 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 09:57:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 09:57:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2021-01-06 09:57:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 09:57:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-01-06 09:57:20,310 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2021-01-06 09:57:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:20,311 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-01-06 09:57:20,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:57:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-01-06 09:57:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 09:57:20,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:20,313 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:20,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:57:20,527 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:20,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1660177721, now seen corresponding path program 12 times [2021-01-06 09:57:20,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:20,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318923334] [2021-01-06 09:57:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-01-06 09:57:20,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318923334] [2021-01-06 09:57:20,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559327065] [2021-01-06 09:57:20,771 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 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 09:57:21,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-01-06 09:57:21,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:21,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 09:57:21,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-01-06 09:57:22,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:22,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-01-06 09:57:22,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461329865] [2021-01-06 09:57:22,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 09:57:22,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:22,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 09:57:22,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:57:22,562 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2021-01-06 09:57:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:24,060 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2021-01-06 09:57:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 09:57:24,061 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2021-01-06 09:57:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:24,062 INFO L225 Difference]: With dead ends: 184 [2021-01-06 09:57:24,062 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 09:57:24,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1003, Invalid=3287, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 09:57:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 09:57:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2021-01-06 09:57:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 09:57:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-01-06 09:57:24,072 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 100 [2021-01-06 09:57:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:24,072 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-01-06 09:57:24,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 09:57:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-01-06 09:57:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-06 09:57:24,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:24,076 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:24,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:57:24,292 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:24,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1782896253, now seen corresponding path program 13 times [2021-01-06 09:57:24,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:24,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144264304] [2021-01-06 09:57:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-01-06 09:57:24,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144264304] [2021-01-06 09:57:24,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929458576] [2021-01-06 09:57:24,544 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:57:24,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-01-06 09:57:24,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:24,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:57:24,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797391826] [2021-01-06 09:57:24,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:57:24,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:24,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:57:24,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:57:24,794 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 20 states. [2021-01-06 09:57:24,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:24,964 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2021-01-06 09:57:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:57:24,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2021-01-06 09:57:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:24,966 INFO L225 Difference]: With dead ends: 193 [2021-01-06 09:57:24,966 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 09:57:24,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 109 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 09:57:24,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 09:57:24,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2021-01-06 09:57:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 09:57:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2021-01-06 09:57:24,974 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 109 [2021-01-06 09:57:24,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:24,974 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2021-01-06 09:57:24,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:57:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2021-01-06 09:57:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-01-06 09:57:24,975 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:24,975 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:25,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:25,189 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash 814388609, now seen corresponding path program 14 times [2021-01-06 09:57:25,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:25,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186391407] [2021-01-06 09:57:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2021-01-06 09:57:25,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186391407] [2021-01-06 09:57:25,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336781670] [2021-01-06 09:57:25,482 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:25,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:25,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:25,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:57:25,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2021-01-06 09:57:25,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:25,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 09:57:25,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77256762] [2021-01-06 09:57:25,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:57:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:57:25,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:57:25,804 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 21 states. [2021-01-06 09:57:26,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:26,018 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2021-01-06 09:57:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 09:57:26,019 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 114 [2021-01-06 09:57:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:26,021 INFO L225 Difference]: With dead ends: 201 [2021-01-06 09:57:26,021 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 09:57:26,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:57:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 09:57:26,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2021-01-06 09:57:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 09:57:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-01-06 09:57:26,034 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 114 [2021-01-06 09:57:26,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:26,035 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-01-06 09:57:26,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:57:26,035 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-01-06 09:57:26,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 09:57:26,037 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:26,038 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:26,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:26,252 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:26,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:26,252 INFO L82 PathProgramCache]: Analyzing trace with hash -701947905, now seen corresponding path program 15 times [2021-01-06 09:57:26,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:26,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453330477] [2021-01-06 09:57:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2021-01-06 09:57:26,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453330477] [2021-01-06 09:57:26,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256906612] [2021-01-06 09:57:26,598 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:31,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 09:57:31,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:31,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 09:57:31,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:31,111 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 09:57:31,114 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,122 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:31,123 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,123 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2021-01-06 09:57:31,198 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-01-06 09:57:31,199 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,211 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:31,213 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,214 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:11 [2021-01-06 09:57:31,226 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-01-06 09:57:31,227 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,236 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:31,238 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,239 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:11 [2021-01-06 09:57:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2021-01-06 09:57:31,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:31,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-01-06 09:57:31,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669465329] [2021-01-06 09:57:31,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 09:57:31,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:31,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 09:57:31,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1040, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:57:31,905 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 38 states. [2021-01-06 09:57:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:33,845 INFO L93 Difference]: Finished difference Result 216 states and 222 transitions. [2021-01-06 09:57:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 09:57:33,846 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 119 [2021-01-06 09:57:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:33,847 INFO L225 Difference]: With dead ends: 216 [2021-01-06 09:57:33,847 INFO L226 Difference]: Without dead ends: 135 [2021-01-06 09:57:33,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1068, Invalid=3762, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 09:57:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-01-06 09:57:33,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2021-01-06 09:57:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 09:57:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2021-01-06 09:57:33,859 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 119 [2021-01-06 09:57:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:33,860 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2021-01-06 09:57:33,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 09:57:33,860 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2021-01-06 09:57:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-01-06 09:57:33,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:33,861 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:34,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:34,074 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:34,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:34,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1370119877, now seen corresponding path program 16 times [2021-01-06 09:57:34,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:34,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348311197] [2021-01-06 09:57:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-01-06 09:57:34,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348311197] [2021-01-06 09:57:34,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684074353] [2021-01-06 09:57:34,398 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:34,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:57:34,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:34,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:57:34,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-01-06 09:57:34,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:34,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:57:34,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983173744] [2021-01-06 09:57:34,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:57:34,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:57:34,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:57:34,753 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 23 states. [2021-01-06 09:57:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:34,933 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2021-01-06 09:57:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:57:34,933 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 128 [2021-01-06 09:57:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:34,935 INFO L225 Difference]: With dead ends: 225 [2021-01-06 09:57:34,935 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 09:57:34,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:57:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 09:57:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2021-01-06 09:57:34,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 09:57:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2021-01-06 09:57:34,944 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 128 [2021-01-06 09:57:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:34,944 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2021-01-06 09:57:34,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:57:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2021-01-06 09:57:34,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-01-06 09:57:34,946 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:34,946 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:35,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:57:35,160 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:35,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1296437681, now seen corresponding path program 17 times [2021-01-06 09:57:35,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:35,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157545870] [2021-01-06 09:57:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2021-01-06 09:57:35,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157545870] [2021-01-06 09:57:35,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928964856] [2021-01-06 09:57:35,515 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:04,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 09:58:04,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:58:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:58:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:58:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2021-01-06 09:58:04,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:58:04,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 09:58:04,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251908890] [2021-01-06 09:58:04,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:58:04,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:58:04,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:58:04,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:58:04,411 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 24 states. [2021-01-06 09:58:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:58:04,575 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2021-01-06 09:58:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:58:04,580 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 133 [2021-01-06 09:58:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:58:04,581 INFO L225 Difference]: With dead ends: 233 [2021-01-06 09:58:04,581 INFO L226 Difference]: Without dead ends: 142 [2021-01-06 09:58:04,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:58:04,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-01-06 09:58:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2021-01-06 09:58:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 09:58:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2021-01-06 09:58:04,590 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 133 [2021-01-06 09:58:04,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:58:04,590 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2021-01-06 09:58:04,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:58:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2021-01-06 09:58:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 09:58:04,592 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:58:04,592 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:58:04,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 09:58:04,801 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:58:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:58:04,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1501903681, now seen corresponding path program 18 times [2021-01-06 09:58:04,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:58:04,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34186562] [2021-01-06 09:58:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:58:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2021-01-06 09:58:05,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34186562] [2021-01-06 09:58:05,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300176854] [2021-01-06 09:58:05,178 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:11,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-01-06 09:58:11,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:58:11,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 09:58:11,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:58:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 0 proven. 422 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2021-01-06 09:58:12,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:58:12,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-01-06 09:58:12,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903683770] [2021-01-06 09:58:12,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 09:58:12,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:58:12,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 09:58:12,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1454, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 09:58:12,815 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 45 states. [2021-01-06 09:58:15,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:58:15,152 INFO L93 Difference]: Finished difference Result 248 states and 254 transitions. [2021-01-06 09:58:15,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 09:58:15,153 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 138 [2021-01-06 09:58:15,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:58:15,154 INFO L225 Difference]: With dead ends: 248 [2021-01-06 09:58:15,154 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 09:58:15,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1718, Invalid=5592, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 09:58:15,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 09:58:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2021-01-06 09:58:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2021-01-06 09:58:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2021-01-06 09:58:15,166 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 138 [2021-01-06 09:58:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:58:15,166 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2021-01-06 09:58:15,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 09:58:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2021-01-06 09:58:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-01-06 09:58:15,168 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:58:15,168 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:58:15,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:15,369 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:58:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:58:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash -115514269, now seen corresponding path program 19 times [2021-01-06 09:58:15,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:58:15,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210102413] [2021-01-06 09:58:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:58:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2021-01-06 09:58:15,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210102413] [2021-01-06 09:58:15,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791819752] [2021-01-06 09:58:15,800 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:15,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:58:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:58:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2021-01-06 09:58:16,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:58:16,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 09:58:16,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948584742] [2021-01-06 09:58:16,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 09:58:16,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:58:16,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 09:58:16,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:58:16,098 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 26 states. [2021-01-06 09:58:16,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:58:16,322 INFO L93 Difference]: Finished difference Result 257 states and 262 transitions. [2021-01-06 09:58:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 09:58:16,322 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 147 [2021-01-06 09:58:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:58:16,324 INFO L225 Difference]: With dead ends: 257 [2021-01-06 09:58:16,324 INFO L226 Difference]: Without dead ends: 156 [2021-01-06 09:58:16,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:58:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-01-06 09:58:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2021-01-06 09:58:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 09:58:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2021-01-06 09:58:16,335 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 147 [2021-01-06 09:58:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:58:16,335 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2021-01-06 09:58:16,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 09:58:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2021-01-06 09:58:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-01-06 09:58:16,337 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:58:16,337 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:58:16,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 09:58:16,552 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:58:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:58:16,553 INFO L82 PathProgramCache]: Analyzing trace with hash -878686343, now seen corresponding path program 20 times [2021-01-06 09:58:16,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:58:16,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001619278] [2021-01-06 09:58:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:58:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2021-01-06 09:58:16,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001619278] [2021-01-06 09:58:16,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583164470] [2021-01-06 09:58:16,985 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:17,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:58:17,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:58:17,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 09:58:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:58:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2021-01-06 09:58:17,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:58:17,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 09:58:17,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288760218] [2021-01-06 09:58:17,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 09:58:17,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:58:17,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 09:58:17,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:58:17,293 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 27 states. [2021-01-06 09:58:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:58:17,546 INFO L93 Difference]: Finished difference Result 265 states and 270 transitions. [2021-01-06 09:58:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 09:58:17,549 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 152 [2021-01-06 09:58:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:58:17,551 INFO L225 Difference]: With dead ends: 265 [2021-01-06 09:58:17,551 INFO L226 Difference]: Without dead ends: 161 [2021-01-06 09:58:17,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:58:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-06 09:58:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2021-01-06 09:58:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 09:58:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2021-01-06 09:58:17,566 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 152 [2021-01-06 09:58:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:58:17,567 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2021-01-06 09:58:17,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 09:58:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2021-01-06 09:58:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-01-06 09:58:17,569 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:58:17,569 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:58:17,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:17,785 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:58:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:58:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash -236153121, now seen corresponding path program 21 times [2021-01-06 09:58:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:58:17,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467922950] [2021-01-06 09:58:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:58:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-01-06 09:58:18,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467922950] [2021-01-06 09:58:18,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311922871] [2021-01-06 09:58:18,319 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:37,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-01-06 09:58:37,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:58:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 09:58:37,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:58:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 0 proven. 845 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2021-01-06 09:58:38,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:58:38,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 48 [2021-01-06 09:58:38,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83338380] [2021-01-06 09:58:38,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 09:58:38,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:58:38,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 09:58:38,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=1662, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 09:58:38,183 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 48 states. [2021-01-06 09:58:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:58:41,004 INFO L93 Difference]: Finished difference Result 280 states and 286 transitions. [2021-01-06 09:58:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 09:58:41,005 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 157 [2021-01-06 09:58:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:58:41,006 INFO L225 Difference]: With dead ends: 280 [2021-01-06 09:58:41,006 INFO L226 Difference]: Without dead ends: 173 [2021-01-06 09:58:41,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1704, Invalid=5952, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 09:58:41,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-01-06 09:58:41,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2021-01-06 09:58:41,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 09:58:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2021-01-06 09:58:41,020 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 157 [2021-01-06 09:58:41,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:58:41,020 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2021-01-06 09:58:41,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 09:58:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2021-01-06 09:58:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 09:58:41,023 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:58:41,023 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:58:41,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 09:58:41,238 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:58:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:58:41,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1286028493, now seen corresponding path program 22 times [2021-01-06 09:58:41,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:58:41,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410077699] [2021-01-06 09:58:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:58:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1678 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2021-01-06 09:58:41,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410077699] [2021-01-06 09:58:41,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269789692] [2021-01-06 09:58:41,753 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:41,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:58:41,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:58:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 09:58:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:58:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1678 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2021-01-06 09:58:42,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:58:42,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 09:58:42,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881070731] [2021-01-06 09:58:42,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:58:42,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:58:42,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:58:42,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:58:42,091 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 29 states. [2021-01-06 09:58:42,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:58:42,386 INFO L93 Difference]: Finished difference Result 289 states and 294 transitions. [2021-01-06 09:58:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 09:58:42,387 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 166 [2021-01-06 09:58:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:58:42,389 INFO L225 Difference]: With dead ends: 289 [2021-01-06 09:58:42,389 INFO L226 Difference]: Without dead ends: 175 [2021-01-06 09:58:42,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:58:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-01-06 09:58:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2021-01-06 09:58:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 09:58:42,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2021-01-06 09:58:42,400 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 166 [2021-01-06 09:58:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:58:42,400 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2021-01-06 09:58:42,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:58:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2021-01-06 09:58:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 09:58:42,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:58:42,401 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:58:42,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 09:58:42,602 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:58:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:58:42,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2071358319, now seen corresponding path program 23 times [2021-01-06 09:58:42,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:58:42,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795596134] [2021-01-06 09:58:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:58:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1129 trivial. 0 not checked. [2021-01-06 09:58:43,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795596134] [2021-01-06 09:58:43,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641996963] [2021-01-06 09:58:43,164 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true