/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/loops/compact.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:36:42,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:36:42,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:36:42,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:36:42,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:36:42,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:36:42,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:36:42,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:36:42,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:36:42,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:36:42,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:36:42,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:36:42,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:36:42,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:36:42,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:36:42,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:36:42,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:36:42,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:36:42,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:36:42,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:36:42,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:36:42,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:36:42,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:36:42,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:36:42,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:36:42,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:36:42,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:36:42,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:36:42,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:36:42,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:36:42,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:36:42,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:36:42,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:36:42,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:36:42,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:36:42,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:36:42,618 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 16:36:42,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:36:42,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:36:42,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:36:42,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:36:42,650 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:36:42,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:36:42,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:36:42,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:36:42,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:36:42,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:36:42,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:36:42,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:36:42,652 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:36:42,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:36:42,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:36:42,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:36:42,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:36:42,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:36:42,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:36:42,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:36:42,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:36:42,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:36:42,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:36:42,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:36:42,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:36:42,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:36:43,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:36:43,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:36:43,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:36:43,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:36:43,168 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:36:43,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/compact.c [2021-01-06 16:36:43,275 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2df8392a9/3a426c71eda7418da03b666fbc8d66f7/FLAG61d088d15 [2021-01-06 16:36:44,044 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:36:44,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/compact.c [2021-01-06 16:36:44,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2df8392a9/3a426c71eda7418da03b666fbc8d66f7/FLAG61d088d15 [2021-01-06 16:36:44,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2df8392a9/3a426c71eda7418da03b666fbc8d66f7 [2021-01-06 16:36:44,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:36:44,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:36:44,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:36:44,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:36:44,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:36:44,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bca1f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44, skipping insertion in model container [2021-01-06 16:36:44,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:36:44,431 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~array~0,GLOBAL],[BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:36:44,597 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/loops/compact.c[609,622] [2021-01-06 16:36:44,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:36:44,617 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,GLOBAL],offset],BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:36:44,636 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/loops/compact.c[609,622] [2021-01-06 16:36:44,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:36:44,656 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:36:44,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44 WrapperNode [2021-01-06 16:36:44,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:36:44,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:36:44,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:36:44,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:36:44,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:36:44,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:36:44,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:36:44,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:36:44,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:36:44,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:36:44,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:36:44,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:36:44,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (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 16:36:44,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:36:44,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:36:44,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:36:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:36:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:36:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:36:45,265 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:36:45,266 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-01-06 16:36:45,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:36:45 BoogieIcfgContainer [2021-01-06 16:36:45,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:36:45,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:36:45,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:36:45,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:36:45,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:36:44" (1/3) ... [2021-01-06 16:36:45,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e96e3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:36:45, skipping insertion in model container [2021-01-06 16:36:45,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (2/3) ... [2021-01-06 16:36:45,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e96e3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:36:45, skipping insertion in model container [2021-01-06 16:36:45,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:36:45" (3/3) ... [2021-01-06 16:36:45,329 INFO L111 eAbstractionObserver]: Analyzing ICFG compact.c [2021-01-06 16:36:45,344 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:36:45,351 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:36:45,381 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:36:45,413 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:36:45,414 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:36:45,414 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:36:45,414 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:36:45,414 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:36:45,414 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:36:45,414 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:36:45,415 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:36:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-01-06 16:36:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:36:45,437 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:45,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:36:45,439 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:45,447 INFO L82 PathProgramCache]: Analyzing trace with hash 889605485, now seen corresponding path program 1 times [2021-01-06 16:36:45,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:45,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356425742] [2021-01-06 16:36:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:45,651 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 16:36:45,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356425742] [2021-01-06 16:36:45,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:36:45,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:36:45,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534532712] [2021-01-06 16:36:45,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:36:45,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:45,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:36:45,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:36:45,680 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2021-01-06 16:36:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:45,698 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-01-06 16:36:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:36:45,699 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:36:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:45,709 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:36:45,709 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:36:45,713 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 16:36:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:36:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:36:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:36:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-01-06 16:36:45,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-01-06 16:36:45,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:45,752 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-01-06 16:36:45,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:36:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-01-06 16:36:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:36:45,753 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:45,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:36:45,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:36:45,754 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:45,755 INFO L82 PathProgramCache]: Analyzing trace with hash 889605144, now seen corresponding path program 1 times [2021-01-06 16:36:45,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:45,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936113060] [2021-01-06 16:36:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:45,828 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 16:36:45,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936113060] [2021-01-06 16:36:45,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:36:45,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:36:45,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354296507] [2021-01-06 16:36:45,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:36:45,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:45,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:36:45,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:36:45,833 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2021-01-06 16:36:45,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:45,883 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-01-06 16:36:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:36:45,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:36:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:45,886 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:36:45,886 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:36:45,887 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 16:36:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:36:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2021-01-06 16:36:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:36:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 16:36:45,892 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6 [2021-01-06 16:36:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:45,893 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 16:36:45,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:36:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 16:36:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:36:45,893 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:45,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:45,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:36:45,894 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:45,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1566455322, now seen corresponding path program 1 times [2021-01-06 16:36:45,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:45,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228333961] [2021-01-06 16:36:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:46,101 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 16:36:46,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228333961] [2021-01-06 16:36:46,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779074662] [2021-01-06 16:36:46,103 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 16:36:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:46,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:36:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:46,284 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 16:36:46,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:46,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:36:46,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100768944] [2021-01-06 16:36:46,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:36:46,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:46,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:36:46,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:36:46,288 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2021-01-06 16:36:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:46,379 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-01-06 16:36:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:36:46,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 16:36:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:46,381 INFO L225 Difference]: With dead ends: 27 [2021-01-06 16:36:46,381 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:36:46,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:36:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:36:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-01-06 16:36:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:36:46,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 16:36:46,387 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2021-01-06 16:36:46,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:46,387 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 16:36:46,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:36:46,387 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 16:36:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:36:46,388 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:46,388 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:46,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:36:46,603 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:46,605 INFO L82 PathProgramCache]: Analyzing trace with hash 618737948, now seen corresponding path program 2 times [2021-01-06 16:36:46,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:46,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193717735] [2021-01-06 16:36:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:46,759 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 16:36:46,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193717735] [2021-01-06 16:36:46,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375075891] [2021-01-06 16:36:46,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:46,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:36:46,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:36:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:36:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:46,944 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 16:36:46,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:46,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:36:46,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776982756] [2021-01-06 16:36:46,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:36:46,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:46,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:36:46,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:36:46,947 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2021-01-06 16:36:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:47,063 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-01-06 16:36:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:36:47,064 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-01-06 16:36:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:47,065 INFO L225 Difference]: With dead ends: 35 [2021-01-06 16:36:47,065 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:36:47,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:36:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:36:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-01-06 16:36:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:36:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-01-06 16:36:47,072 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2021-01-06 16:36:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:47,073 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-01-06 16:36:47,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:36:47,073 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-01-06 16:36:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:36:47,074 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:47,074 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:47,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:47,289 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:47,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:47,290 INFO L82 PathProgramCache]: Analyzing trace with hash -563213034, now seen corresponding path program 3 times [2021-01-06 16:36:47,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:47,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775800963] [2021-01-06 16:36:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:47,523 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 16:36:47,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775800963] [2021-01-06 16:36:47,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575025334] [2021-01-06 16:36:47,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:47,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:36:47,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:36:47,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:36:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:47,713 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 16:36:47,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:47,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:36:47,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080350905] [2021-01-06 16:36:47,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:36:47,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:47,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:36:47,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:36:47,716 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2021-01-06 16:36:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:47,884 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-01-06 16:36:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:36:47,886 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-01-06 16:36:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:47,887 INFO L225 Difference]: With dead ends: 43 [2021-01-06 16:36:47,887 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:36:47,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:36:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:36:47,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-01-06 16:36:47,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:36:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 16:36:47,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2021-01-06 16:36:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:47,894 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 16:36:47,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:36:47,895 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 16:36:47,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:36:47,896 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:47,896 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:48,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:48,111 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:48,112 INFO L82 PathProgramCache]: Analyzing trace with hash -463491552, now seen corresponding path program 4 times [2021-01-06 16:36:48,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:48,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917218105] [2021-01-06 16:36:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 16:36:48,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917218105] [2021-01-06 16:36:48,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621964936] [2021-01-06 16:36:48,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:48,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:36:48,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:36:48,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:36:48,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:36:48,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:48,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:36:48,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597274946] [2021-01-06 16:36:48,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:36:48,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:48,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:36:48,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:36:48,530 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2021-01-06 16:36:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:48,732 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2021-01-06 16:36:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:36:48,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2021-01-06 16:36:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:48,734 INFO L225 Difference]: With dead ends: 51 [2021-01-06 16:36:48,734 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 16:36:48,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:36:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 16:36:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-01-06 16:36:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 16:36:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-01-06 16:36:48,742 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2021-01-06 16:36:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:48,742 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-01-06 16:36:48,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:36:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-01-06 16:36:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:36:48,743 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:48,743 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:48,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:48,959 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1465373678, now seen corresponding path program 5 times [2021-01-06 16:36:48,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:48,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145882736] [2021-01-06 16:36:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 16:36:49,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145882736] [2021-01-06 16:36:49,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930478652] [2021-01-06 16:36:49,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:49,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:36:49,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:36:49,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:36:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 16:36:49,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:49,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:36:49,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606983880] [2021-01-06 16:36:49,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:36:49,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:49,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:36:49,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:36:49,877 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states. [2021-01-06 16:36:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:50,045 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-01-06 16:36:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:36:50,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2021-01-06 16:36:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:50,047 INFO L225 Difference]: With dead ends: 59 [2021-01-06 16:36:50,047 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:36:50,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:36:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:36:50,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-01-06 16:36:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:36:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-01-06 16:36:50,054 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2021-01-06 16:36:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:50,055 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-01-06 16:36:50,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:36:50,055 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-01-06 16:36:50,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:36:50,056 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:50,056 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:50,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:36:50,260 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1834613980, now seen corresponding path program 6 times [2021-01-06 16:36:50,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:50,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824062352] [2021-01-06 16:36:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 16:36:50,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824062352] [2021-01-06 16:36:50,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955840236] [2021-01-06 16:36:50,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:50,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:36:50,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:36:50,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:36:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:36:50,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:50,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:36:50,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379012484] [2021-01-06 16:36:50,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:36:50,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:50,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:36:50,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:36:50,924 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 10 states. [2021-01-06 16:36:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:51,129 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2021-01-06 16:36:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:36:51,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2021-01-06 16:36:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:51,130 INFO L225 Difference]: With dead ends: 67 [2021-01-06 16:36:51,130 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 16:36:51,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:36:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 16:36:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-01-06 16:36:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:36:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-01-06 16:36:51,137 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2021-01-06 16:36:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:51,138 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-01-06 16:36:51,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:36:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-01-06 16:36:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 16:36:51,139 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:51,140 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:51,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:51,355 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:51,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1427614962, now seen corresponding path program 7 times [2021-01-06 16:36:51,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:51,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001434424] [2021-01-06 16:36:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 16:36:51,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001434424] [2021-01-06 16:36:51,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773708859] [2021-01-06 16:36:51,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:51,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:36:51,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 16:36:51,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:51,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:36:51,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640978704] [2021-01-06 16:36:51,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:36:51,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:51,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:36:51,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:36:51,761 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 11 states. [2021-01-06 16:36:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:52,006 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2021-01-06 16:36:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:36:52,007 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2021-01-06 16:36:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:52,008 INFO L225 Difference]: With dead ends: 75 [2021-01-06 16:36:52,008 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:36:52,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:36:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:36:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-01-06 16:36:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:36:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-01-06 16:36:52,016 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2021-01-06 16:36:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:52,016 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-01-06 16:36:52,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:36:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-01-06 16:36:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:36:52,018 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:52,018 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:52,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:52,230 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:52,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1406693416, now seen corresponding path program 8 times [2021-01-06 16:36:52,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:52,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503867490] [2021-01-06 16:36:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 16:36:52,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503867490] [2021-01-06 16:36:52,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056293512] [2021-01-06 16:36:52,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:52,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:36:52,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:36:52,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:36:52,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 16:36:52,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:52,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:36:52,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071817367] [2021-01-06 16:36:52,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:36:52,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:52,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:36:52,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:36:52,622 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 12 states. [2021-01-06 16:36:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:52,916 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-01-06 16:36:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:36:52,917 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2021-01-06 16:36:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:52,918 INFO L225 Difference]: With dead ends: 83 [2021-01-06 16:36:52,918 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 16:36:52,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:36:52,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 16:36:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-01-06 16:36:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 16:36:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-01-06 16:36:52,926 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2021-01-06 16:36:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:52,926 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-01-06 16:36:52,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:36:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-01-06 16:36:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:36:52,927 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:52,928 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:53,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:36:53,142 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:53,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:53,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1928707574, now seen corresponding path program 9 times [2021-01-06 16:36:53,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:53,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907106116] [2021-01-06 16:36:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 16:36:53,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907106116] [2021-01-06 16:36:53,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596964521] [2021-01-06 16:36:53,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:54,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:36:54,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:36:54,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:36:54,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 16:36:54,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:54,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:36:54,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100938086] [2021-01-06 16:36:54,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:36:54,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:36:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:36:54,683 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 13 states. [2021-01-06 16:36:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:55,002 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2021-01-06 16:36:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:36:55,003 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2021-01-06 16:36:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:55,007 INFO L225 Difference]: With dead ends: 91 [2021-01-06 16:36:55,007 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 16:36:55,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:36:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 16:36:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-01-06 16:36:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 16:36:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-01-06 16:36:55,028 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2021-01-06 16:36:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:55,028 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-01-06 16:36:55,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:36:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-01-06 16:36:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:36:55,030 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:55,030 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:55,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:55,238 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:55,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:55,239 INFO L82 PathProgramCache]: Analyzing trace with hash -719637204, now seen corresponding path program 10 times [2021-01-06 16:36:55,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:55,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917639055] [2021-01-06 16:36:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 16:36:55,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917639055] [2021-01-06 16:36:55,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958782742] [2021-01-06 16:36:55,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:55,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:36:55,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:36:55,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:36:55,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 16:36:55,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:55,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:36:55,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162125029] [2021-01-06 16:36:55,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:36:55,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:55,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:36:55,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:36:55,699 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 14 states. [2021-01-06 16:36:56,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:56,129 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2021-01-06 16:36:56,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:36:56,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2021-01-06 16:36:56,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:56,131 INFO L225 Difference]: With dead ends: 99 [2021-01-06 16:36:56,131 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 16:36:56,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:36:56,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 16:36:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-01-06 16:36:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 16:36:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-01-06 16:36:56,139 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2021-01-06 16:36:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:56,139 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-01-06 16:36:56,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:36:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-01-06 16:36:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 16:36:56,140 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:56,141 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:56,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:56,356 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:56,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:56,357 INFO L82 PathProgramCache]: Analyzing trace with hash 736737542, now seen corresponding path program 11 times [2021-01-06 16:36:56,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:56,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808099818] [2021-01-06 16:36:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-06 16:36:56,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808099818] [2021-01-06 16:36:56,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554480323] [2021-01-06 16:36:56,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:24,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:39:24,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:39:24,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:39:24,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:39:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-06 16:39:24,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:39:24,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:39:24,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986491640] [2021-01-06 16:39:24,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:39:24,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:24,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:39:24,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:39:24,524 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 15 states. [2021-01-06 16:39:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:25,010 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2021-01-06 16:39:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:39:25,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2021-01-06 16:39:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:25,014 INFO L225 Difference]: With dead ends: 107 [2021-01-06 16:39:25,014 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 16:39:25,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:39:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 16:39:25,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-01-06 16:39:25,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:39:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-01-06 16:39:25,034 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 61 [2021-01-06 16:39:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:25,034 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-01-06 16:39:25,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:39:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-01-06 16:39:25,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:39:25,036 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:25,036 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:25,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:39:25,238 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:25,239 INFO L82 PathProgramCache]: Analyzing trace with hash -795700688, now seen corresponding path program 12 times [2021-01-06 16:39:25,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:25,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604885128] [2021-01-06 16:39:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 16:39:25,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604885128] [2021-01-06 16:39:25,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973318611] [2021-01-06 16:39:25,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:28,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:39:28,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:39:28,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:39:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:39:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:39:28,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:39:28,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:39:28,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102185848] [2021-01-06 16:39:28,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:39:28,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:28,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:39:28,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:39:28,927 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 16 states. [2021-01-06 16:39:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:29,423 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-01-06 16:39:29,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:39:29,423 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2021-01-06 16:39:29,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:29,425 INFO L225 Difference]: With dead ends: 115 [2021-01-06 16:39:29,425 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 16:39:29,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:39:29,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 16:39:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-01-06 16:39:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 16:39:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-01-06 16:39:29,433 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2021-01-06 16:39:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:29,433 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-01-06 16:39:29,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:39:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-01-06 16:39:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 16:39:29,435 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:29,435 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:29,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:39:29,646 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:29,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:29,646 INFO L82 PathProgramCache]: Analyzing trace with hash 358774786, now seen corresponding path program 13 times [2021-01-06 16:39:29,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:29,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652905067] [2021-01-06 16:39:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 16:39:29,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652905067] [2021-01-06 16:39:29,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941551331] [2021-01-06 16:39:29,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:30,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:39:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:39:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 16:39:30,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:39:30,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:39:30,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62570557] [2021-01-06 16:39:30,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:39:30,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:30,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:39:30,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:39:30,242 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2021-01-06 16:39:30,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:30,851 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2021-01-06 16:39:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:39:30,852 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2021-01-06 16:39:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:30,854 INFO L225 Difference]: With dead ends: 123 [2021-01-06 16:39:30,854 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:39:30,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:39:30,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:39:30,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-01-06 16:39:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 16:39:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-01-06 16:39:30,870 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2021-01-06 16:39:30,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:30,870 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-01-06 16:39:30,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:39:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-01-06 16:39:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 16:39:30,873 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:30,873 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:31,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:39:31,089 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:31,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1855797452, now seen corresponding path program 14 times [2021-01-06 16:39:31,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:31,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951667501] [2021-01-06 16:39:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-01-06 16:39:31,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951667501] [2021-01-06 16:39:31,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603911994] [2021-01-06 16:39:31,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:31,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:39:31,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:39:31,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:39:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:39:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 16:39:31,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:39:31,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:39:31,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520271351] [2021-01-06 16:39:31,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:39:31,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:31,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:39:31,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:39:31,711 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 18 states. [2021-01-06 16:39:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:32,396 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2021-01-06 16:39:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:39:32,396 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2021-01-06 16:39:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:32,398 INFO L225 Difference]: With dead ends: 131 [2021-01-06 16:39:32,398 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 16:39:32,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:39:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 16:39:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-01-06 16:39:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 16:39:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-01-06 16:39:32,413 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2021-01-06 16:39:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:32,415 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-01-06 16:39:32,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:39:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-01-06 16:39:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 16:39:32,421 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:32,421 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:32,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:32,635 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:32,636 INFO L82 PathProgramCache]: Analyzing trace with hash 72367870, now seen corresponding path program 15 times [2021-01-06 16:39:32,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:32,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170095963] [2021-01-06 16:39:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 16:39:32,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170095963] [2021-01-06 16:39:32,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449646711] [2021-01-06 16:39:32,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:52,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 16:39:52,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:39:52,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:39:52,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:39:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 16:39:52,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:39:52,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:39:52,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672616009] [2021-01-06 16:39:52,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:39:52,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:52,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:39:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:39:52,757 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 19 states. [2021-01-06 16:39:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:53,524 INFO L93 Difference]: Finished difference Result 139 states and 142 transitions. [2021-01-06 16:39:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:39:53,524 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2021-01-06 16:39:53,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:53,525 INFO L225 Difference]: With dead ends: 139 [2021-01-06 16:39:53,525 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 16:39:53,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:39:53,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 16:39:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2021-01-06 16:39:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:39:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-01-06 16:39:53,535 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2021-01-06 16:39:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:53,536 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-01-06 16:39:53,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:39:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-01-06 16:39:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 16:39:53,537 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:53,537 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:53,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:39:53,747 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:53,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:53,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2008028216, now seen corresponding path program 16 times [2021-01-06 16:39:53,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:53,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257250897] [2021-01-06 16:39:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 16:39:54,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257250897] [2021-01-06 16:39:54,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750417887] [2021-01-06 16:39:54,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:39:54,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:39:54,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:39:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:39:54,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:39:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:39:54,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:39:54,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:39:54,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895299359] [2021-01-06 16:39:54,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:39:54,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:39:54,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:39:54,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:39:54,429 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 20 states. [2021-01-06 16:39:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:39:55,309 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2021-01-06 16:39:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:39:55,310 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 86 [2021-01-06 16:39:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:39:55,311 INFO L225 Difference]: With dead ends: 147 [2021-01-06 16:39:55,311 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 16:39:55,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:39:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 16:39:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-01-06 16:39:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 16:39:55,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-01-06 16:39:55,316 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 86 [2021-01-06 16:39:55,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:39:55,317 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-01-06 16:39:55,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:39:55,317 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-01-06 16:39:55,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 16:39:55,318 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:39:55,318 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:39:55,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:39:55,532 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:39:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:39:55,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1552862714, now seen corresponding path program 17 times [2021-01-06 16:39:55,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:39:55,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862107398] [2021-01-06 16:39:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:39:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:39:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 16:39:55,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862107398] [2021-01-06 16:39:55,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577888669] [2021-01-06 16:39:55,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true