/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/recursive-simple/sum_20x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:27:27,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:27:27,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:27:27,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:27:27,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:27:27,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:27:27,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:27:27,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:27:27,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:27:27,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:27:27,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:27:27,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:27:27,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:27:27,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:27:27,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:27:27,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:27:27,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:27:27,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:27:27,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:27:27,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:27:27,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:27:27,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:27:27,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:27:27,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:27:27,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:27:27,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:27:27,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:27:27,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:27:27,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:27:27,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:27:27,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:27:27,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:27:27,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:27:27,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:27:27,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:27:27,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:27:27,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:27:27,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:27:27,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:27:27,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:27:27,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:27:27,761 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:27:27,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:27:27,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:27:27,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:27:27,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:27:27,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:27:27,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:27:27,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:27:27,763 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:27:27,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:27:27,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:27:27,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:27:27,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:27:27,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:27:27,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:27:27,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:27:27,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:27:27,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:27:27,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:27:27,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:27:27,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:27:27,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:27:28,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:27:28,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:27:28,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:27:28,174 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:27:28,175 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:27:28,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2020-12-23 09:27:28,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/92f36bf69/7e70316157e947ec9cdd7b4ec5059a35/FLAG67faf1b20 [2020-12-23 09:27:28,882 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:27:28,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2020-12-23 09:27:28,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/92f36bf69/7e70316157e947ec9cdd7b4ec5059a35/FLAG67faf1b20 [2020-12-23 09:27:29,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/92f36bf69/7e70316157e947ec9cdd7b4ec5059a35 [2020-12-23 09:27:29,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:27:29,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:27:29,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:27:29,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:27:29,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:27:29,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:27:29" (1/1) ... [2020-12-23 09:27:29,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81369ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29, skipping insertion in model container [2020-12-23 09:27:29,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:27:29" (1/1) ... [2020-12-23 09:27:29,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:27:29,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:27:29,496 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/recursive-simple/sum_20x0-1.c[481,494] [2020-12-23 09:27:29,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:27:29,514 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:27:29,530 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/recursive-simple/sum_20x0-1.c[481,494] [2020-12-23 09:27:29,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:27:29,547 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:27:29,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29 WrapperNode [2020-12-23 09:27:29,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:27:29,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:27:29,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:27:29,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:27:29,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29" (1/1) ... [2020-12-23 09:27:29,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29" (1/1) ... [2020-12-23 09:27:29,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:27:29,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:27:29,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:27:29,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:27:29,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29" (1/1) ... [2020-12-23 09:27:29,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29" (1/1) ... [2020-12-23 09:27:29,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29" (1/1) ... [2020-12-23 09:27:29,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29" (1/1) ... [2020-12-23 09:27:29,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29" (1/1) ... [2020-12-23 09:27:29,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29" (1/1) ... [2020-12-23 09:27:29,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29" (1/1) ... [2020-12-23 09:27:29,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:27:29,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:27:29,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:27:29,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:27:29,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29" (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 [2020-12-23 09:27:29,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:27:29,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:27:29,699 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-12-23 09:27:29,699 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-12-23 09:27:29,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:27:29,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:27:29,949 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:27:29,949 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:27:29,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:29 BoogieIcfgContainer [2020-12-23 09:27:29,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:27:29,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:27:29,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:27:29,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:27:29,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:27:29" (1/3) ... [2020-12-23 09:27:29,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef5b17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:27:29, skipping insertion in model container [2020-12-23 09:27:29,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:29" (2/3) ... [2020-12-23 09:27:29,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef5b17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:27:29, skipping insertion in model container [2020-12-23 09:27:29,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:29" (3/3) ... [2020-12-23 09:27:29,961 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2020-12-23 09:27:29,969 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:27:29,975 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:27:30,003 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:27:30,042 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:27:30,042 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:27:30,042 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:27:30,042 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:27:30,042 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:27:30,043 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:27:30,043 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:27:30,043 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:27:30,082 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 09:27:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:27:30,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:30,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:30,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:30,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:30,116 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-23 09:27:30,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:30,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778717594] [2020-12-23 09:27:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:27:30,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778717594] [2020-12-23 09:27:30,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:27:30,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:27:30,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090345428] [2020-12-23 09:27:30,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:27:30,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:30,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:27:30,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:27:30,508 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-23 09:27:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:30,602 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-23 09:27:30,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:27:30,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:27:30,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:30,615 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:27:30,616 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 09:27:30,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:27:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 09:27:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 09:27:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 09:27:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 09:27:30,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-23 09:27:30,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:30,668 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 09:27:30,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:27:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 09:27:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 09:27:30,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:30,670 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:30,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:27:30,671 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-23 09:27:30,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:30,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882596333] [2020-12-23 09:27:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:27:30,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882596333] [2020-12-23 09:27:30,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855433418] [2020-12-23 09:27:30,831 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 [2020-12-23 09:27:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:27:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:27:31,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:31,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 09:27:31,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664487312] [2020-12-23 09:27:31,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 09:27:31,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 09:27:31,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:27:31,021 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-23 09:27:31,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:31,071 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 09:27:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:27:31,072 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 09:27:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:31,073 INFO L225 Difference]: With dead ends: 22 [2020-12-23 09:27:31,073 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 09:27:31,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:27:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 09:27:31,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 09:27:31,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 09:27:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 09:27:31,081 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-23 09:27:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:31,081 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 09:27:31,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 09:27:31,081 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 09:27:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 09:27:31,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:31,083 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:31,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 09:27:31,297 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:31,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:31,299 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-23 09:27:31,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:31,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613553580] [2020-12-23 09:27:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:27:31,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613553580] [2020-12-23 09:27:31,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822570059] [2020-12-23 09:27:31,507 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 [2020-12-23 09:27:31,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:27:31,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:27:31,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:27:31,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:31,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 09:27:31,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964082662] [2020-12-23 09:27:31,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:27:31,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:31,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:27:31,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:27:31,650 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-23 09:27:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:31,714 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-23 09:27:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:27:31,715 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-23 09:27:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:31,716 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:27:31,716 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 09:27:31,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:27:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 09:27:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 09:27:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 09:27:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 09:27:31,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-23 09:27:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:31,724 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 09:27:31,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:27:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 09:27:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 09:27:31,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:31,726 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:31,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:31,940 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2020-12-23 09:27:31,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:31,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116981479] [2020-12-23 09:27:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:27:32,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116981479] [2020-12-23 09:27:32,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650666599] [2020-12-23 09:27:32,160 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 [2020-12-23 09:27:32,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 09:27:32,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:32,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 09:27:32,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:27:32,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:32,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 09:27:32,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785463829] [2020-12-23 09:27:32,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 09:27:32,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:32,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 09:27:32,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:27:32,380 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-12-23 09:27:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:32,469 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 09:27:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 09:27:32,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-23 09:27:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:32,471 INFO L225 Difference]: With dead ends: 28 [2020-12-23 09:27:32,471 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 09:27:32,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:27:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 09:27:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 09:27:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 09:27:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 09:27:32,478 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-23 09:27:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:32,479 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 09:27:32,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 09:27:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 09:27:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 09:27:32,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:32,481 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:32,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:32,695 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:32,696 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2020-12-23 09:27:32,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:32,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570463328] [2020-12-23 09:27:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 09:27:32,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570463328] [2020-12-23 09:27:32,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387498420] [2020-12-23 09:27:32,937 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 [2020-12-23 09:27:32,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:27:32,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:32,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 09:27:32,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 09:27:33,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:33,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 09:27:33,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852492020] [2020-12-23 09:27:33,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:27:33,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:33,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:27:33,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:27:33,133 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-23 09:27:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:33,220 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-23 09:27:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 09:27:33,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-23 09:27:33,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:33,222 INFO L225 Difference]: With dead ends: 31 [2020-12-23 09:27:33,223 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 09:27:33,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:27:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 09:27:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 09:27:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:27:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 09:27:33,230 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-23 09:27:33,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:33,230 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 09:27:33,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:27:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 09:27:33,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:27:33,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:33,232 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:33,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:33,447 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:33,448 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2020-12-23 09:27:33,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:33,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273831278] [2020-12-23 09:27:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 09:27:33,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273831278] [2020-12-23 09:27:33,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080134883] [2020-12-23 09:27:33,740 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 [2020-12-23 09:27:33,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 09:27:33,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:33,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 09:27:33,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 09:27:33,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:33,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 09:27:33,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183088276] [2020-12-23 09:27:33,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:27:33,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:33,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:27:33,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:27:33,946 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-12-23 09:27:34,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:34,092 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 09:27:34,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:27:34,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-12-23 09:27:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:34,096 INFO L225 Difference]: With dead ends: 34 [2020-12-23 09:27:34,096 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 09:27:34,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:27:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 09:27:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 09:27:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 09:27:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 09:27:34,115 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-12-23 09:27:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:34,115 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 09:27:34,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:27:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 09:27:34,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 09:27:34,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:34,118 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:34,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 09:27:34,329 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:34,330 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2020-12-23 09:27:34,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:34,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405271297] [2020-12-23 09:27:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 09:27:34,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405271297] [2020-12-23 09:27:34,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790841726] [2020-12-23 09:27:34,595 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 [2020-12-23 09:27:34,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 09:27:34,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:34,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 09:27:34,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 09:27:34,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:34,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 09:27:34,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608493369] [2020-12-23 09:27:34,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 09:27:34,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:34,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 09:27:34,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:27:34,857 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-12-23 09:27:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:34,964 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-23 09:27:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 09:27:34,965 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-12-23 09:27:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:34,966 INFO L225 Difference]: With dead ends: 37 [2020-12-23 09:27:34,966 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 09:27:34,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:27:34,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 09:27:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 09:27:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 09:27:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-23 09:27:34,973 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-12-23 09:27:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:34,974 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-23 09:27:34,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 09:27:34,974 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-23 09:27:34,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 09:27:34,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:34,976 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:35,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:35,190 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:35,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:35,191 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2020-12-23 09:27:35,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:35,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926727761] [2020-12-23 09:27:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,426 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 09:27:35,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926727761] [2020-12-23 09:27:35,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145765975] [2020-12-23 09:27:35,427 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 [2020-12-23 09:27:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 09:27:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 09:27:35,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:35,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 09:27:35,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439962250] [2020-12-23 09:27:35,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 09:27:35,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:35,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 09:27:35,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:27:35,642 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-12-23 09:27:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:35,796 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-23 09:27:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 09:27:35,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-12-23 09:27:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:35,801 INFO L225 Difference]: With dead ends: 40 [2020-12-23 09:27:35,801 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 09:27:35,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:27:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 09:27:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 09:27:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 09:27:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 09:27:35,814 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-12-23 09:27:35,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:35,815 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 09:27:35,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 09:27:35,815 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 09:27:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 09:27:35,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:35,820 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:36,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:36,030 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:36,031 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2020-12-23 09:27:36,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:36,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74558677] [2020-12-23 09:27:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 09:27:36,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74558677] [2020-12-23 09:27:36,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221255449] [2020-12-23 09:27:36,307 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 [2020-12-23 09:27:36,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:27:36,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:36,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 09:27:36,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 09:27:36,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:36,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 09:27:36,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246866666] [2020-12-23 09:27:36,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:27:36,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:36,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:27:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:27:36,534 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-12-23 09:27:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:36,704 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-23 09:27:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 09:27:36,705 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-12-23 09:27:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:36,706 INFO L225 Difference]: With dead ends: 43 [2020-12-23 09:27:36,706 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 09:27:36,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-12-23 09:27:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 09:27:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 09:27:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 09:27:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-23 09:27:36,714 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-12-23 09:27:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:36,714 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-23 09:27:36,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:27:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-23 09:27:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 09:27:36,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:36,716 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:36,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 09:27:36,928 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2020-12-23 09:27:36,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:36,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427539773] [2020-12-23 09:27:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 09:27:37,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427539773] [2020-12-23 09:27:37,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984917037] [2020-12-23 09:27:37,305 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 [2020-12-23 09:27:37,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 09:27:37,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:37,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 09:27:37,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 09:27:37,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:37,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 09:27:37,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977920592] [2020-12-23 09:27:37,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 09:27:37,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 09:27:37,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:27:37,591 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-12-23 09:27:37,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:37,737 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-23 09:27:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 09:27:37,737 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-23 09:27:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:37,739 INFO L225 Difference]: With dead ends: 46 [2020-12-23 09:27:37,739 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 09:27:37,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-12-23 09:27:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 09:27:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 09:27:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 09:27:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-23 09:27:37,745 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-12-23 09:27:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:37,746 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-23 09:27:37,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 09:27:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-23 09:27:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 09:27:37,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:37,747 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:37,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:37,961 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:37,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2020-12-23 09:27:37,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:37,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731895362] [2020-12-23 09:27:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-23 09:27:38,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731895362] [2020-12-23 09:27:38,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790855000] [2020-12-23 09:27:38,396 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 [2020-12-23 09:27:38,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:27:38,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:38,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 09:27:38,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-23 09:27:38,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:38,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 09:27:38,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546731075] [2020-12-23 09:27:38,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 09:27:38,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:38,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 09:27:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-12-23 09:27:38,602 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-12-23 09:27:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:38,760 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-12-23 09:27:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 09:27:38,761 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-12-23 09:27:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:38,762 INFO L225 Difference]: With dead ends: 49 [2020-12-23 09:27:38,762 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 09:27:38,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-12-23 09:27:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 09:27:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 09:27:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 09:27:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-23 09:27:38,770 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-12-23 09:27:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:38,770 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-23 09:27:38,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 09:27:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-23 09:27:38,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 09:27:38,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:38,772 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:38,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:38,987 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:38,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:38,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2020-12-23 09:27:38,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:38,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439855833] [2020-12-23 09:27:38,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 09:27:39,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439855833] [2020-12-23 09:27:39,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685138098] [2020-12-23 09:27:39,540 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 [2020-12-23 09:27:39,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 09:27:39,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:39,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 09:27:39,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 09:27:39,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:39,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 09:27:39,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922949698] [2020-12-23 09:27:39,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:27:39,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:39,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:27:39,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:27:39,794 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-12-23 09:27:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:40,039 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 09:27:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:27:40,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-23 09:27:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:40,041 INFO L225 Difference]: With dead ends: 52 [2020-12-23 09:27:40,042 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 09:27:40,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-23 09:27:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 09:27:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 09:27:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 09:27:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 09:27:40,064 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-12-23 09:27:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:40,064 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 09:27:40,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:27:40,065 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 09:27:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 09:27:40,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:40,066 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:40,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 09:27:40,282 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:40,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2020-12-23 09:27:40,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:40,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202199685] [2020-12-23 09:27:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-23 09:27:40,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202199685] [2020-12-23 09:27:40,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52595822] [2020-12-23 09:27:40,807 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 [2020-12-23 09:27:40,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 09:27:40,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:40,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 09:27:40,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-23 09:27:41,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:41,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 09:27:41,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046825485] [2020-12-23 09:27:41,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 09:27:41,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:41,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 09:27:41,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:27:41,069 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-12-23 09:27:41,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:41,277 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-23 09:27:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 09:27:41,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-12-23 09:27:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:41,279 INFO L225 Difference]: With dead ends: 55 [2020-12-23 09:27:41,279 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 09:27:41,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-12-23 09:27:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 09:27:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 09:27:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 09:27:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-23 09:27:41,286 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-12-23 09:27:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:41,286 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-23 09:27:41,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 09:27:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-23 09:27:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 09:27:41,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:41,287 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:41,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 09:27:41,494 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:41,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:41,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2020-12-23 09:27:41,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:41,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019526993] [2020-12-23 09:27:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:41,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-23 09:27:42,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019526993] [2020-12-23 09:27:42,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461287422] [2020-12-23 09:27:42,041 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 [2020-12-23 09:27:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:42,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 09:27:42,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-23 09:27:42,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:42,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 09:27:42,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361272929] [2020-12-23 09:27:42,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 09:27:42,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:42,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 09:27:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:27:42,295 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-12-23 09:27:42,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:42,547 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-23 09:27:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 09:27:42,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-12-23 09:27:42,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:42,549 INFO L225 Difference]: With dead ends: 58 [2020-12-23 09:27:42,549 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 09:27:42,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:27:42,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 09:27:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 09:27:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 09:27:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-23 09:27:42,563 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-12-23 09:27:42,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:42,565 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-23 09:27:42,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 09:27:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-23 09:27:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 09:27:42,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:42,568 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:42,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 09:27:42,783 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:42,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:42,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2020-12-23 09:27:42,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:42,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418730613] [2020-12-23 09:27:42,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:42,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:42,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:42,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:42,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-23 09:27:43,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418730613] [2020-12-23 09:27:43,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359628427] [2020-12-23 09:27:43,498 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 [2020-12-23 09:27:43,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:27:43,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:43,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 09:27:43,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-23 09:27:43,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:43,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 09:27:43,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399797548] [2020-12-23 09:27:43,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 09:27:43,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 09:27:43,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-12-23 09:27:43,753 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-12-23 09:27:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:44,020 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-23 09:27:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 09:27:44,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-12-23 09:27:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:44,022 INFO L225 Difference]: With dead ends: 61 [2020-12-23 09:27:44,022 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 09:27:44,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 09:27:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 09:27:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 09:27:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 09:27:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-23 09:27:44,029 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-12-23 09:27:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:44,030 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-23 09:27:44,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 09:27:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-23 09:27:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 09:27:44,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:44,031 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:44,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:44,246 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:44,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:44,247 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2020-12-23 09:27:44,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:44,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942442385] [2020-12-23 09:27:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-23 09:27:44,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942442385] [2020-12-23 09:27:44,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572654937] [2020-12-23 09:27:44,922 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 [2020-12-23 09:27:45,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 09:27:45,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:45,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 09:27:45,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-23 09:27:45,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:45,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 09:27:45,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526528349] [2020-12-23 09:27:45,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 09:27:45,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:45,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 09:27:45,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:27:45,269 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-12-23 09:27:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:45,545 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-12-23 09:27:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 09:27:45,546 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-12-23 09:27:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:45,547 INFO L225 Difference]: With dead ends: 64 [2020-12-23 09:27:45,547 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 09:27:45,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 09:27:45,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 09:27:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 09:27:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 09:27:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-23 09:27:45,554 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-12-23 09:27:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:45,555 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-23 09:27:45,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 09:27:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-23 09:27:45,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 09:27:45,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:45,556 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:45,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 09:27:45,772 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:45,773 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2020-12-23 09:27:45,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:45,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763090149] [2020-12-23 09:27:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:45,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:45,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:45,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:45,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:45,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-23 09:27:46,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763090149] [2020-12-23 09:27:46,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592075054] [2020-12-23 09:27:46,442 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 [2020-12-23 09:27:46,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:27:46,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:46,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 09:27:46,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-23 09:27:46,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:46,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 09:27:46,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338062234] [2020-12-23 09:27:46,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 09:27:46,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:46,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 09:27:46,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:27:46,712 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-12-23 09:27:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:47,007 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-23 09:27:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 09:27:47,007 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-12-23 09:27:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:47,009 INFO L225 Difference]: With dead ends: 67 [2020-12-23 09:27:47,009 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 09:27:47,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 09:27:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 09:27:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 09:27:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 09:27:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-23 09:27:47,016 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2020-12-23 09:27:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:47,017 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-23 09:27:47,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 09:27:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-23 09:27:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 09:27:47,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:47,019 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:47,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 09:27:47,233 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:47,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:47,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2020-12-23 09:27:47,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:47,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707895569] [2020-12-23 09:27:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:47,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-23 09:27:48,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707895569] [2020-12-23 09:27:48,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795112587] [2020-12-23 09:27:48,067 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 [2020-12-23 09:27:48,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 09:27:48,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:48,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 09:27:48,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-23 09:27:48,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:48,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 09:27:48,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361200356] [2020-12-23 09:27:48,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 09:27:48,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:48,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 09:27:48,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-12-23 09:27:48,390 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-12-23 09:27:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:48,669 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-12-23 09:27:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 09:27:48,669 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-12-23 09:27:48,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:48,671 INFO L225 Difference]: With dead ends: 70 [2020-12-23 09:27:48,671 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 09:27:48,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 09:27:48,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 09:27:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-23 09:27:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 09:27:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-23 09:27:48,678 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2020-12-23 09:27:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:48,678 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-23 09:27:48,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 09:27:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-23 09:27:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 09:27:48,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:48,680 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:48,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 09:27:48,896 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2020-12-23 09:27:48,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:48,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522765938] [2020-12-23 09:27:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:48,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:48,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-23 09:27:49,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522765938] [2020-12-23 09:27:49,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46481622] [2020-12-23 09:27:49,765 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:49,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 09:27:49,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 09:27:49,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-23 09:27:51,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:51,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 43] total 63 [2020-12-23 09:27:51,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560584522] [2020-12-23 09:27:51,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 09:27:51,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:51,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 09:27:51,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 09:27:51,680 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 63 states. [2020-12-23 09:27:53,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:53,474 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-23 09:27:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 09:27:53,475 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 118 [2020-12-23 09:27:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:53,477 INFO L225 Difference]: With dead ends: 73 [2020-12-23 09:27:53,477 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 09:27:53,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 09:27:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 09:27:53,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-23 09:27:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 09:27:53,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-23 09:27:53,487 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2020-12-23 09:27:53,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:53,488 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-23 09:27:53,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 09:27:53,488 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-23 09:27:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 09:27:53,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:53,489 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:53,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:53,705 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2020-12-23 09:27:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:53,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236743727] [2020-12-23 09:27:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:53,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:53,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:53,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:53,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-23 09:27:54,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236743727] [2020-12-23 09:27:54,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869978299] [2020-12-23 09:27:54,814 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 09:27:54,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-23 09:27:55,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:55,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 09:27:55,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117486476] [2020-12-23 09:27:55,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 09:27:55,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:55,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 09:27:55,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-12-23 09:27:55,154 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-12-23 09:27:55,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:55,509 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-12-23 09:27:55,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 09:27:55,509 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2020-12-23 09:27:55,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:55,510 INFO L225 Difference]: With dead ends: 76 [2020-12-23 09:27:55,511 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 09:27:55,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 09:27:55,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 09:27:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-23 09:27:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 09:27:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-23 09:27:55,518 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2020-12-23 09:27:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:55,518 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-23 09:27:55,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 09:27:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-23 09:27:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 09:27:55,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:55,520 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:55,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:55,734 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:55,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:55,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2020-12-23 09:27:55,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:55,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805895613] [2020-12-23 09:27:55,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 09:27:55,803 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 09:27:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 09:27:55,857 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 09:27:55,896 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 09:27:55,896 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 09:27:55,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 09:27:55,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:27:55 BoogieIcfgContainer [2020-12-23 09:27:55,995 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:27:55,996 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:27:55,996 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:27:55,996 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:27:55,997 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:29" (3/4) ... [2020-12-23 09:27:55,999 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 09:27:56,120 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_20x0-1.c-witness.graphml [2020-12-23 09:27:56,120 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:27:56,123 INFO L168 Benchmark]: Toolchain (without parser) took 26855.78 ms. Allocated memory was 153.1 MB in the beginning and 497.0 MB in the end (delta: 343.9 MB). Free memory was 128.0 MB in the beginning and 291.9 MB in the end (delta: -164.0 MB). Peak memory consumption was 180.7 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:56,123 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:27:56,124 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.94 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 118.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:56,125 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.58 ms. Allocated memory is still 153.1 MB. Free memory was 118.6 MB in the beginning and 117.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:56,125 INFO L168 Benchmark]: Boogie Preprocessor took 20.03 ms. Allocated memory is still 153.1 MB. Free memory was 117.3 MB in the beginning and 116.3 MB in the end (delta: 930.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:56,125 INFO L168 Benchmark]: RCFGBuilder took 343.88 ms. Allocated memory is still 153.1 MB. Free memory was 116.3 MB in the beginning and 105.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:56,126 INFO L168 Benchmark]: TraceAbstraction took 26042.36 ms. Allocated memory was 153.1 MB in the beginning and 497.0 MB in the end (delta: 343.9 MB). Free memory was 104.5 MB in the beginning and 298.8 MB in the end (delta: -194.3 MB). Peak memory consumption was 150.3 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:56,126 INFO L168 Benchmark]: Witness Printer took 124.04 ms. Allocated memory is still 497.0 MB. Free memory was 298.8 MB in the beginning and 291.9 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:56,128 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 276.94 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 118.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.58 ms. Allocated memory is still 153.1 MB. Free memory was 118.6 MB in the beginning and 117.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.03 ms. Allocated memory is still 153.1 MB. Free memory was 117.3 MB in the beginning and 116.3 MB in the end (delta: 930.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 343.88 ms. Allocated memory is still 153.1 MB. Free memory was 116.3 MB in the beginning and 105.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 26042.36 ms. Allocated memory was 153.1 MB in the beginning and 497.0 MB in the end (delta: 343.9 MB). Free memory was 104.5 MB in the beginning and 298.8 MB in the end (delta: -194.3 MB). Peak memory consumption was 150.3 MB. Max. memory is 8.0 GB. * Witness Printer took 124.04 ms. Allocated memory is still 497.0 MB. Free memory was 298.8 MB in the beginning and 291.9 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 20; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.8s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 738 SDslu, 926 SDs, 0 SdLazy, 1005 SolverSat, 233 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2230 GetRequests, 1693 SyntacticMatches, 0 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4480 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 13.2s InterpolantComputationTime, 2800 NumberOfCodeBlocks, 2800 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2631 ConstructedInterpolants, 0 QuantifiedInterpolants, 588195 SizeOfPredicates, 231 NumberOfNonLiveVariables, 4522 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...