/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/id_i20_o20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:26:41,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:26:41,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:26:41,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:26:41,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:26:41,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:26:41,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:26:41,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:26:41,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:26:41,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:26:41,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:26:41,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:26:41,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:26:41,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:26:41,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:26:41,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:26:41,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:26:41,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:26:41,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:26:41,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:26:41,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:26:41,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:26:41,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:26:41,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:26:41,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:26:41,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:26:41,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:26:41,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:26:41,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:26:41,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:26:41,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:26:41,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:26:41,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:26:41,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:26:41,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:26:41,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:26:41,862 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 09:26:41,920 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:26:41,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:26:41,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:26:41,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:26:41,924 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:26:41,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:26:41,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:26:41,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:26:41,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:26:41,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:26:41,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:26:41,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:26:41,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:26:41,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:26:41,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:26:41,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:26:41,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:26:41,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:26:41,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:26:41,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:26:41,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:26:41,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:26:41,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:26:41,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:26:41,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:26:41,932 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:26:42,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:26:42,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:26:42,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:26:42,485 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:26:42,486 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:26:42,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2020-12-23 09:26:42,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5bef476b0/a29fa46261ed4389b6dbad2e8022686e/FLAGa3ca2d53b [2020-12-23 09:26:43,317 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:26:43,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2020-12-23 09:26:43,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5bef476b0/a29fa46261ed4389b6dbad2e8022686e/FLAGa3ca2d53b [2020-12-23 09:26:43,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5bef476b0/a29fa46261ed4389b6dbad2e8022686e [2020-12-23 09:26:43,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:26:43,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:26:43,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:26:43,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:26:43,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:26:43,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42976037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43, skipping insertion in model container [2020-12-23 09:26:43,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:26:43,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:26:43,878 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/id_i20_o20-2.c[454,467] [2020-12-23 09:26:43,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:26:43,892 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:26:43,908 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/id_i20_o20-2.c[454,467] [2020-12-23 09:26:43,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:26:43,926 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:26:43,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43 WrapperNode [2020-12-23 09:26:43,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:26:43,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:26:43,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:26:43,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:26:43,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:26:43,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:26:43,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:26:43,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:26:43,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:26:43,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:26:43,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:26:43,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:26:43,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (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 09:26:44,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:26:44,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:26:44,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:26:44,124 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-23 09:26:44,124 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-23 09:26:44,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:26:44,509 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:26:44,509 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:26:44,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:44 BoogieIcfgContainer [2020-12-23 09:26:44,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:26:44,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:26:44,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:26:44,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:26:44,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:26:43" (1/3) ... [2020-12-23 09:26:44,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3fa3b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:26:44, skipping insertion in model container [2020-12-23 09:26:44,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (2/3) ... [2020-12-23 09:26:44,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3fa3b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:26:44, skipping insertion in model container [2020-12-23 09:26:44,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:44" (3/3) ... [2020-12-23 09:26:44,525 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2020-12-23 09:26:44,532 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:26:44,537 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:26:44,578 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:26:44,620 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:26:44,620 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:26:44,620 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:26:44,620 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:26:44,621 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:26:44,621 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:26:44,621 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:26:44,621 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:26:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 09:26:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:26:44,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:44,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:44,651 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:44,659 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-23 09:26:44,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:44,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733319734] [2020-12-23 09:26:44,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,077 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 09:26:45,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733319734] [2020-12-23 09:26:45,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:26:45,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:26:45,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425574760] [2020-12-23 09:26:45,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:26:45,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:45,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:26:45,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:26:45,126 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-23 09:26:45,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:45,186 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-23 09:26:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:26:45,188 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:26:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:45,199 INFO L225 Difference]: With dead ends: 28 [2020-12-23 09:26:45,199 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 09:26:45,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:26:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 09:26:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 09:26:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 09:26:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 09:26:45,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-23 09:26:45,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:45,247 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 09:26:45,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:26:45,248 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 09:26:45,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 09:26:45,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:45,249 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:45,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:26:45,250 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:45,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:45,251 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-23 09:26:45,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:45,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21576719] [2020-12-23 09:26:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,399 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 09:26:45,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21576719] [2020-12-23 09:26:45,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846947640] [2020-12-23 09:26:45,400 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 09:26:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:26:45,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:45,632 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 09:26:45,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:45,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-23 09:26:45,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390369975] [2020-12-23 09:26:45,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:26:45,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:45,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:26:45,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:26:45,636 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-12-23 09:26:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:45,731 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 09:26:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:26:45,732 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 09:26:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:45,734 INFO L225 Difference]: With dead ends: 22 [2020-12-23 09:26:45,734 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 09:26:45,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:26:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 09:26:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 09:26:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 09:26:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 09:26:45,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-23 09:26:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:45,742 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 09:26:45,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:26:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 09:26:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 09:26:45,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:45,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:45,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 09:26:45,958 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:45,960 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-23 09:26:45,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:45,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577444153] [2020-12-23 09:26:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,125 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 09:26:46,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577444153] [2020-12-23 09:26:46,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690971617] [2020-12-23 09:26:46,127 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 09:26:46,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:46,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:46,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:26:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:46,320 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 09:26:46,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:46,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-23 09:26:46,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978241177] [2020-12-23 09:26:46,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 09:26:46,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:46,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 09:26:46,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:26:46,323 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-12-23 09:26:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:46,440 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-23 09:26:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:26:46,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 09:26:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:46,445 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:26:46,446 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 09:26:46,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:26:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 09:26:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 09:26:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 09:26:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 09:26:46,470 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-23 09:26:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:46,470 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 09:26:46,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 09:26:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 09:26:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 09:26:46,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:46,474 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:46,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:46,690 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:46,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2020-12-23 09:26:46,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:46,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211522316] [2020-12-23 09:26:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,922 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 09:26:46,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211522316] [2020-12-23 09:26:46,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686181955] [2020-12-23 09:26:46,923 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 09:26:47,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 09:26:47,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:47,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 09:26:47,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:47,347 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 09:26:47,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:47,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2020-12-23 09:26:47,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251597947] [2020-12-23 09:26:47,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:26:47,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:47,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:26:47,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:26:47,351 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 17 states. [2020-12-23 09:26:47,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:47,646 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 09:26:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 09:26:47,648 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-12-23 09:26:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:47,651 INFO L225 Difference]: With dead ends: 28 [2020-12-23 09:26:47,651 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 09:26:47,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-12-23 09:26:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 09:26:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 09:26:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 09:26:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 09:26:47,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-23 09:26:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:47,669 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 09:26:47,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:26:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 09:26:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 09:26:47,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:47,674 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:47,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:47,890 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:47,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:47,892 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2020-12-23 09:26:47,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:47,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272888047] [2020-12-23 09:26:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,121 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 09:26:48,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272888047] [2020-12-23 09:26:48,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7911495] [2020-12-23 09:26:48,123 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 09:26:48,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:26:48,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:48,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 09:26:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:48,289 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 09:26:48,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:48,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-23 09:26:48,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109030085] [2020-12-23 09:26:48,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:26:48,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:48,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:26:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:26:48,293 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-12-23 09:26:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:48,389 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-23 09:26:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 09:26:48,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-23 09:26:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:48,391 INFO L225 Difference]: With dead ends: 31 [2020-12-23 09:26:48,391 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 09:26:48,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-23 09:26:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 09:26:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 09:26:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:26:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 09:26:48,399 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-23 09:26:48,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:48,399 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 09:26:48,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:26:48,399 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 09:26:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:26:48,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:48,401 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:48,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:48,617 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:48,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:48,618 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2020-12-23 09:26:48,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:48,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178927014] [2020-12-23 09:26:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,869 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 09:26:48,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178927014] [2020-12-23 09:26:48,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375046192] [2020-12-23 09:26:48,871 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 09:26:48,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 09:26:48,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:48,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 09:26:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:49,022 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 09:26:49,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:49,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-23 09:26:49,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253222153] [2020-12-23 09:26:49,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 09:26:49,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:49,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 09:26:49,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:26:49,025 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2020-12-23 09:26:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:49,117 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 09:26:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:26:49,118 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-23 09:26:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:49,119 INFO L225 Difference]: With dead ends: 34 [2020-12-23 09:26:49,119 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 09:26:49,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:26:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 09:26:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 09:26:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 09:26:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 09:26:49,127 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-12-23 09:26:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:49,128 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 09:26:49,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 09:26:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 09:26:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 09:26:49,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:49,143 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:49,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 09:26:49,353 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:49,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:49,354 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2020-12-23 09:26:49,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:49,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563919891] [2020-12-23 09:26:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,578 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 09:26:49,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563919891] [2020-12-23 09:26:49,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418134877] [2020-12-23 09:26:49,579 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 09:26:49,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 09:26:49,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:49,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 09:26:49,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:49,936 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 09:26:49,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:49,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2020-12-23 09:26:49,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432892831] [2020-12-23 09:26:49,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 09:26:49,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:49,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 09:26:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-12-23 09:26:49,940 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 26 states. [2020-12-23 09:26:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:50,278 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-23 09:26:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 09:26:50,279 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2020-12-23 09:26:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:50,280 INFO L225 Difference]: With dead ends: 37 [2020-12-23 09:26:50,280 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 09:26:50,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 09:26:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 09:26:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 09:26:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 09:26:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-23 09:26:50,289 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-12-23 09:26:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:50,289 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-23 09:26:50,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 09:26:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-23 09:26:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 09:26:50,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:50,291 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:50,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:50,507 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2020-12-23 09:26:50,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:50,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010083414] [2020-12-23 09:26:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,765 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 09:26:50,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010083414] [2020-12-23 09:26:50,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917303002] [2020-12-23 09:26:50,766 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 09:26:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 09:26:50,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:50,980 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 09:26:50,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:50,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-23 09:26:50,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400742502] [2020-12-23 09:26:50,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:26:50,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:50,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:26:50,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:26:50,985 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 14 states. [2020-12-23 09:26:51,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:51,113 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-23 09:26:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 09:26:51,114 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-12-23 09:26:51,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:51,117 INFO L225 Difference]: With dead ends: 40 [2020-12-23 09:26:51,118 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 09:26:51,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:26:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 09:26:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 09:26:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 09:26:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 09:26:51,131 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-12-23 09:26:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:51,132 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 09:26:51,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:26:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 09:26:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 09:26:51,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:51,136 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:51,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:51,350 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:51,351 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2020-12-23 09:26:51,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:51,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097983614] [2020-12-23 09:26:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,611 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 09:26:51,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097983614] [2020-12-23 09:26:51,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785402511] [2020-12-23 09:26:51,612 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 09:26:51,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:51,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:51,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 09:26:51,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:51,821 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 09:26:51,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:51,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-23 09:26:51,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674937952] [2020-12-23 09:26:51,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 09:26:51,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 09:26:51,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:26:51,825 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2020-12-23 09:26:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:51,974 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-23 09:26:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 09:26:51,975 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-12-23 09:26:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:51,976 INFO L225 Difference]: With dead ends: 43 [2020-12-23 09:26:51,977 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 09:26:51,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-12-23 09:26:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 09:26:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 09:26:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 09:26:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-23 09:26:51,985 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-12-23 09:26:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:51,986 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-23 09:26:51,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 09:26:51,986 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-23 09:26:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 09:26:51,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:51,988 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:52,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 09:26:52,202 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:52,203 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2020-12-23 09:26:52,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:52,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730883838] [2020-12-23 09:26:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,507 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 09:26:52,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730883838] [2020-12-23 09:26:52,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59984169] [2020-12-23 09:26:52,508 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 09:26:52,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 09:26:52,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:52,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 09:26:52,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:53,111 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 09:26:53,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:53,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2020-12-23 09:26:53,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614967073] [2020-12-23 09:26:53,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 09:26:53,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:53,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 09:26:53,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 09:26:53,115 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 35 states. [2020-12-23 09:26:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:53,667 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-23 09:26:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 09:26:53,668 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 64 [2020-12-23 09:26:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:53,669 INFO L225 Difference]: With dead ends: 46 [2020-12-23 09:26:53,669 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 09:26:53,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 09:26:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 09:26:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 09:26:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 09:26:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-23 09:26:53,678 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-12-23 09:26:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:53,678 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-23 09:26:53,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 09:26:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-23 09:26:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 09:26:53,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:53,680 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:53,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:53,896 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2020-12-23 09:26:53,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:53,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459066278] [2020-12-23 09:26:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,238 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 09:26:54,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459066278] [2020-12-23 09:26:54,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906778544] [2020-12-23 09:26:54,239 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 09:26:54,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:26:54,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:54,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 09:26:54,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:54,468 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 09:26:54,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:54,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-23 09:26:54,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219747001] [2020-12-23 09:26:54,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:26:54,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:54,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:26:54,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:26:54,470 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 17 states. [2020-12-23 09:26:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:54,621 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-12-23 09:26:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 09:26:54,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-12-23 09:26:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:54,623 INFO L225 Difference]: With dead ends: 49 [2020-12-23 09:26:54,623 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 09:26:54,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-12-23 09:26:54,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 09:26:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 09:26:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 09:26:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-23 09:26:54,630 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-12-23 09:26:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:54,631 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-23 09:26:54,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:26:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-23 09:26:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 09:26:54,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:54,633 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:54,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:54,846 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:54,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2020-12-23 09:26:54,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:54,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515779861] [2020-12-23 09:26:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,274 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 09:26:55,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515779861] [2020-12-23 09:26:55,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228452414] [2020-12-23 09:26:55,275 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 09:26:55,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 09:26:55,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 09:26:55,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:55,506 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 09:26:55,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:55,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-23 09:26:55,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588910251] [2020-12-23 09:26:55,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 09:26:55,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:55,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 09:26:55,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:26:55,509 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2020-12-23 09:26:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:55,701 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 09:26:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:26:55,702 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-12-23 09:26:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:55,703 INFO L225 Difference]: With dead ends: 52 [2020-12-23 09:26:55,703 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 09:26:55,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-12-23 09:26:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 09:26:55,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 09:26:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 09:26:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 09:26:55,711 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-12-23 09:26:55,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:55,711 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 09:26:55,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 09:26:55,712 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 09:26:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 09:26:55,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:55,713 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:55,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 09:26:55,927 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:55,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2020-12-23 09:26:55,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:55,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938471618] [2020-12-23 09:26:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,477 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 09:26:56,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938471618] [2020-12-23 09:26:56,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740813028] [2020-12-23 09:26:56,478 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 09:26:56,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 09:26:56,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:56,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 09:26:56,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:56,720 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 09:26:56,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:56,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-23 09:26:56,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751057940] [2020-12-23 09:26:56,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 09:26:56,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:56,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 09:26:56,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:26:56,722 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 19 states. [2020-12-23 09:26:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:56,936 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-23 09:26:56,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 09:26:56,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-12-23 09:26:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:56,945 INFO L225 Difference]: With dead ends: 55 [2020-12-23 09:26:56,945 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 09:26:56,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-12-23 09:26:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 09:26:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 09:26:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 09:26:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-23 09:26:56,955 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-12-23 09:26:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:56,955 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-23 09:26:56,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 09:26:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-23 09:26:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 09:26:56,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:56,957 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:57,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 09:26:57,171 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:57,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:57,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2020-12-23 09:26:57,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:57,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075344493] [2020-12-23 09:26:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,767 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 09:26:57,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075344493] [2020-12-23 09:26:57,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113909139] [2020-12-23 09:26:57,772 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 09:26:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 09:26:57,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:58,061 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 09:26:58,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:58,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-23 09:26:58,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769531960] [2020-12-23 09:26:58,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 09:26:58,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:58,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 09:26:58,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-12-23 09:26:58,063 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-12-23 09:26:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:58,294 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-23 09:26:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 09:26:58,295 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2020-12-23 09:26:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:58,296 INFO L225 Difference]: With dead ends: 58 [2020-12-23 09:26:58,296 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 09:26:58,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 09:26:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 09:26:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 09:26:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 09:26:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-23 09:26:58,304 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-12-23 09:26:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:58,304 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-23 09:26:58,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 09:26:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-23 09:26:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 09:26:58,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:58,306 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:58,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 09:26:58,522 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:58,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2020-12-23 09:26:58,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:58,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192199639] [2020-12-23 09:26:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,190 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 09:26:59,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192199639] [2020-12-23 09:26:59,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203692824] [2020-12-23 09:26:59,191 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 09:26:59,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:59,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:59,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 09:26:59,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:59,480 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 09:26:59,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:59,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-12-23 09:26:59,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086827924] [2020-12-23 09:26:59,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 09:26:59,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:59,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 09:26:59,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:26:59,483 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 21 states. [2020-12-23 09:26:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:59,728 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-23 09:26:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 09:26:59,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2020-12-23 09:26:59,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:59,730 INFO L225 Difference]: With dead ends: 61 [2020-12-23 09:26:59,730 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 09:26:59,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 09:26:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 09:26:59,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 09:26:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 09:26:59,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-23 09:26:59,740 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-12-23 09:26:59,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:59,740 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-23 09:26:59,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 09:26:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-23 09:26:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 09:26:59,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:59,742 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:59,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:59,960 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2020-12-23 09:26:59,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:59,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091995087] [2020-12-23 09:26:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,589 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 09:27:00,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091995087] [2020-12-23 09:27:00,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228176047] [2020-12-23 09:27:00,590 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 09:27:00,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 09:27:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:00,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 09:27:00,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:00,875 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 09:27:00,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:00,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-23 09:27:00,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901400336] [2020-12-23 09:27:00,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 09:27:00,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:00,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 09:27:00,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:27:00,877 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 22 states. [2020-12-23 09:27:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:01,124 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-12-23 09:27:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 09:27:01,125 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2020-12-23 09:27:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:01,126 INFO L225 Difference]: With dead ends: 64 [2020-12-23 09:27:01,126 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 09:27:01,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 09:27:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 09:27:01,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 09:27:01,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 09:27:01,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-23 09:27:01,133 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-12-23 09:27:01,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:01,133 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-23 09:27:01,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 09:27:01,133 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-23 09:27:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 09:27:01,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:01,135 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:01,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 09:27:01,348 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:01,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:01,349 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2020-12-23 09:27:01,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:01,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452687502] [2020-12-23 09:27:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,983 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 09:27:01,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452687502] [2020-12-23 09:27:01,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061757952] [2020-12-23 09:27:01,984 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 09:27:02,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:27:02,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:02,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 09:27:02,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:02,257 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 09:27:02,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:02,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-12-23 09:27:02,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706743695] [2020-12-23 09:27:02,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 09:27:02,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:02,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 09:27:02,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-12-23 09:27:02,260 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 23 states. [2020-12-23 09:27:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:02,546 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-23 09:27:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 09:27:02,546 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-12-23 09:27:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:02,548 INFO L225 Difference]: With dead ends: 67 [2020-12-23 09:27:02,548 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 09:27:02,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 09:27:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 09:27:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 09:27:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 09:27:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-23 09:27:02,555 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2020-12-23 09:27:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:02,556 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-23 09:27:02,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 09:27:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-23 09:27:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 09:27:02,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:02,558 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:02,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 09:27:02,772 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:02,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:02,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2020-12-23 09:27:02,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:02,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604099820] [2020-12-23 09:27:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,462 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 09:27:03,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604099820] [2020-12-23 09:27:03,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780978082] [2020-12-23 09:27:03,462 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 09:27:03,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 09:27:03,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:03,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 09:27:03,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:03,757 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 09:27:03,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:03,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-12-23 09:27:03,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327336111] [2020-12-23 09:27:03,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 09:27:03,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:03,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 09:27:03,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-12-23 09:27:03,759 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 24 states. [2020-12-23 09:27:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:04,032 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-12-23 09:27:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 09:27:04,032 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-12-23 09:27:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:04,035 INFO L225 Difference]: With dead ends: 70 [2020-12-23 09:27:04,035 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 09:27:04,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 09:27:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 09:27:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-23 09:27:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 09:27:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-23 09:27:04,046 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2020-12-23 09:27:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:04,047 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-23 09:27:04,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 09:27:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-23 09:27:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 09:27:04,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:04,049 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:04,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 09:27:04,264 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:04,265 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2020-12-23 09:27:04,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:04,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168871404] [2020-12-23 09:27:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,012 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 09:27:05,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168871404] [2020-12-23 09:27:05,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823391360] [2020-12-23 09:27:05,013 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 09:27:05,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 09:27:05,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:05,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 09:27:05,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:06,435 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 09:27:06,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:06,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2020-12-23 09:27:06,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767724671] [2020-12-23 09:27:06,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 09:27:06,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 09:27:06,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 09:27:06,439 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 62 states. [2020-12-23 09:27:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:07,885 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-23 09:27:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 09:27:07,886 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 118 [2020-12-23 09:27:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:07,887 INFO L225 Difference]: With dead ends: 73 [2020-12-23 09:27:07,887 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 09:27:07,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2020-12-23 09:27:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 09:27:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-23 09:27:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 09:27:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-23 09:27:07,900 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2020-12-23 09:27:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:07,901 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-23 09:27:07,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 09:27:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-23 09:27:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 09:27:07,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:07,905 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:08,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:08,119 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:08,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:08,120 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2020-12-23 09:27:08,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:08,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077833795] [2020-12-23 09:27:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,949 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 09:27:08,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077833795] [2020-12-23 09:27:08,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039130226] [2020-12-23 09:27:08,950 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 09:27:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 09:27:09,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:09,206 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 09:27:09,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:09,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-12-23 09:27:09,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865750340] [2020-12-23 09:27:09,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 09:27:09,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:09,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 09:27:09,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-12-23 09:27:09,209 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 26 states. [2020-12-23 09:27:09,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:09,536 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-12-23 09:27:09,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 09:27:09,537 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 124 [2020-12-23 09:27:09,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:09,539 INFO L225 Difference]: With dead ends: 76 [2020-12-23 09:27:09,539 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 09:27:09,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 09:27:09,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 09:27:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-23 09:27:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 09:27:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-23 09:27:09,546 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2020-12-23 09:27:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:09,546 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-23 09:27:09,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 09:27:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-23 09:27:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 09:27:09,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:09,548 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:09,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:09,764 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:09,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:09,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2020-12-23 09:27:09,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:09,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109227293] [2020-12-23 09:27:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 09:27:09,791 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 09:27:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 09:27:09,829 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 09:27:09,865 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 09:27:09,865 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 09:27:09,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 09:27:09,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:27:09 BoogieIcfgContainer [2020-12-23 09:27:09,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:27:09,960 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:27:09,960 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:27:09,960 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:27:09,961 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:44" (3/4) ... [2020-12-23 09:27:09,963 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 09:27:10,092 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/id_i20_o20-2.c-witness.graphml [2020-12-23 09:27:10,093 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:27:10,100 INFO L168 Benchmark]: Toolchain (without parser) took 26402.14 ms. Allocated memory was 151.0 MB in the beginning and 475.0 MB in the end (delta: 324.0 MB). Free memory was 126.8 MB in the beginning and 231.1 MB in the end (delta: -104.3 MB). Peak memory consumption was 220.6 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:10,100 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 123.9 MB in the beginning and 123.8 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:27:10,102 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.99 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:10,102 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.42 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:10,103 INFO L168 Benchmark]: Boogie Preprocessor took 21.14 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 115.1 MB in the end (delta: 951.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:10,103 INFO L168 Benchmark]: RCFGBuilder took 527.34 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 104.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:10,103 INFO L168 Benchmark]: TraceAbstraction took 25443.91 ms. Allocated memory was 151.0 MB in the beginning and 475.0 MB in the end (delta: 324.0 MB). Free memory was 103.7 MB in the beginning and 236.9 MB in the end (delta: -133.2 MB). Peak memory consumption was 191.3 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:10,104 INFO L168 Benchmark]: Witness Printer took 133.02 ms. Allocated memory is still 475.0 MB. Free memory was 236.9 MB in the beginning and 231.1 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:10,106 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 123.9 MB in the beginning and 123.8 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 232.99 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.42 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.14 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 115.1 MB in the end (delta: 951.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 527.34 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 104.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25443.91 ms. Allocated memory was 151.0 MB in the beginning and 475.0 MB in the end (delta: 324.0 MB). Free memory was 103.7 MB in the beginning and 236.9 MB in the end (delta: -133.2 MB). Peak memory consumption was 191.3 MB. Max. memory is 8.0 GB. * Witness Printer took 133.02 ms. Allocated memory is still 475.0 MB. Free memory was 236.9 MB in the beginning and 231.1 MB in the end (delta: 5.8 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 20; [L13] CALL, EXPR id(input) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 20 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.2s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 201 SDtfs, 672 SDslu, 1298 SDs, 0 SdLazy, 1110 SolverSat, 190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2247 GetRequests, 1638 SyntacticMatches, 0 SemanticMatches, 609 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5236 ImplicationChecksByTransitivity, 8.9s 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: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 12.8s InterpolantComputationTime, 2800 NumberOfCodeBlocks, 2800 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2631 ConstructedInterpolants, 0 QuantifiedInterpolants, 561591 SizeOfPredicates, 184 NumberOfNonLiveVariables, 3667 ConjunctsInSsa, 456 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...