/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/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:21:44,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:21:44,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:21:44,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:21:44,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:21:44,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:21:44,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:21:44,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:21:44,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:21:44,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:21:44,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:21:44,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:21:44,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:21:44,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:21:44,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:21:44,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:21:44,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:21:44,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:21:44,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:21:44,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:21:44,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:21:44,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:21:44,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:21:44,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:21:44,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:21:44,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:21:44,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:21:44,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:21:44,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:21:44,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:21:44,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:21:44,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:21:44,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:21:44,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:21:44,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:21:44,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:21:44,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:21:44,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:21:44,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:21:44,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:21:44,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:21:44,950 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 09:21:44,976 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:21:44,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:21:44,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:21:44,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:21:44,978 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:21:44,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:21:44,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:21:44,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:21:44,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:21:44,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:21:44,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:21:44,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:21:44,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:21:44,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:21:44,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:21:44,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:21:44,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:21:44,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:21:44,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:21:44,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:21:44,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:21:44,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:21:44,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:21:44,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:21:44,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:21:44,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:21:45,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:21:45,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:21:45,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:21:45,351 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:21:45,352 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:21:45,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/recHanoi03-2.c [2020-12-23 09:21:45,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/30cf640c3/f03bda4211524388bc79e10f37b7b806/FLAGb4e0575ad [2020-12-23 09:21:45,936 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:21:45,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive/recHanoi03-2.c [2020-12-23 09:21:45,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/30cf640c3/f03bda4211524388bc79e10f37b7b806/FLAGb4e0575ad [2020-12-23 09:21:46,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/30cf640c3/f03bda4211524388bc79e10f37b7b806 [2020-12-23 09:21:46,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:21:46,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:21:46,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:21:46,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:21:46,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:21:46,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:21:46" (1/1) ... [2020-12-23 09:21:46,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ecbc31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46, skipping insertion in model container [2020-12-23 09:21:46,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:21:46" (1/1) ... [2020-12-23 09:21:46,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:21:46,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:21:46,516 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/recHanoi03-2.c[769,782] [2020-12-23 09:21:46,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:21:46,530 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:21:46,547 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/recHanoi03-2.c[769,782] [2020-12-23 09:21:46,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:21:46,563 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:21:46,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46 WrapperNode [2020-12-23 09:21:46,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:21:46,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:21:46,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:21:46,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:21:46,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46" (1/1) ... [2020-12-23 09:21:46,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46" (1/1) ... [2020-12-23 09:21:46,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:21:46,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:21:46,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:21:46,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:21:46,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46" (1/1) ... [2020-12-23 09:21:46,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46" (1/1) ... [2020-12-23 09:21:46,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46" (1/1) ... [2020-12-23 09:21:46,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46" (1/1) ... [2020-12-23 09:21:46,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46" (1/1) ... [2020-12-23 09:21:46,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46" (1/1) ... [2020-12-23 09:21:46,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46" (1/1) ... [2020-12-23 09:21:46,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:21:46,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:21:46,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:21:46,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:21:46,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46" (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 09:21:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-12-23 09:21:46,808 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-12-23 09:21:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:21:46,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:21:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:21:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:21:47,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:21:47,035 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:21:47,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:21:47 BoogieIcfgContainer [2020-12-23 09:21:47,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:21:47,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:21:47,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:21:47,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:21:47,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:21:46" (1/3) ... [2020-12-23 09:21:47,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4c7077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:21:47, skipping insertion in model container [2020-12-23 09:21:47,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:46" (2/3) ... [2020-12-23 09:21:47,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4c7077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:21:47, skipping insertion in model container [2020-12-23 09:21:47,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:21:47" (3/3) ... [2020-12-23 09:21:47,046 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-12-23 09:21:47,053 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:21:47,058 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:21:47,079 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:21:47,106 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:21:47,107 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:21:47,107 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:21:47,107 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:21:47,107 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:21:47,107 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:21:47,107 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:21:47,107 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:21:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 09:21:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 09:21:47,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:47,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:47,133 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:47,140 INFO L82 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2020-12-23 09:21:47,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:47,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820354806] [2020-12-23 09:21:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:47,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:47,395 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 09:21:47,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820354806] [2020-12-23 09:21:47,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:21:47,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:21:47,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283080633] [2020-12-23 09:21:47,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:21:47,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:47,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:21:47,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:21:47,423 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 6 states. [2020-12-23 09:21:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:47,527 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-12-23 09:21:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:21:47,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 09:21:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:47,538 INFO L225 Difference]: With dead ends: 29 [2020-12-23 09:21:47,538 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 09:21:47,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:21:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 09:21:47,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 09:21:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 09:21:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 09:21:47,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-12-23 09:21:47,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:47,591 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 09:21:47,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:21:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 09:21:47,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 09:21:47,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:47,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:47,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:21:47,594 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:47,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2020-12-23 09:21:47,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:47,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204312989] [2020-12-23 09:21:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:47,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:47,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:21:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:47,851 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 09:21:47,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204312989] [2020-12-23 09:21:47,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047992576] [2020-12-23 09:21:47,852 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 09:21:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 09:21:47,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:48,359 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 09:21:48,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:48,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 09:21:48,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797856894] [2020-12-23 09:21:48,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:21:48,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:48,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:21:48,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:21:48,367 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 14 states. [2020-12-23 09:21:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:48,519 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-23 09:21:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 09:21:48,519 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 09:21:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:48,522 INFO L225 Difference]: With dead ends: 23 [2020-12-23 09:21:48,522 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 09:21:48,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:21:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 09:21:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 09:21:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 09:21:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-23 09:21:48,536 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2020-12-23 09:21:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:48,538 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-23 09:21:48,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:21:48,538 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-23 09:21:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 09:21:48,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:48,540 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:48,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 09:21:48,755 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:48,757 INFO L82 PathProgramCache]: Analyzing trace with hash -473461948, now seen corresponding path program 2 times [2020-12-23 09:21:48,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:48,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260134980] [2020-12-23 09:21:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:48,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:48,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:21:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:48,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:21:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,032 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 09:21:49,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260134980] [2020-12-23 09:21:49,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819149172] [2020-12-23 09:21:49,034 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 09:21:49,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:21:49,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:49,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 09:21:49,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:49,330 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 09:21:49,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:49,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-23 09:21:49,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544799505] [2020-12-23 09:21:49,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 09:21:49,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:49,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 09:21:49,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:21:49,333 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2020-12-23 09:21:49,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:49,512 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-23 09:21:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 09:21:49,513 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-12-23 09:21:49,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:49,514 INFO L225 Difference]: With dead ends: 31 [2020-12-23 09:21:49,514 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 09:21:49,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-12-23 09:21:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 09:21:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 09:21:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 09:21:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-23 09:21:49,521 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2020-12-23 09:21:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:49,522 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-23 09:21:49,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 09:21:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-23 09:21:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 09:21:49,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:49,523 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:49,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:49,738 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:49,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:49,739 INFO L82 PathProgramCache]: Analyzing trace with hash 456352516, now seen corresponding path program 3 times [2020-12-23 09:21:49,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:49,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744513940] [2020-12-23 09:21:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:21:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:21:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:21:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:21:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:50,002 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 09:21:50,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744513940] [2020-12-23 09:21:50,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910967765] [2020-12-23 09:21:50,003 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 09:21:50,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 09:21:50,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:50,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 09:21:50,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 09:21:50,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 09:21:50,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 26 [2020-12-23 09:21:50,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322082857] [2020-12-23 09:21:50,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:21:50,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:50,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:21:50,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-12-23 09:21:50,542 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 14 states. [2020-12-23 09:21:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:50,580 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-23 09:21:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 09:21:50,581 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-12-23 09:21:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:50,581 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:21:50,582 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 09:21:50,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-12-23 09:21:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 09:21:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 09:21:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 09:21:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 09:21:50,584 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-12-23 09:21:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:50,584 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 09:21:50,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:21:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 09:21:50,585 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 09:21:50,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:50,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 09:21:50,819 INFO L189 CegarLoopUtils]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2020-12-23 09:21:50,819 INFO L192 CegarLoopUtils]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2020-12-23 09:21:50,820 INFO L189 CegarLoopUtils]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2020-12-23 09:21:50,820 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (= hanoi_~n |hanoi_#in~n|) [2020-12-23 09:21:50,820 INFO L189 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-12-23 09:21:50,820 INFO L189 CegarLoopUtils]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-12-23 09:21:50,820 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 09:21:50,820 INFO L189 CegarLoopUtils]: For program point L32(lines 32 36) no Hoare annotation was computed. [2020-12-23 09:21:50,820 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 09:21:50,821 INFO L185 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (<= ULTIMATE.start_main_~n~0 31) [2020-12-23 09:21:50,821 INFO L189 CegarLoopUtils]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-12-23 09:21:50,821 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 09:21:50,821 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 09:21:50,821 INFO L189 CegarLoopUtils]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-12-23 09:21:50,821 INFO L192 CegarLoopUtils]: At program point L26(lines 26 37) the Hoare annotation is: true [2020-12-23 09:21:50,822 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2020-12-23 09:21:50,822 INFO L189 CegarLoopUtils]: For program point L35(line 35) no Hoare annotation was computed. [2020-12-23 09:21:50,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:21:50 BoogieIcfgContainer [2020-12-23 09:21:50,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:21:50,834 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:21:50,834 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:21:50,834 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:21:50,835 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:21:47" (3/4) ... [2020-12-23 09:21:50,839 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 09:21:50,845 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure hanoi [2020-12-23 09:21:50,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 09:21:50,860 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 09:21:50,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:21:50,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:21:50,946 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive/recHanoi03-2.c-witness.graphml [2020-12-23 09:21:50,947 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:21:50,950 INFO L168 Benchmark]: Toolchain (without parser) took 4629.66 ms. Allocated memory was 152.0 MB in the beginning and 185.6 MB in the end (delta: 33.6 MB). Free memory was 134.3 MB in the beginning and 60.7 MB in the end (delta: 73.6 MB). Peak memory consumption was 107.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:50,950 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:21:50,951 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.83 ms. Allocated memory is still 152.0 MB. Free memory was 134.3 MB in the beginning and 124.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:50,952 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.15 ms. Allocated memory is still 152.0 MB. Free memory was 124.8 MB in the beginning and 123.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:50,953 INFO L168 Benchmark]: Boogie Preprocessor took 43.73 ms. Allocated memory is still 152.0 MB. Free memory was 123.3 MB in the beginning and 122.5 MB in the end (delta: 809.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:50,953 INFO L168 Benchmark]: RCFGBuilder took 389.57 ms. Allocated memory is still 152.0 MB. Free memory was 122.5 MB in the beginning and 124.6 MB in the end (delta: -2.0 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:50,954 INFO L168 Benchmark]: TraceAbstraction took 3794.52 ms. Allocated memory was 152.0 MB in the beginning and 185.6 MB in the end (delta: 33.6 MB). Free memory was 124.0 MB in the beginning and 63.3 MB in the end (delta: 60.7 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:50,955 INFO L168 Benchmark]: Witness Printer took 113.39 ms. Allocated memory is still 185.6 MB. Free memory was 62.8 MB in the beginning and 60.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:50,958 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 240.83 ms. Allocated memory is still 152.0 MB. Free memory was 134.3 MB in the beginning and 124.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.15 ms. Allocated memory is still 152.0 MB. Free memory was 124.8 MB in the beginning and 123.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.73 ms. Allocated memory is still 152.0 MB. Free memory was 123.3 MB in the beginning and 122.5 MB in the end (delta: 809.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 389.57 ms. Allocated memory is still 152.0 MB. Free memory was 122.5 MB in the beginning and 124.6 MB in the end (delta: -2.0 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3794.52 ms. Allocated memory was 152.0 MB in the beginning and 185.6 MB in the end (delta: 33.6 MB). Free memory was 124.0 MB in the beginning and 63.3 MB in the end (delta: 60.7 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. * Witness Printer took 113.39 ms. Allocated memory is still 185.6 MB. Free memory was 62.8 MB in the beginning and 60.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 20 SDslu, 267 SDs, 0 SdLazy, 302 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 6 PreInvPairs, 8 NumberOfFragments, 8 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 17580 SizeOfPredicates, 11 NumberOfNonLiveVariables, 266 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 96/140 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 correct! Received shutdown request...