/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/fibo_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:26:10,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:26:10,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:26:10,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:26:10,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:26:10,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:26:10,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:26:10,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:26:10,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:26:10,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:26:10,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:26:10,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:26:10,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:26:10,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:26:10,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:26:10,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:26:10,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:26:10,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:26:10,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:26:10,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:26:10,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:26:10,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:26:10,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:26:10,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:26:10,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:26:10,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:26:10,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:26:10,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:26:10,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:26:10,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:26:10,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:26:10,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:26:10,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:26:10,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:26:10,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:26:10,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:26:10,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:26:10,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:26:10,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:26:10,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:26:10,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:26:10,401 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 09:26:10,457 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:26:10,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:26:10,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:26:10,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:26:10,463 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:26:10,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:26:10,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:26:10,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:26:10,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:26:10,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:26:10,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:26:10,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:26:10,466 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:26:10,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:26:10,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:26:10,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:26:10,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:26:10,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:26:10,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:26:10,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:26:10,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:26:10,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:26:10,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:26:10,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:26:10,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:26:10,470 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:26:10,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:26:11,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:26:11,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:26:11,009 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:26:11,010 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:26:11,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2020-12-23 09:26:11,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ccb11181d/0cfd5791c82e47cbabb818e30ec036ca/FLAG38d6862f1 [2020-12-23 09:26:11,704 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:26:11,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2020-12-23 09:26:11,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ccb11181d/0cfd5791c82e47cbabb818e30ec036ca/FLAG38d6862f1 [2020-12-23 09:26:12,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ccb11181d/0cfd5791c82e47cbabb818e30ec036ca [2020-12-23 09:26:12,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:26:12,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:26:12,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:26:12,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:26:12,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:26:12,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:26:12" (1/1) ... [2020-12-23 09:26:12,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77bd5102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12, skipping insertion in model container [2020-12-23 09:26:12,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:26:12" (1/1) ... [2020-12-23 09:26:12,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:26:12,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:26:12,256 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/fibo_7-1.c[741,754] [2020-12-23 09:26:12,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:26:12,272 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:26:12,289 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/fibo_7-1.c[741,754] [2020-12-23 09:26:12,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:26:12,308 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:26:12,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12 WrapperNode [2020-12-23 09:26:12,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:26:12,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:26:12,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:26:12,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:26:12,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12" (1/1) ... [2020-12-23 09:26:12,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12" (1/1) ... [2020-12-23 09:26:12,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:26:12,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:26:12,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:26:12,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:26:12,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12" (1/1) ... [2020-12-23 09:26:12,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12" (1/1) ... [2020-12-23 09:26:12,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12" (1/1) ... [2020-12-23 09:26:12,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12" (1/1) ... [2020-12-23 09:26:12,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12" (1/1) ... [2020-12-23 09:26:12,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12" (1/1) ... [2020-12-23 09:26:12,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12" (1/1) ... [2020-12-23 09:26:12,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:26:12,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:26:12,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:26:12,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:26:12,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12" (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 09:26:12,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:26:12,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:26:12,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:26:12,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:26:12,507 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-12-23 09:26:12,508 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-12-23 09:26:12,773 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:26:12,774 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:26:12,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:12 BoogieIcfgContainer [2020-12-23 09:26:12,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:26:12,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:26:12,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:26:12,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:26:12,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:26:12" (1/3) ... [2020-12-23 09:26:12,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d054f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:26:12, skipping insertion in model container [2020-12-23 09:26:12,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:12" (2/3) ... [2020-12-23 09:26:12,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d054f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:26:12, skipping insertion in model container [2020-12-23 09:26:12,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:12" (3/3) ... [2020-12-23 09:26:12,788 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2020-12-23 09:26:12,797 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:26:12,804 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:26:12,829 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:26:12,872 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:26:12,873 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:26:12,873 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:26:12,873 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:26:12,873 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:26:12,873 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:26:12,874 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:26:12,874 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:26:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 09:26:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:26:12,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:12,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:12,937 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1755511548, now seen corresponding path program 1 times [2020-12-23 09:26:12,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:12,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045279004] [2020-12-23 09:26:12,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:13,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:13,449 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 09:26:13,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045279004] [2020-12-23 09:26:13,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:26:13,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:26:13,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826080184] [2020-12-23 09:26:13,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:26:13,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:26:13,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:26:13,493 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-12-23 09:26:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:13,625 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-12-23 09:26:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:26:13,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:26:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:13,638 INFO L225 Difference]: With dead ends: 30 [2020-12-23 09:26:13,638 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 09:26:13,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:26:13,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 09:26:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 09:26:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 09:26:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-23 09:26:13,692 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2020-12-23 09:26:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:13,692 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-23 09:26:13,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:26:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-23 09:26:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 09:26:13,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:13,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:13,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:26:13,695 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:13,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:13,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459596, now seen corresponding path program 1 times [2020-12-23 09:26:13,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:13,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847213091] [2020-12-23 09:26:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:13,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:13,759 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 09:26:13,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847213091] [2020-12-23 09:26:13,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:26:13,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:26:13,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072545966] [2020-12-23 09:26:13,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:26:13,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:13,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:26:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:26:13,764 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-12-23 09:26:13,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:13,821 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-12-23 09:26:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:26:13,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 09:26:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:13,823 INFO L225 Difference]: With dead ends: 24 [2020-12-23 09:26:13,824 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 09:26:13,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:26:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 09:26:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-23 09:26:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 09:26:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-23 09:26:13,833 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2020-12-23 09:26:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:13,834 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-23 09:26:13,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:26:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-23 09:26:13,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 09:26:13,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:13,836 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:13,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:26:13,837 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:13,837 INFO L82 PathProgramCache]: Analyzing trace with hash -42544313, now seen corresponding path program 1 times [2020-12-23 09:26:13,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:13,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097478123] [2020-12-23 09:26:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:13,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:13,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:13,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-23 09:26:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 09:26:13,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097478123] [2020-12-23 09:26:13,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270998911] [2020-12-23 09:26:13,955 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 09:26:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:14,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:26:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 09:26:14,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:14,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-23 09:26:14,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552009784] [2020-12-23 09:26:14,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 09:26:14,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:14,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 09:26:14,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:26:14,242 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 9 states. [2020-12-23 09:26:14,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:14,427 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-12-23 09:26:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 09:26:14,428 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-12-23 09:26:14,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:14,430 INFO L225 Difference]: With dead ends: 35 [2020-12-23 09:26:14,430 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 09:26:14,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:26:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 09:26:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 09:26:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 09:26:14,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-23 09:26:14,446 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2020-12-23 09:26:14,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:14,449 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-23 09:26:14,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 09:26:14,449 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-23 09:26:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 09:26:14,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:14,454 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:14,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 09:26:14,670 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:14,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:14,671 INFO L82 PathProgramCache]: Analyzing trace with hash 170813287, now seen corresponding path program 1 times [2020-12-23 09:26:14,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:14,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266079492] [2020-12-23 09:26:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:14,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:14,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:14,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 09:26:14,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266079492] [2020-12-23 09:26:14,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798214840] [2020-12-23 09:26:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:14,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:26:14,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 09:26:14,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:14,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-12-23 09:26:14,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760834540] [2020-12-23 09:26:14,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:26:14,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:14,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:26:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:26:14,986 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 8 states. [2020-12-23 09:26:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:15,092 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-12-23 09:26:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:26:15,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-23 09:26:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:15,095 INFO L225 Difference]: With dead ends: 38 [2020-12-23 09:26:15,095 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 09:26:15,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:26:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 09:26:15,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-23 09:26:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 09:26:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2020-12-23 09:26:15,106 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 24 [2020-12-23 09:26:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:15,107 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2020-12-23 09:26:15,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:26:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2020-12-23 09:26:15,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 09:26:15,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:15,109 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:15,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:15,324 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:15,325 INFO L82 PathProgramCache]: Analyzing trace with hash -187634876, now seen corresponding path program 2 times [2020-12-23 09:26:15,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:15,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055363243] [2020-12-23 09:26:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:15,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:15,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:15,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:15,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:15,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 09:26:15,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055363243] [2020-12-23 09:26:15,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005942378] [2020-12-23 09:26:15,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:15,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:15,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:15,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:26:15,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 09:26:15,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:15,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-23 09:26:15,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850985869] [2020-12-23 09:26:15,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 09:26:15,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 09:26:15,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:26:15,900 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 13 states. [2020-12-23 09:26:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:16,143 INFO L93 Difference]: Finished difference Result 69 states and 106 transitions. [2020-12-23 09:26:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 09:26:16,144 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-12-23 09:26:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:16,146 INFO L225 Difference]: With dead ends: 69 [2020-12-23 09:26:16,146 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 09:26:16,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:26:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 09:26:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 09:26:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 09:26:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-12-23 09:26:16,156 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2020-12-23 09:26:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:16,156 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-12-23 09:26:16,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 09:26:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-12-23 09:26:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 09:26:16,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:16,160 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:16,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:16,375 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:16,376 INFO L82 PathProgramCache]: Analyzing trace with hash 366248375, now seen corresponding path program 3 times [2020-12-23 09:26:16,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:16,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101190998] [2020-12-23 09:26:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-23 09:26:16,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101190998] [2020-12-23 09:26:16,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986596415] [2020-12-23 09:26:16,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:16,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 09:26:16,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:16,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:26:16,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 89 proven. 32 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-12-23 09:26:16,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:16,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 13 [2020-12-23 09:26:16,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496165945] [2020-12-23 09:26:16,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 09:26:16,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:16,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 09:26:16,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:26:16,840 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 13 states. [2020-12-23 09:26:17,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:17,014 INFO L93 Difference]: Finished difference Result 94 states and 140 transitions. [2020-12-23 09:26:17,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 09:26:17,015 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-12-23 09:26:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:17,020 INFO L225 Difference]: With dead ends: 94 [2020-12-23 09:26:17,020 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 09:26:17,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:26:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 09:26:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-12-23 09:26:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 09:26:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 124 transitions. [2020-12-23 09:26:17,055 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 124 transitions. Word has length 79 [2020-12-23 09:26:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:17,058 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 124 transitions. [2020-12-23 09:26:17,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 09:26:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 124 transitions. [2020-12-23 09:26:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-23 09:26:17,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:17,072 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:17,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:17,287 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:17,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1022210831, now seen corresponding path program 4 times [2020-12-23 09:26:17,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:17,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871831931] [2020-12-23 09:26:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-12-23 09:26:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:17,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:18,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:18,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:18,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:18,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:18,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:18,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:18,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 403 proven. 706 refuted. 0 times theorem prover too weak. 1471 trivial. 0 not checked. [2020-12-23 09:26:18,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871831931] [2020-12-23 09:26:18,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546166957] [2020-12-23 09:26:18,230 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 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 09:26:18,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:26:18,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:18,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 09:26:18,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 716 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2020-12-23 09:26:18,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:18,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 22 [2020-12-23 09:26:18,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288841167] [2020-12-23 09:26:18,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 09:26:18,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:18,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 09:26:18,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:26:18,655 INFO L87 Difference]: Start difference. First operand 84 states and 124 transitions. Second operand 22 states. [2020-12-23 09:26:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:19,158 INFO L93 Difference]: Finished difference Result 170 states and 315 transitions. [2020-12-23 09:26:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 09:26:19,159 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 215 [2020-12-23 09:26:19,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:19,170 INFO L225 Difference]: With dead ends: 170 [2020-12-23 09:26:19,171 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 09:26:19,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 09:26:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 09:26:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2020-12-23 09:26:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 09:26:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 106 transitions. [2020-12-23 09:26:19,196 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 106 transitions. Word has length 215 [2020-12-23 09:26:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:19,196 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 106 transitions. [2020-12-23 09:26:19,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 09:26:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 106 transitions. [2020-12-23 09:26:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-12-23 09:26:19,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:19,200 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:19,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 09:26:19,411 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:19,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1099173212, now seen corresponding path program 5 times [2020-12-23 09:26:19,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:19,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034002645] [2020-12-23 09:26:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:19,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:19,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:19,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-12-23 09:26:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-12-23 09:26:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:20,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-12-23 09:26:21,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034002645] [2020-12-23 09:26:21,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816302263] [2020-12-23 09:26:21,111 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 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 09:26:21,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-23 09:26:21,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 167 conjunts are in the unsatisfiable core [2020-12-23 09:26:21,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-12-23 09:26:22,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:22,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-12-23 09:26:22,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099037229] [2020-12-23 09:26:22,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 09:26:22,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:22,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 09:26:22,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-12-23 09:26:22,433 INFO L87 Difference]: Start difference. First operand 77 states and 106 transitions. Second operand 28 states. [2020-12-23 09:26:22,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:22,910 INFO L93 Difference]: Finished difference Result 120 states and 186 transitions. [2020-12-23 09:26:22,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 09:26:22,911 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 283 [2020-12-23 09:26:22,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:22,918 INFO L225 Difference]: With dead ends: 120 [2020-12-23 09:26:22,918 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 09:26:22,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 401 SyntacticMatches, 22 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-12-23 09:26:22,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 09:26:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 100. [2020-12-23 09:26:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 09:26:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 154 transitions. [2020-12-23 09:26:22,974 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 154 transitions. Word has length 283 [2020-12-23 09:26:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:22,976 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 154 transitions. [2020-12-23 09:26:22,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 09:26:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 154 transitions. [2020-12-23 09:26:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-12-23 09:26:22,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:22,986 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 35, 21, 21, 21, 21, 21, 21, 21, 14, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:23,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:23,201 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:23,202 INFO L82 PathProgramCache]: Analyzing trace with hash 122296983, now seen corresponding path program 6 times [2020-12-23 09:26:23,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:23,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030398944] [2020-12-23 09:26:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-12-23 09:26:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-12-23 09:26:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:23,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-12-23 09:26:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-12-23 09:26:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 903 proven. 1158 refuted. 0 times theorem prover too weak. 2986 trivial. 0 not checked. [2020-12-23 09:26:24,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030398944] [2020-12-23 09:26:24,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308668732] [2020-12-23 09:26:24,287 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 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 09:26:24,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-23 09:26:24,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:26:24,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 2214 proven. 16 refuted. 0 times theorem prover too weak. 2817 trivial. 0 not checked. [2020-12-23 09:26:24,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:24,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 25 [2020-12-23 09:26:24,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341517001] [2020-12-23 09:26:24,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 09:26:24,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 09:26:24,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-12-23 09:26:24,740 INFO L87 Difference]: Start difference. First operand 100 states and 154 transitions. Second operand 25 states. [2020-12-23 09:26:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:25,409 INFO L93 Difference]: Finished difference Result 209 states and 395 transitions. [2020-12-23 09:26:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 09:26:25,410 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 297 [2020-12-23 09:26:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:25,413 INFO L225 Difference]: With dead ends: 209 [2020-12-23 09:26:25,413 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 09:26:25,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=529, Invalid=1727, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 09:26:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 09:26:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 103. [2020-12-23 09:26:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 09:26:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2020-12-23 09:26:25,434 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 297 [2020-12-23 09:26:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:25,434 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2020-12-23 09:26:25,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 09:26:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2020-12-23 09:26:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-12-23 09:26:25,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:25,441 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:25,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:25,656 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:25,657 INFO L82 PathProgramCache]: Analyzing trace with hash 584117127, now seen corresponding path program 7 times [2020-12-23 09:26:25,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:25,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664597276] [2020-12-23 09:26:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:25,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:25,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:25,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-12-23 09:26:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-12-23 09:26:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-12-23 09:26:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 614 proven. 1112 refuted. 0 times theorem prover too weak. 4313 trivial. 0 not checked. [2020-12-23 09:26:26,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664597276] [2020-12-23 09:26:26,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036269122] [2020-12-23 09:26:26,637 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 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 09:26:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:26,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 09:26:26,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 381 proven. 1369 refuted. 0 times theorem prover too weak. 4289 trivial. 0 not checked. [2020-12-23 09:26:27,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:27,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2020-12-23 09:26:27,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636174254] [2020-12-23 09:26:27,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 09:26:27,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:27,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 09:26:27,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:26:27,109 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand 22 states. [2020-12-23 09:26:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:27,613 INFO L93 Difference]: Finished difference Result 203 states and 335 transitions. [2020-12-23 09:26:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 09:26:27,613 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 324 [2020-12-23 09:26:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:27,614 INFO L225 Difference]: With dead ends: 203 [2020-12-23 09:26:27,614 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 09:26:27,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2020-12-23 09:26:27,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 09:26:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 09:26:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 09:26:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 09:26:27,617 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 324 [2020-12-23 09:26:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:27,617 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 09:26:27,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 09:26:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 09:26:27,618 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 09:26:27,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 09:26:27,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 09:26:28,158 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 7 [2020-12-23 09:26:28,570 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 42 [2020-12-23 09:26:28,578 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 09:26:28,578 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 09:26:28,578 INFO L185 CegarLoopUtils]: At program point L31(lines 25 32) the Hoare annotation is: (<= 7 ULTIMATE.start_main_~x~0) [2020-12-23 09:26:28,579 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 09:26:28,579 INFO L189 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2020-12-23 09:26:28,579 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 09:26:28,579 INFO L189 CegarLoopUtils]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-12-23 09:26:28,579 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 7) (<= 7 ULTIMATE.start_main_~x~0)) [2020-12-23 09:26:28,579 INFO L189 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-12-23 09:26:28,579 INFO L189 CegarLoopUtils]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2020-12-23 09:26:28,579 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2020-12-23 09:26:28,580 INFO L189 CegarLoopUtils]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2020-12-23 09:26:28,580 INFO L189 CegarLoopUtils]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2020-12-23 09:26:28,580 INFO L185 CegarLoopUtils]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo_#in~n| 1)) (= fibo_~n |fibo_#in~n|)) [2020-12-23 09:26:28,580 INFO L189 CegarLoopUtils]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-12-23 09:26:28,580 INFO L185 CegarLoopUtils]: At program point L13-2(line 13) the Hoare annotation is: (and (< 1 fibo_~n) (or (and (<= |fibo_#t~ret7| 2) (<= fibo_~n 4) (<= 2 |fibo_#t~ret7|) (<= 4 |fibo_#in~n|)) (and (<= 5 fibo_~n) (<= |fibo_#t~ret7| 3) (<= 3 |fibo_#t~ret7|)) (and (<= |fibo_#t~ret7| 1) (<= 1 |fibo_#t~ret7|) (<= |fibo_#in~n| 3)) (<= 6 |fibo_#in~n|)) (let ((.cse0 (= fibo_~n |fibo_#in~n|))) (or (and (<= |fibo_#t~ret7| 8) (<= 8 |fibo_#t~ret7|) .cse0 (<= 7 |fibo_#in~n|)) (and .cse0 (<= 8 |fibo_#in~n|)) (and .cse0 (<= |fibo_#in~n| 5)) (and (<= 5 |fibo_#t~ret7|) (<= |fibo_#t~ret7| 5) (<= |fibo_#in~n| 6) .cse0)))) [2020-12-23 09:26:28,580 INFO L189 CegarLoopUtils]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-12-23 09:26:28,581 INFO L189 CegarLoopUtils]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-12-23 09:26:28,581 INFO L189 CegarLoopUtils]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-12-23 09:26:28,581 INFO L192 CegarLoopUtils]: At program point fiboENTRY(lines 7 15) the Hoare annotation is: true [2020-12-23 09:26:28,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:26:28 BoogieIcfgContainer [2020-12-23 09:26:28,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:26:28,606 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:26:28,607 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:26:28,607 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:26:28,608 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:12" (3/4) ... [2020-12-23 09:26:28,613 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 09:26:28,622 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2020-12-23 09:26:28,628 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 09:26:28,628 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 09:26:28,629 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:26:28,629 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:26:28,696 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/fibo_7-1.c-witness.graphml [2020-12-23 09:26:28,696 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:26:28,698 INFO L168 Benchmark]: Toolchain (without parser) took 16638.29 ms. Allocated memory was 151.0 MB in the beginning and 470.8 MB in the end (delta: 319.8 MB). Free memory was 127.6 MB in the beginning and 273.2 MB in the end (delta: -145.6 MB). Peak memory consumption was 175.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:28,699 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 130.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:26:28,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.07 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 118.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:28,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.18 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:28,702 INFO L168 Benchmark]: Boogie Preprocessor took 23.15 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.8 MB in the end (delta: 913.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:28,705 INFO L168 Benchmark]: RCFGBuilder took 399.67 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 104.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:28,705 INFO L168 Benchmark]: TraceAbstraction took 15827.72 ms. Allocated memory was 151.0 MB in the beginning and 470.8 MB in the end (delta: 319.8 MB). Free memory was 103.7 MB in the beginning and 275.8 MB in the end (delta: -172.0 MB). Peak memory consumption was 148.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:28,706 INFO L168 Benchmark]: Witness Printer took 89.85 ms. Allocated memory is still 470.8 MB. Free memory was 275.8 MB in the beginning and 273.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:28,708 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 130.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.07 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 118.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.18 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.15 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.8 MB in the end (delta: 913.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 399.67 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 104.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15827.72 ms. Allocated memory was 151.0 MB in the beginning and 470.8 MB in the end (delta: 319.8 MB). Free memory was 103.7 MB in the beginning and 275.8 MB in the end (delta: -172.0 MB). Peak memory consumption was 148.1 MB. Max. memory is 8.0 GB. * Witness Printer took 89.85 ms. Allocated memory is still 470.8 MB. Free memory was 275.8 MB in the beginning and 273.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: 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: 25]: Loop Invariant Derived loop invariant: 7 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.9s, OverallIterations: 10, TraceHistogramMax: 47, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 225 SDtfs, 570 SDslu, 1424 SDs, 0 SdLazy, 2184 SolverSat, 648 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1902 GetRequests, 1687 SyntacticMatches, 23 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=9, 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, 10 MinimizatonAttempts, 51 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 227 PreInvPairs, 322 NumberOfFragments, 101 HoareAnnotationTreeSize, 227 FomulaSimplifications, 353 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 5 FomulaSimplificationsInter, 1943 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 2585 NumberOfCodeBlocks, 2441 NumberOfCodeBlocksAsserted, 93 NumberOfCheckSat, 2567 ConstructedInterpolants, 0 QuantifiedInterpolants, 1421533 SizeOfPredicates, 35 NumberOfNonLiveVariables, 2709 ConjunctsInSsa, 235 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 28919/37204 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...