/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/id2_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:03:03,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:03:03,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:03:03,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:03:03,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:03:03,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:03:03,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:03:03,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:03:03,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:03:03,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:03:03,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:03:03,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:03:03,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:03:03,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:03:03,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:03:03,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:03:03,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:03:03,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:03:03,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:03:03,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:03:03,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:03:03,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:03:03,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:03:03,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:03:03,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:03:03,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:03:03,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:03:03,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:03:03,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:03:03,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:03:03,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:03:03,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:03:03,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:03:03,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:03:03,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:03:03,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:03:03,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:03:03,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:03:03,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:03:03,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:03:03,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:03:03,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:03:03,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:03:03,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:03:03,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:03:03,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:03:03,520 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:03:03,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:03:03,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:03:03,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:03:03,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:03:03,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:03:03,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:03:03,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:03:03,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:03:03,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:03:03,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:03:03,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:03:03,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:03:03,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:03:03,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:03:03,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:03:03,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:03:03,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:03:03,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:03:03,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:03:03,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:03:03,525 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:03:03,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:03:04,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:03:04,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:03:04,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:03:04,042 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:03:04,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id2_b2_o3.c [2020-12-22 07:03:04,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/239abf775/13f829d1c3514c72b073c156c84df99a/FLAG153374906 [2020-12-22 07:03:04,705 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:03:04,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_b2_o3.c [2020-12-22 07:03:04,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/239abf775/13f829d1c3514c72b073c156c84df99a/FLAG153374906 [2020-12-22 07:03:05,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/239abf775/13f829d1c3514c72b073c156c84df99a [2020-12-22 07:03:05,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:03:05,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:03:05,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:03:05,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:03:05,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:03:05,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:03:05" (1/1) ... [2020-12-22 07:03:05,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9c9253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05, skipping insertion in model container [2020-12-22 07:03:05,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:03:05" (1/1) ... [2020-12-22 07:03:05,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:03:05,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:03:05,297 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_b2_o3.c[771,784] [2020-12-22 07:03:05,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:03:05,313 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:03:05,334 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_b2_o3.c[771,784] [2020-12-22 07:03:05,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:03:05,352 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:03:05,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05 WrapperNode [2020-12-22 07:03:05,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:03:05,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:03:05,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:03:05,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:03:05,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05" (1/1) ... [2020-12-22 07:03:05,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05" (1/1) ... [2020-12-22 07:03:05,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:03:05,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:03:05,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:03:05,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:03:05,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05" (1/1) ... [2020-12-22 07:03:05,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05" (1/1) ... [2020-12-22 07:03:05,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05" (1/1) ... [2020-12-22 07:03:05,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05" (1/1) ... [2020-12-22 07:03:05,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05" (1/1) ... [2020-12-22 07:03:05,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05" (1/1) ... [2020-12-22 07:03:05,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05" (1/1) ... [2020-12-22 07:03:05,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:03:05,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:03:05,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:03:05,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:03:05,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 07:03:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:03:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:03:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-12-22 07:03:05,596 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-12-22 07:03:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:03:05,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:03:05,597 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-22 07:03:05,597 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-22 07:03:05,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:03:05,985 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 07:03:05,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:03:05 BoogieIcfgContainer [2020-12-22 07:03:05,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:03:05,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:03:05,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:03:05,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:03:06,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:03:05" (1/3) ... [2020-12-22 07:03:06,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4bd598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:03:06, skipping insertion in model container [2020-12-22 07:03:06,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:03:05" (2/3) ... [2020-12-22 07:03:06,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4bd598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:03:06, skipping insertion in model container [2020-12-22 07:03:06,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:03:05" (3/3) ... [2020-12-22 07:03:06,011 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b2_o3.c [2020-12-22 07:03:06,058 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:03:06,067 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:03:06,119 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:03:06,149 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:03:06,149 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:03:06,149 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:03:06,149 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:03:06,150 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:03:06,150 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:03:06,150 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:03:06,150 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:03:06,171 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-22 07:03:06,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 07:03:06,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:03:06,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:03:06,179 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:03:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:03:06,186 INFO L82 PathProgramCache]: Analyzing trace with hash 794002500, now seen corresponding path program 1 times [2020-12-22 07:03:06,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:03:06,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532707583] [2020-12-22 07:03:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:03:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:06,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:03:06,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532707583] [2020-12-22 07:03:06,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:03:06,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:03:06,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854026650] [2020-12-22 07:03:06,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:03:06,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:03:06,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:03:06,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:03:06,628 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-12-22 07:03:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:03:06,676 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-22 07:03:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:03:06,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 07:03:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:03:06,688 INFO L225 Difference]: With dead ends: 36 [2020-12-22 07:03:06,688 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 07:03:06,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:03:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 07:03:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 07:03:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 07:03:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-22 07:03:06,754 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-12-22 07:03:06,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:03:06,756 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-22 07:03:06,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:03:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-22 07:03:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 07:03:06,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:03:06,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:03:06,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:03:06,763 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:03:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:03:06,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1040166181, now seen corresponding path program 1 times [2020-12-22 07:03:06,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:03:06,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200593543] [2020-12-22 07:03:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:03:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:06,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:06,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:03:06,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200593543] [2020-12-22 07:03:06,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:03:06,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:03:06,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071860130] [2020-12-22 07:03:06,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:03:06,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:03:06,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:03:06,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:03:06,920 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-12-22 07:03:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:03:06,945 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-12-22 07:03:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:03:06,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-22 07:03:06,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:03:06,947 INFO L225 Difference]: With dead ends: 41 [2020-12-22 07:03:06,947 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 07:03:06,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:03:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 07:03:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-12-22 07:03:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 07:03:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-22 07:03:06,957 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-12-22 07:03:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:03:06,958 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-22 07:03:06,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:03:06,958 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-22 07:03:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 07:03:06,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:03:06,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:03:06,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:03:06,960 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:03:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:03:06,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1068795332, now seen corresponding path program 1 times [2020-12-22 07:03:06,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:03:06,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679330091] [2020-12-22 07:03:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:03:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:07,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:07,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:03:07,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679330091] [2020-12-22 07:03:07,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:03:07,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:03:07,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839039040] [2020-12-22 07:03:07,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:03:07,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:03:07,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:03:07,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:03:07,277 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2020-12-22 07:03:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:03:07,346 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-12-22 07:03:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:03:07,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-22 07:03:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:03:07,348 INFO L225 Difference]: With dead ends: 33 [2020-12-22 07:03:07,348 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 07:03:07,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:03:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 07:03:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-12-22 07:03:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 07:03:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-22 07:03:07,357 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-12-22 07:03:07,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:03:07,357 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-22 07:03:07,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:03:07,357 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-22 07:03:07,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 07:03:07,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:03:07,359 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:03:07,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:03:07,360 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:03:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:03:07,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1632008158, now seen corresponding path program 1 times [2020-12-22 07:03:07,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:03:07,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518137578] [2020-12-22 07:03:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:03:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:07,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:07,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:07,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:03:07,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518137578] [2020-12-22 07:03:07,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:03:07,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:03:07,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386878168] [2020-12-22 07:03:07,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:03:07,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:03:07,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:03:07,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:03:07,604 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-12-22 07:03:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:03:07,629 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-12-22 07:03:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:03:07,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-12-22 07:03:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:03:07,631 INFO L225 Difference]: With dead ends: 45 [2020-12-22 07:03:07,632 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 07:03:07,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:03:07,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 07:03:07,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-12-22 07:03:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 07:03:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-22 07:03:07,641 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-12-22 07:03:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:03:07,641 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-22 07:03:07,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:03:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-22 07:03:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 07:03:07,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:03:07,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:03:07,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:03:07,644 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:03:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:03:07,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1435494653, now seen corresponding path program 1 times [2020-12-22 07:03:07,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:03:07,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538356424] [2020-12-22 07:03:07,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:03:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:07,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:07,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:07,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:03:07,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538356424] [2020-12-22 07:03:07,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:03:07,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:03:07,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875946324] [2020-12-22 07:03:07,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:03:07,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:03:07,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:03:07,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:03:07,874 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-12-22 07:03:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:03:07,935 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-12-22 07:03:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:03:07,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-22 07:03:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:03:07,937 INFO L225 Difference]: With dead ends: 49 [2020-12-22 07:03:07,938 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 07:03:07,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:03:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 07:03:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-12-22 07:03:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 07:03:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-22 07:03:07,946 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2020-12-22 07:03:07,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:03:07,947 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-22 07:03:07,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:03:07,947 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-22 07:03:07,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 07:03:07,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:03:07,948 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:03:07,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:03:07,949 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:03:07,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:03:07,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1464123804, now seen corresponding path program 1 times [2020-12-22 07:03:07,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:03:07,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422560627] [2020-12-22 07:03:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:03:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:08,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:08,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:08,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:03:08,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422560627] [2020-12-22 07:03:08,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647038806] [2020-12-22 07:03:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 07:03:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:08,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 07:03:08,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:03:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:03:08,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:03:08,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 07:03:08,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586577123] [2020-12-22 07:03:08,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:03:08,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:03:08,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:03:08,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:03:08,477 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 12 states. [2020-12-22 07:03:08,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:03:08,593 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-12-22 07:03:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 07:03:08,593 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-12-22 07:03:08,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:03:08,594 INFO L225 Difference]: With dead ends: 43 [2020-12-22 07:03:08,595 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 07:03:08,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:03:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 07:03:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-12-22 07:03:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 07:03:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-22 07:03:08,615 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-12-22 07:03:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:03:08,616 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-22 07:03:08,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:03:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-22 07:03:08,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 07:03:08,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:03:08,623 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:03:08,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 07:03:08,838 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:03:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:03:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash 965852917, now seen corresponding path program 1 times [2020-12-22 07:03:08,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:03:08,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308188577] [2020-12-22 07:03:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:03:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:08,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:08,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:08,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:09,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:03:09,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308188577] [2020-12-22 07:03:09,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:03:09,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:03:09,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140601280] [2020-12-22 07:03:09,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:03:09,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:03:09,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:03:09,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:03:09,056 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-12-22 07:03:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:03:09,122 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-12-22 07:03:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:03:09,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-22 07:03:09,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:03:09,127 INFO L225 Difference]: With dead ends: 55 [2020-12-22 07:03:09,127 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 07:03:09,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:03:09,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 07:03:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-12-22 07:03:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 07:03:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-12-22 07:03:09,152 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2020-12-22 07:03:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:03:09,154 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-12-22 07:03:09,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:03:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-12-22 07:03:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 07:03:09,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:03:09,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:03:09,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:03:09,162 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:03:09,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:03:09,162 INFO L82 PathProgramCache]: Analyzing trace with hash 769339412, now seen corresponding path program 1 times [2020-12-22 07:03:09,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:03:09,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201583933] [2020-12-22 07:03:09,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:03:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:09,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:09,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:09,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:09,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:03:09,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201583933] [2020-12-22 07:03:09,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442270918] [2020-12-22 07:03:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 07:03:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:09,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 07:03:09,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:03:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:03:09,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:03:09,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 07:03:09,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991514987] [2020-12-22 07:03:09,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:03:09,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:03:09,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:03:09,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:03:09,646 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-12-22 07:03:09,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:03:09,749 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-12-22 07:03:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 07:03:09,749 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-12-22 07:03:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:03:09,751 INFO L225 Difference]: With dead ends: 61 [2020-12-22 07:03:09,751 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 07:03:09,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:03:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 07:03:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-12-22 07:03:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 07:03:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-22 07:03:09,758 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 31 [2020-12-22 07:03:09,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:03:09,759 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-22 07:03:09,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:03:09,759 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-22 07:03:09,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 07:03:09,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:03:09,760 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:03:09,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:03:09,975 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:03:09,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:03:09,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1609637876, now seen corresponding path program 2 times [2020-12-22 07:03:09,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:03:09,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893455531] [2020-12-22 07:03:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:03:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:10,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:10,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:10,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:10,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:10,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:03:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:03:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:03:10,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893455531] [2020-12-22 07:03:10,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911372072] [2020-12-22 07:03:10,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 07:03:10,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:03:10,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:03:10,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 07:03:10,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:03:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:03:10,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:03:10,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-12-22 07:03:10,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543102128] [2020-12-22 07:03:10,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 07:03:10,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:03:10,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 07:03:10,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-12-22 07:03:10,597 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 18 states. [2020-12-22 07:03:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:03:10,735 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-12-22 07:03:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 07:03:10,736 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-12-22 07:03:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:03:10,736 INFO L225 Difference]: With dead ends: 55 [2020-12-22 07:03:10,736 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 07:03:10,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-12-22 07:03:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 07:03:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 07:03:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 07:03:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 07:03:10,740 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-12-22 07:03:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:03:10,740 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 07:03:10,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 07:03:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 07:03:10,741 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 07:03:10,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:03:10,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 07:03:10,977 INFO L189 CegarLoopUtils]: For program point L17(line 17) no Hoare annotation was computed. [2020-12-22 07:03:10,977 INFO L189 CegarLoopUtils]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-12-22 07:03:10,978 INFO L189 CegarLoopUtils]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2020-12-22 07:03:10,978 INFO L192 CegarLoopUtils]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2020-12-22 07:03:10,978 INFO L189 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2020-12-22 07:03:10,978 INFO L189 CegarLoopUtils]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2020-12-22 07:03:10,978 INFO L192 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: true [2020-12-22 07:03:10,978 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 07:03:10,978 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 07:03:10,979 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 07:03:10,979 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 07:03:10,979 INFO L189 CegarLoopUtils]: For program point L27(line 27) no Hoare annotation was computed. [2020-12-22 07:03:10,979 INFO L189 CegarLoopUtils]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-12-22 07:03:10,979 INFO L192 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2020-12-22 07:03:10,979 INFO L189 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-12-22 07:03:10,980 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-12-22 07:03:10,980 INFO L189 CegarLoopUtils]: For program point L23(lines 23 29) no Hoare annotation was computed. [2020-12-22 07:03:10,980 INFO L189 CegarLoopUtils]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2020-12-22 07:03:10,980 INFO L189 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2020-12-22 07:03:10,980 INFO L192 CegarLoopUtils]: At program point L11(line 11) the Hoare annotation is: true [2020-12-22 07:03:10,980 INFO L189 CegarLoopUtils]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2020-12-22 07:03:10,980 INFO L189 CegarLoopUtils]: For program point L10(line 10) no Hoare annotation was computed. [2020-12-22 07:03:10,980 INFO L189 CegarLoopUtils]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-12-22 07:03:10,980 INFO L192 CegarLoopUtils]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2020-12-22 07:03:10,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:03:10 BoogieIcfgContainer [2020-12-22 07:03:10,986 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 07:03:10,987 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 07:03:10,987 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 07:03:10,987 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 07:03:10,988 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:03:05" (3/4) ... [2020-12-22 07:03:10,992 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 07:03:11,000 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2020-12-22 07:03:11,001 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-12-22 07:03:11,011 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-22 07:03:11,012 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 07:03:11,012 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 07:03:11,012 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 07:03:11,091 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/id2_b2_o3.c-witness.graphml [2020-12-22 07:03:11,092 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 07:03:11,094 INFO L168 Benchmark]: Toolchain (without parser) took 6014.49 ms. Allocated memory was 156.2 MB in the beginning and 206.6 MB in the end (delta: 50.3 MB). Free memory was 132.4 MB in the beginning and 129.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:11,097 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 156.2 MB. Free memory is still 128.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 07:03:11,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.50 ms. Allocated memory is still 156.2 MB. Free memory was 132.3 MB in the beginning and 122.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:11,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 156.2 MB. Free memory was 122.8 MB in the beginning and 121.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:11,100 INFO L168 Benchmark]: Boogie Preprocessor took 41.22 ms. Allocated memory is still 156.2 MB. Free memory was 121.5 MB in the beginning and 120.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:11,100 INFO L168 Benchmark]: RCFGBuilder took 554.24 ms. Allocated memory is still 156.2 MB. Free memory was 120.4 MB in the beginning and 107.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:11,101 INFO L168 Benchmark]: TraceAbstraction took 4996.74 ms. Allocated memory was 156.2 MB in the beginning and 206.6 MB in the end (delta: 50.3 MB). Free memory was 107.5 MB in the beginning and 131.6 MB in the end (delta: -24.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:11,106 INFO L168 Benchmark]: Witness Printer took 104.69 ms. Allocated memory is still 206.6 MB. Free memory was 131.6 MB in the beginning and 129.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:11,113 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 156.2 MB. Free memory is still 128.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.50 ms. Allocated memory is still 156.2 MB. Free memory was 132.3 MB in the beginning and 122.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 156.2 MB. Free memory was 122.8 MB in the beginning and 121.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.22 ms. Allocated memory is still 156.2 MB. Free memory was 121.5 MB in the beginning and 120.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 554.24 ms. Allocated memory is still 156.2 MB. Free memory was 120.4 MB in the beginning and 107.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4996.74 ms. Allocated memory was 156.2 MB in the beginning and 206.6 MB in the end (delta: 50.3 MB). Free memory was 107.5 MB in the beginning and 131.6 MB in the end (delta: -24.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 8.0 GB. * Witness Printer took 104.69 ms. Allocated memory is still 206.6 MB. Free memory was 131.6 MB in the beginning and 129.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 37 SDslu, 1428 SDs, 0 SdLazy, 376 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 234 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=8, 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, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 5 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 309 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 297 ConstructedInterpolants, 0 QuantifiedInterpolants, 27933 SizeOfPredicates, 11 NumberOfNonLiveVariables, 288 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 65/93 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...