/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/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:21:29,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:21:29,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:21:29,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:21:29,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:21:29,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:21:29,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:21:29,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:21:29,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:21:29,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:21:29,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:21:29,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:21:29,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:21:29,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:21:29,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:21:29,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:21:29,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:21:29,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:21:29,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:21:29,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:21:29,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:21:29,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:21:29,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:21:29,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:21:29,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:21:29,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:21:29,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:21:29,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:21:29,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:21:29,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:21:29,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:21:29,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:21:29,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:21:29,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:21:29,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:21:29,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:21:29,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:21:29,469 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:21:29,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:21:29,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:21:29,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:21:29,475 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:21:29,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:21:29,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:21:29,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:21:29,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:21:29,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:21:29,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:21:29,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:21:29,478 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:21:29,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:21:29,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:21:29,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:21:29,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:21:29,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:21:29,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:21:29,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:21:29,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:21:29,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:21:29,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:21:29,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:21:29,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:21:29,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:21:29,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:21:29,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:21:29,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:21:29,933 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:21:29,934 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:21:29,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci01-1.c [2020-12-23 09:21:30,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e94b304a/93b06bf543ab4c48804f1e98211b4286/FLAG8fd5e8d78 [2020-12-23 09:21:30,756 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:21:30,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci01-1.c [2020-12-23 09:21:30,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e94b304a/93b06bf543ab4c48804f1e98211b4286/FLAG8fd5e8d78 [2020-12-23 09:21:31,104 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e94b304a/93b06bf543ab4c48804f1e98211b4286 [2020-12-23 09:21:31,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:21:31,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:21:31,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:21:31,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:21:31,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:21:31,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:21:31" (1/1) ... [2020-12-23 09:21:31,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@629b2f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31, skipping insertion in model container [2020-12-23 09:21:31,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:21:31" (1/1) ... [2020-12-23 09:21:31,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:21:31,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:21:31,324 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/Fibonacci01-1.c[804,817] [2020-12-23 09:21:31,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:21:31,340 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:21:31,359 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/Fibonacci01-1.c[804,817] [2020-12-23 09:21:31,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:21:31,378 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:21:31,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31 WrapperNode [2020-12-23 09:21:31,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:21:31,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:21:31,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:21:31,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:21:31,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31" (1/1) ... [2020-12-23 09:21:31,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31" (1/1) ... [2020-12-23 09:21:31,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:21:31,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:21:31,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:21:31,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:21:31,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31" (1/1) ... [2020-12-23 09:21:31,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31" (1/1) ... [2020-12-23 09:21:31,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31" (1/1) ... [2020-12-23 09:21:31,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31" (1/1) ... [2020-12-23 09:21:31,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31" (1/1) ... [2020-12-23 09:21:31,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31" (1/1) ... [2020-12-23 09:21:31,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31" (1/1) ... [2020-12-23 09:21:31,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:21:31,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:21:31,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:21:31,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:21:31,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:21:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-12-23 09:21:31,560 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-12-23 09:21:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:21:31,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:21:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:21:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:21:31,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:21:31,868 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:21:31,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:21:31 BoogieIcfgContainer [2020-12-23 09:21:31,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:21:31,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:21:31,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:21:31,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:21:31,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:21:31" (1/3) ... [2020-12-23 09:21:31,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598dfbda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:21:31, skipping insertion in model container [2020-12-23 09:21:31,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:31" (2/3) ... [2020-12-23 09:21:31,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598dfbda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:21:31, skipping insertion in model container [2020-12-23 09:21:31,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:21:31" (3/3) ... [2020-12-23 09:21:31,880 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-12-23 09:21:31,888 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:21:31,893 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:21:31,973 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:21:32,003 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:21:32,003 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:21:32,003 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:21:32,004 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:21:32,004 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:21:32,004 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:21:32,004 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:21:32,004 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:21:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 09:21:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 09:21:32,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:32,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:32,034 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:32,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:32,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1939714822, now seen corresponding path program 1 times [2020-12-23 09:21:32,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:32,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892897312] [2020-12-23 09:21:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:32,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:21:32,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892897312] [2020-12-23 09:21:32,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:21:32,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:21:32,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652690704] [2020-12-23 09:21:32,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:21:32,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:32,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:21:32,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:21:32,466 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2020-12-23 09:21:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:32,726 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-12-23 09:21:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:21:32,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 09:21:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:32,740 INFO L225 Difference]: With dead ends: 32 [2020-12-23 09:21:32,740 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 09:21:32,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:21:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 09:21:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 09:21:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 09:21:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-23 09:21:32,799 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-12-23 09:21:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:32,799 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-23 09:21:32,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:21:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-23 09:21:32,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 09:21:32,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:32,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:32,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:21:32,803 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash 692912656, now seen corresponding path program 1 times [2020-12-23 09:21:32,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:32,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038408198] [2020-12-23 09:21:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:32,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:21:32,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038408198] [2020-12-23 09:21:32,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:21:33,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:21:33,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327624249] [2020-12-23 09:21:33,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:21:33,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:33,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:21:33,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:21:33,003 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2020-12-23 09:21:33,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:33,084 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-12-23 09:21:33,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:21:33,085 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 09:21:33,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:33,087 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:21:33,087 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 09:21:33,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:21:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 09:21:33,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-12-23 09:21:33,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 09:21:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-23 09:21:33,096 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-12-23 09:21:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:33,096 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-23 09:21:33,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:21:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-23 09:21:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 09:21:33,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:33,098 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 09:21:33,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:21:33,099 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:33,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:33,099 INFO L82 PathProgramCache]: Analyzing trace with hash 453332055, now seen corresponding path program 1 times [2020-12-23 09:21:33,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:33,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231328003] [2020-12-23 09:21:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:33,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:33,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:33,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-23 09:21:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:33,252 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 09:21:33,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231328003] [2020-12-23 09:21:33,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047844546] [2020-12-23 09:21:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:33,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 09:21:33,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:33,815 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 09:21:33,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:33,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 14 [2020-12-23 09:21:33,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439805632] [2020-12-23 09:21:33,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:21:33,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:21:33,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:21:33,831 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 14 states. [2020-12-23 09:21:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:34,004 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2020-12-23 09:21:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:21:34,005 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-12-23 09:21:34,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:34,006 INFO L225 Difference]: With dead ends: 36 [2020-12-23 09:21:34,006 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 09:21:34,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:21:34,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 09:21:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 09:21:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 09:21:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-23 09:21:34,015 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 24 [2020-12-23 09:21:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:34,016 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-23 09:21:34,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:21:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-23 09:21:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 09:21:34,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:34,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:34,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 09:21:34,233 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1064754479, now seen corresponding path program 1 times [2020-12-23 09:21:34,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:34,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359959032] [2020-12-23 09:21:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:34,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:34,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:34,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:21:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 09:21:34,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359959032] [2020-12-23 09:21:34,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520112004] [2020-12-23 09:21:34,449 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 09:21:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:34,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 09:21:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:34,669 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 09:21:34,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:34,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-23 09:21:34,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59611926] [2020-12-23 09:21:34,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:21:34,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:34,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:21:34,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:21:34,672 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 17 states. [2020-12-23 09:21:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:34,898 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2020-12-23 09:21:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:21:34,899 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-12-23 09:21:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:34,901 INFO L225 Difference]: With dead ends: 31 [2020-12-23 09:21:34,902 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 09:21:34,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:21:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 09:21:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-23 09:21:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 09:21:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2020-12-23 09:21:34,912 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 25 [2020-12-23 09:21:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:34,912 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2020-12-23 09:21:34,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:21:34,912 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2020-12-23 09:21:34,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 09:21:34,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:34,915 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:35,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:35,130 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:35,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:35,131 INFO L82 PathProgramCache]: Analyzing trace with hash 484916750, now seen corresponding path program 2 times [2020-12-23 09:21:35,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:35,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35695968] [2020-12-23 09:21:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:21:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:21:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,356 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 09:21:35,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35695968] [2020-12-23 09:21:35,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547479726] [2020-12-23 09:21:35,357 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 09:21:35,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:21:35,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:35,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:21:35,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 09:21:35,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:35,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-12-23 09:21:35,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830933717] [2020-12-23 09:21:35,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:21:35,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:35,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:21:35,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:21:35,513 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 11 states. [2020-12-23 09:21:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:35,653 INFO L93 Difference]: Finished difference Result 53 states and 77 transitions. [2020-12-23 09:21:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 09:21:35,653 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-12-23 09:21:35,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:35,659 INFO L225 Difference]: With dead ends: 53 [2020-12-23 09:21:35,663 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 09:21:35,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:21:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 09:21:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-12-23 09:21:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 09:21:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-12-23 09:21:35,691 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 38 [2020-12-23 09:21:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:35,692 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-12-23 09:21:35,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:21:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-12-23 09:21:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 09:21:35,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:35,702 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:35,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:35,923 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:35,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:35,924 INFO L82 PathProgramCache]: Analyzing trace with hash 837439950, now seen corresponding path program 3 times [2020-12-23 09:21:35,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:35,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253011099] [2020-12-23 09:21:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:36,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:36,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:36,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:21:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:36,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:21:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 09:21:36,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253011099] [2020-12-23 09:21:36,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628086584] [2020-12-23 09:21:36,171 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 09:21:36,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 09:21:36,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:36,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 09:21:36,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 09:21:36,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:36,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2020-12-23 09:21:36,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704114840] [2020-12-23 09:21:36,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 09:21:36,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:36,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 09:21:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:21:36,562 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 21 states. [2020-12-23 09:21:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:37,010 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2020-12-23 09:21:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 09:21:37,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-12-23 09:21:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:37,011 INFO L225 Difference]: With dead ends: 42 [2020-12-23 09:21:37,011 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 09:21:37,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2020-12-23 09:21:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 09:21:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 09:21:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 09:21:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 09:21:37,014 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-12-23 09:21:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:37,014 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 09:21:37,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 09:21:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 09:21:37,015 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 09:21:37,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:37,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 09:21:37,368 INFO L189 CegarLoopUtils]: For program point fibonacciFINAL(lines 16 24) no Hoare annotation was computed. [2020-12-23 09:21:37,368 INFO L192 CegarLoopUtils]: At program point fibonacciENTRY(lines 16 24) the Hoare annotation is: true [2020-12-23 09:21:37,368 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (< 1 fibonacci_~n)) [2020-12-23 09:21:37,369 INFO L189 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-12-23 09:21:37,369 INFO L185 CegarLoopUtils]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 2)) (<= 3 fibonacci_~n) .cse0) (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 1)) .cse0 (< 1 fibonacci_~n)))) [2020-12-23 09:21:37,369 INFO L189 CegarLoopUtils]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-12-23 09:21:37,369 INFO L189 CegarLoopUtils]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-12-23 09:21:37,369 INFO L189 CegarLoopUtils]: For program point fibonacciEXIT(lines 16 24) no Hoare annotation was computed. [2020-12-23 09:21:37,369 INFO L189 CegarLoopUtils]: For program point L17(lines 17 23) no Hoare annotation was computed. [2020-12-23 09:21:37,369 INFO L189 CegarLoopUtils]: For program point L33(lines 33 37) no Hoare annotation was computed. [2020-12-23 09:21:37,369 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 09:21:37,370 INFO L192 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: true [2020-12-23 09:21:37,370 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 09:21:37,370 INFO L189 CegarLoopUtils]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-12-23 09:21:37,370 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 09:21:37,370 INFO L189 CegarLoopUtils]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-12-23 09:21:37,370 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 09:21:37,370 INFO L192 CegarLoopUtils]: At program point L27(lines 27 38) the Hoare annotation is: true [2020-12-23 09:21:37,371 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 36) no Hoare annotation was computed. [2020-12-23 09:21:37,371 INFO L189 CegarLoopUtils]: For program point L36(line 36) no Hoare annotation was computed. [2020-12-23 09:21:37,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:21:37 BoogieIcfgContainer [2020-12-23 09:21:37,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:21:37,382 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:21:37,382 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:21:37,383 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:21:37,383 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:21:31" (3/4) ... [2020-12-23 09:21:37,387 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 09:21:37,394 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2020-12-23 09:21:37,399 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 09:21:37,399 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 09:21:37,399 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:21:37,400 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:21:37,442 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive/Fibonacci01-1.c-witness.graphml [2020-12-23 09:21:37,442 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:21:37,445 INFO L168 Benchmark]: Toolchain (without parser) took 6329.23 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 131.8 MB in the beginning and 156.3 MB in the end (delta: -24.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:37,445 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 156.2 MB. Free memory is still 129.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:21:37,446 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.51 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 122.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:37,447 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.98 ms. Allocated memory is still 156.2 MB. Free memory was 122.2 MB in the beginning and 120.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:37,447 INFO L168 Benchmark]: Boogie Preprocessor took 23.68 ms. Allocated memory is still 156.2 MB. Free memory was 120.9 MB in the beginning and 120.0 MB in the end (delta: 909.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:37,448 INFO L168 Benchmark]: RCFGBuilder took 425.27 ms. Allocated memory is still 156.2 MB. Free memory was 120.0 MB in the beginning and 107.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:37,449 INFO L168 Benchmark]: TraceAbstraction took 5509.51 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 107.5 MB in the beginning and 158.4 MB in the end (delta: -50.9 MB). Peak memory consumption was 76.6 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:37,450 INFO L168 Benchmark]: Witness Printer took 60.29 ms. Allocated memory is still 187.7 MB. Free memory was 158.4 MB in the beginning and 156.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:37,453 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 129.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 259.51 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 122.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.98 ms. Allocated memory is still 156.2 MB. Free memory was 122.2 MB in the beginning and 120.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.68 ms. Allocated memory is still 156.2 MB. Free memory was 120.9 MB in the beginning and 120.0 MB in the end (delta: 909.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 425.27 ms. Allocated memory is still 156.2 MB. Free memory was 120.0 MB in the beginning and 107.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5509.51 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 107.5 MB in the beginning and 158.4 MB in the end (delta: -50.9 MB). Peak memory consumption was 76.6 MB. Max. memory is 8.0 GB. * Witness Printer took 60.29 ms. Allocated memory is still 187.7 MB. Free memory was 158.4 MB in the beginning and 156.3 MB in the end (delta: 2.1 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: 36]: 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: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 87 SDslu, 321 SDs, 0 SdLazy, 669 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 232 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 32 PreInvPairs, 49 NumberOfFragments, 35 HoareAnnotationTreeSize, 32 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 102 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 275 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 265 ConstructedInterpolants, 0 QuantifiedInterpolants, 23358 SizeOfPredicates, 16 NumberOfNonLiveVariables, 386 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 164/244 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...