/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:25:50,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:25:50,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:25:50,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:25:50,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:25:50,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:25:50,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:25:50,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:25:50,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:25:50,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:25:50,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:25:50,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:25:50,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:25:50,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:25:50,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:25:50,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:25:50,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:25:50,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:25:50,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:25:50,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:25:50,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:25:50,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:25:50,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:25:50,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:25:50,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:25:50,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:25:50,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:25:50,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:25:50,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:25:50,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:25:50,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:25:50,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:25:50,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:25:50,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:25:50,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:25:50,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:25:50,656 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 09:25:50,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:25:50,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:25:50,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:25:50,707 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:25:50,707 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:25:50,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:25:50,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:25:50,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:25:50,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:25:50,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:25:50,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:25:50,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:25:50,710 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:25:50,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:25:50,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:25:50,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:25:50,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:25:50,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:25:50,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:25:50,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:25:50,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:25:50,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:25:50,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:25:50,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:25:50,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:25:50,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:25:51,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:25:51,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:25:51,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:25:51,208 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:25:51,209 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:25:51,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-12-23 09:25:51,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a424846d/215a562da1164f4faea75ea340fe2d54/FLAG7cafa725d [2020-12-23 09:25:52,056 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:25:52,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-12-23 09:25:52,065 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a424846d/215a562da1164f4faea75ea340fe2d54/FLAG7cafa725d [2020-12-23 09:25:52,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a424846d/215a562da1164f4faea75ea340fe2d54 [2020-12-23 09:25:52,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:25:52,448 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:25:52,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:25:52,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:25:52,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:25:52,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:25:52" (1/1) ... [2020-12-23 09:25:52,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df19596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52, skipping insertion in model container [2020-12-23 09:25:52,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:25:52" (1/1) ... [2020-12-23 09:25:52,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:25:52,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:25:52,715 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c[946,959] [2020-12-23 09:25:52,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:25:52,740 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:25:52,758 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c[946,959] [2020-12-23 09:25:52,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:25:52,778 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:25:52,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52 WrapperNode [2020-12-23 09:25:52,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:25:52,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:25:52,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:25:52,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:25:52,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52" (1/1) ... [2020-12-23 09:25:52,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52" (1/1) ... [2020-12-23 09:25:52,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:25:52,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:25:52,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:25:52,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:25:52,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52" (1/1) ... [2020-12-23 09:25:52,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52" (1/1) ... [2020-12-23 09:25:52,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52" (1/1) ... [2020-12-23 09:25:52,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52" (1/1) ... [2020-12-23 09:25:52,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52" (1/1) ... [2020-12-23 09:25:52,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52" (1/1) ... [2020-12-23 09:25:52,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52" (1/1) ... [2020-12-23 09:25:52,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:25:52,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:25:52,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:25:52,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:25:52,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52" (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 09:25:52,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:25:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-12-23 09:25:52,950 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-12-23 09:25:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:25:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-12-23 09:25:52,951 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-12-23 09:25:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:25:52,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:25:53,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:25:53,221 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:25:53,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:25:53 BoogieIcfgContainer [2020-12-23 09:25:53,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:25:53,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:25:53,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:25:53,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:25:53,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:25:52" (1/3) ... [2020-12-23 09:25:53,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222f81e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:25:53, skipping insertion in model container [2020-12-23 09:25:53,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:52" (2/3) ... [2020-12-23 09:25:53,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222f81e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:25:53, skipping insertion in model container [2020-12-23 09:25:53,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:25:53" (3/3) ... [2020-12-23 09:25:53,298 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-12-23 09:25:53,340 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:25:53,354 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:25:53,389 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:25:53,453 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:25:53,453 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:25:53,453 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:25:53,454 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:25:53,454 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:25:53,454 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:25:53,454 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:25:53,454 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:25:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-23 09:25:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:25:53,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:53,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:53,514 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:53,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2020-12-23 09:25:53,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:53,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341862497] [2020-12-23 09:25:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:53,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:53,957 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 09:25:53,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341862497] [2020-12-23 09:25:53,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:25:53,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:25:53,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400456777] [2020-12-23 09:25:53,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:25:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:25:53,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:25:53,988 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-12-23 09:25:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:54,052 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-12-23 09:25:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:25:54,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:25:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:54,074 INFO L225 Difference]: With dead ends: 43 [2020-12-23 09:25:54,075 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 09:25:54,080 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 [2020-12-23 09:25:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 09:25:54,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 09:25:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:25:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-23 09:25:54,143 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-12-23 09:25:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:54,144 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-23 09:25:54,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:25:54,145 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-23 09:25:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 09:25:54,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:54,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:54,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:25:54,150 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:54,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2020-12-23 09:25:54,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:54,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134999495] [2020-12-23 09:25:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,255 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 09:25:54,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134999495] [2020-12-23 09:25:54,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:25:54,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:25:54,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397795215] [2020-12-23 09:25:54,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:25:54,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:54,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:25:54,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:25:54,260 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-12-23 09:25:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:54,289 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-12-23 09:25:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:25:54,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 09:25:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:54,291 INFO L225 Difference]: With dead ends: 33 [2020-12-23 09:25:54,291 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 09:25:54,293 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 [2020-12-23 09:25:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 09:25:54,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-12-23 09:25:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:25:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-23 09:25:54,301 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-12-23 09:25:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:54,302 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-23 09:25:54,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:25:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-23 09:25:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 09:25:54,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:54,304 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:54,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:25:54,305 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:54,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2020-12-23 09:25:54,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:54,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030085576] [2020-12-23 09:25:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-23 09:25:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 09:25:54,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030085576] [2020-12-23 09:25:54,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59267274] [2020-12-23 09:25:54,463 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 09:25:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:25:54,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 09:25:54,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:54,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-12-23 09:25:54,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471849266] [2020-12-23 09:25:54,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:25:54,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:54,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:25:54,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:25:54,751 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-12-23 09:25:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:54,989 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-12-23 09:25:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:25:54,990 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-23 09:25:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:54,992 INFO L225 Difference]: With dead ends: 55 [2020-12-23 09:25:54,992 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 09:25:54,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:25:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 09:25:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-23 09:25:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 09:25:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-23 09:25:55,003 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-12-23 09:25:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:55,004 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-23 09:25:55,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:25:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-23 09:25:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 09:25:55,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:55,006 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] [2020-12-23 09:25:55,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 09:25:55,221 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:55,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2020-12-23 09:25:55,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:55,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800562669] [2020-12-23 09:25:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 09:25:55,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800562669] [2020-12-23 09:25:55,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841635230] [2020-12-23 09:25:55,357 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 09:25:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:25:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 09:25:55,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:55,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-12-23 09:25:55,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465445382] [2020-12-23 09:25:55,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:25:55,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:55,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:25:55,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:25:55,490 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 10 states. [2020-12-23 09:25:55,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:55,667 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-12-23 09:25:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 09:25:55,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-12-23 09:25:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:55,671 INFO L225 Difference]: With dead ends: 51 [2020-12-23 09:25:55,672 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 09:25:55,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:25:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 09:25:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-12-23 09:25:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 09:25:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-12-23 09:25:55,686 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-12-23 09:25:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:55,687 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-12-23 09:25:55,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:25:55,687 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-12-23 09:25:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 09:25:55,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:55,690 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:55,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:55,904 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:55,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2020-12-23 09:25:55,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:55,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985375239] [2020-12-23 09:25:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:55,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-23 09:25:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-12-23 09:25:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 09:25:56,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985375239] [2020-12-23 09:25:56,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65820661] [2020-12-23 09:25:56,091 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 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 09:25:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:25:56,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 09:25:56,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:56,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-12-23 09:25:56,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689074091] [2020-12-23 09:25:56,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:25:56,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:56,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:25:56,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:25:56,272 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-12-23 09:25:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:56,610 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-12-23 09:25:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 09:25:56,611 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-23 09:25:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:56,614 INFO L225 Difference]: With dead ends: 105 [2020-12-23 09:25:56,614 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 09:25:56,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:25:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 09:25:56,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 09:25:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 09:25:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-12-23 09:25:56,633 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-12-23 09:25:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:56,633 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-12-23 09:25:56,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:25:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-12-23 09:25:56,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 09:25:56,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:56,636 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:56,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:56,851 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:56,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2020-12-23 09:25:56,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:56,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331358439] [2020-12-23 09:25:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 09:25:56,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331358439] [2020-12-23 09:25:56,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841285113] [2020-12-23 09:25:56,977 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 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 09:25:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:25:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 09:25:57,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:57,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 09:25:57,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455977678] [2020-12-23 09:25:57,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:25:57,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:57,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:25:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:25:57,163 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 14 states. [2020-12-23 09:25:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:57,564 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-12-23 09:25:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:25:57,565 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-12-23 09:25:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:57,569 INFO L225 Difference]: With dead ends: 177 [2020-12-23 09:25:57,569 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 09:25:57,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:25:57,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 09:25:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-12-23 09:25:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 09:25:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-12-23 09:25:57,600 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-12-23 09:25:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:57,600 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-12-23 09:25:57,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:25:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-12-23 09:25:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 09:25:57,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:57,606 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:57,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:57,814 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:57,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:57,816 INFO L82 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2020-12-23 09:25:57,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:57,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898450579] [2020-12-23 09:25:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-23 09:25:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 09:25:57,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898450579] [2020-12-23 09:25:57,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879399967] [2020-12-23 09:25:57,985 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:58,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 09:25:58,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 09:25:58,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:58,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 09:25:58,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492530157] [2020-12-23 09:25:58,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 09:25:58,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:58,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 09:25:58,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:25:58,207 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 15 states. [2020-12-23 09:25:58,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:58,737 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2020-12-23 09:25:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 09:25:58,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-12-23 09:25:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:58,742 INFO L225 Difference]: With dead ends: 255 [2020-12-23 09:25:58,742 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 09:25:58,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-12-23 09:25:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 09:25:58,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2020-12-23 09:25:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 09:25:58,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2020-12-23 09:25:58,775 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2020-12-23 09:25:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:58,775 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2020-12-23 09:25:58,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 09:25:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2020-12-23 09:25:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 09:25:58,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:58,782 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:58,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 09:25:58,996 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:58,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1770426885, now seen corresponding path program 1 times [2020-12-23 09:25:58,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:58,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591467347] [2020-12-23 09:25:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:25:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-12-23 09:25:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:25:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-23 09:25:59,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591467347] [2020-12-23 09:25:59,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779230388] [2020-12-23 09:25:59,410 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:59,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:25:59,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-23 09:25:59,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:59,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2020-12-23 09:25:59,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408445406] [2020-12-23 09:25:59,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 09:25:59,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:59,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 09:25:59,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-12-23 09:25:59,669 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand 16 states. [2020-12-23 09:26:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:00,154 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2020-12-23 09:26:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 09:26:00,155 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2020-12-23 09:26:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:00,158 INFO L225 Difference]: With dead ends: 241 [2020-12-23 09:26:00,158 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 09:26:00,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-12-23 09:26:00,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 09:26:00,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2020-12-23 09:26:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 09:26:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2020-12-23 09:26:00,182 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 107 [2020-12-23 09:26:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:00,183 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2020-12-23 09:26:00,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 09:26:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2020-12-23 09:26:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 09:26:00,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:00,188 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:00,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:00,402 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash -482868633, now seen corresponding path program 2 times [2020-12-23 09:26:00,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:00,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564496714] [2020-12-23 09:26:00,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-12-23 09:26:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 61 proven. 93 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-23 09:26:00,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564496714] [2020-12-23 09:26:00,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742350981] [2020-12-23 09:26:00,833 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:00,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:00,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:00,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 09:26:00,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 76 proven. 59 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-12-23 09:26:01,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:01,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2020-12-23 09:26:01,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216124128] [2020-12-23 09:26:01,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 09:26:01,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:01,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 09:26:01,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:26:01,166 INFO L87 Difference]: Start difference. First operand 98 states and 151 transitions. Second operand 21 states. [2020-12-23 09:26:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:01,872 INFO L93 Difference]: Finished difference Result 250 states and 477 transitions. [2020-12-23 09:26:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 09:26:01,873 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2020-12-23 09:26:01,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:01,876 INFO L225 Difference]: With dead ends: 250 [2020-12-23 09:26:01,876 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 09:26:01,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2020-12-23 09:26:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 09:26:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2020-12-23 09:26:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 09:26:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 151 transitions. [2020-12-23 09:26:01,896 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 151 transitions. Word has length 106 [2020-12-23 09:26:01,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:01,897 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 151 transitions. [2020-12-23 09:26:01,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 09:26:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 151 transitions. [2020-12-23 09:26:01,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 09:26:01,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:01,899 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:02,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:02,114 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:02,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:02,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1154581566, now seen corresponding path program 1 times [2020-12-23 09:26:02,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:02,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594613296] [2020-12-23 09:26:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 108 proven. 97 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-23 09:26:02,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594613296] [2020-12-23 09:26:02,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001447679] [2020-12-23 09:26:02,620 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 09:26:02,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 112 proven. 24 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-23 09:26:02,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:02,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 25 [2020-12-23 09:26:02,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262136537] [2020-12-23 09:26:02,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 09:26:02,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:02,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 09:26:02,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-12-23 09:26:02,924 INFO L87 Difference]: Start difference. First operand 108 states and 151 transitions. Second operand 25 states. [2020-12-23 09:26:03,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:03,634 INFO L93 Difference]: Finished difference Result 224 states and 341 transitions. [2020-12-23 09:26:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 09:26:03,634 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 119 [2020-12-23 09:26:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:03,637 INFO L225 Difference]: With dead ends: 224 [2020-12-23 09:26:03,637 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 09:26:03,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 09:26:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 09:26:03,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2020-12-23 09:26:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 09:26:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-12-23 09:26:03,653 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 119 [2020-12-23 09:26:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:03,653 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-12-23 09:26:03,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 09:26:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-12-23 09:26:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 09:26:03,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:03,655 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:03,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 09:26:03,870 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:03,870 INFO L82 PathProgramCache]: Analyzing trace with hash 882144864, now seen corresponding path program 2 times [2020-12-23 09:26:03,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:03,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829749163] [2020-12-23 09:26:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:03,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:26:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:26:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-23 09:26:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:26:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:26:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 79 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-23 09:26:04,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829749163] [2020-12-23 09:26:04,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015300409] [2020-12-23 09:26:04,128 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:04,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:04,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:04,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:26:04,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-23 09:26:04,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:04,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2020-12-23 09:26:04,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045462590] [2020-12-23 09:26:04,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 09:26:04,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:04,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 09:26:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-12-23 09:26:04,337 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 16 states. [2020-12-23 09:26:04,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:04,659 INFO L93 Difference]: Finished difference Result 177 states and 229 transitions. [2020-12-23 09:26:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:26:04,660 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2020-12-23 09:26:04,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:04,662 INFO L225 Difference]: With dead ends: 177 [2020-12-23 09:26:04,662 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 09:26:04,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:26:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 09:26:04,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-12-23 09:26:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 09:26:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-12-23 09:26:04,672 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 92 [2020-12-23 09:26:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:04,673 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-12-23 09:26:04,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 09:26:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-12-23 09:26:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 09:26:04,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:04,675 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:04,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:04,889 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash 2118534433, now seen corresponding path program 3 times [2020-12-23 09:26:04,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:04,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088805010] [2020-12-23 09:26:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 09:26:04,910 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 09:26:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 09:26:04,928 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 09:26:04,959 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 09:26:04,959 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 09:26:04,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 09:26:05,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:26:05 BoogieIcfgContainer [2020-12-23 09:26:05,052 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:26:05,053 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:26:05,053 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:26:05,053 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:26:05,054 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:25:53" (3/4) ... [2020-12-23 09:26:05,056 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 09:26:05,170 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/fibo_2calls_5-2.c-witness.graphml [2020-12-23 09:26:05,171 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:26:05,173 INFO L168 Benchmark]: Toolchain (without parser) took 12723.94 ms. Allocated memory was 160.4 MB in the beginning and 280.0 MB in the end (delta: 119.5 MB). Free memory was 136.0 MB in the beginning and 206.1 MB in the end (delta: -70.1 MB). Peak memory consumption was 50.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:05,173 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory is still 133.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:26:05,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.19 ms. Allocated memory is still 160.4 MB. Free memory was 135.9 MB in the beginning and 126.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:05,174 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.03 ms. Allocated memory is still 160.4 MB. Free memory was 126.4 MB in the beginning and 125.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:05,175 INFO L168 Benchmark]: Boogie Preprocessor took 24.20 ms. Allocated memory is still 160.4 MB. Free memory was 125.0 MB in the beginning and 124.1 MB in the end (delta: 952.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:05,175 INFO L168 Benchmark]: RCFGBuilder took 415.64 ms. Allocated memory is still 160.4 MB. Free memory was 124.0 MB in the beginning and 143.7 MB in the end (delta: -19.7 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:05,176 INFO L168 Benchmark]: TraceAbstraction took 11786.36 ms. Allocated memory was 160.4 MB in the beginning and 280.0 MB in the end (delta: 119.5 MB). Free memory was 143.7 MB in the beginning and 211.8 MB in the end (delta: -68.2 MB). Peak memory consumption was 50.9 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:05,176 INFO L168 Benchmark]: Witness Printer took 117.64 ms. Allocated memory is still 280.0 MB. Free memory was 211.3 MB in the beginning and 206.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:05,179 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory is still 133.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 325.19 ms. Allocated memory is still 160.4 MB. Free memory was 135.9 MB in the beginning and 126.4 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 41.03 ms. Allocated memory is still 160.4 MB. Free memory was 126.4 MB in the beginning and 125.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.20 ms. Allocated memory is still 160.4 MB. Free memory was 125.0 MB in the beginning and 124.1 MB in the end (delta: 952.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 415.64 ms. Allocated memory is still 160.4 MB. Free memory was 124.0 MB in the beginning and 143.7 MB in the end (delta: -19.7 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11786.36 ms. Allocated memory was 160.4 MB in the beginning and 280.0 MB in the end (delta: 119.5 MB). Free memory was 143.7 MB in the beginning and 211.8 MB in the end (delta: -68.2 MB). Peak memory consumption was 50.9 MB. Max. memory is 8.0 GB. * Witness Printer took 117.64 ms. Allocated memory is still 280.0 MB. Free memory was 211.3 MB in the beginning and 206.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 5; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 5 [L41] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.5s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 305 SDtfs, 572 SDslu, 1857 SDs, 0 SdLazy, 2958 SolverSat, 593 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 955 GetRequests, 758 SyntacticMatches, 2 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 139 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 1317 NumberOfCodeBlocks, 1317 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1191 ConstructedInterpolants, 0 QuantifiedInterpolants, 182183 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1589 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 1831/2342 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...