/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_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:25:32,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:25:32,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:25:32,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:25:32,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:25:32,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:25:32,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:25:32,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:25:32,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:25:32,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:25:32,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:25:32,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:25:32,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:25:32,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:25:32,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:25:32,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:25:32,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:25:32,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:25:32,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:25:32,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:25:32,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:25:32,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:25:32,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:25:32,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:25:32,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:25:32,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:25:32,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:25:32,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:25:32,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:25:32,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:25:32,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:25:32,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:25:32,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:25:32,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:25:32,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:25:32,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:25:32,346 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 09:25:32,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:25:32,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:25:32,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:25:32,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:25:32,405 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:25:32,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:25:32,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:25:32,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:25:32,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:25:32,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:25:32,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:25:32,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:25:32,408 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:25:32,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:25:32,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:25:32,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:25:32,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:25:32,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:25:32,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:25:32,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:25:32,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:25:32,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:25:32,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:25:32,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:25:32,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:25:32,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:25:32,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:25:32,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:25:32,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:25:32,971 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:25:32,972 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:25:32,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2020-12-23 09:25:33,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b8e024ff3/3528b5c2812044daa4c9496ae1e26ef5/FLAGb91438401 [2020-12-23 09:25:33,757 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:25:33,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2020-12-23 09:25:33,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b8e024ff3/3528b5c2812044daa4c9496ae1e26ef5/FLAGb91438401 [2020-12-23 09:25:34,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b8e024ff3/3528b5c2812044daa4c9496ae1e26ef5 [2020-12-23 09:25:34,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:25:34,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:25:34,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:25:34,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:25:34,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:25:34,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:25:34" (1/1) ... [2020-12-23 09:25:34,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e28e301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34, skipping insertion in model container [2020-12-23 09:25:34,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:25:34" (1/1) ... [2020-12-23 09:25:34,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:25:34,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:25:34,323 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_4-1.c[946,959] [2020-12-23 09:25:34,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:25:34,341 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:25:34,361 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_4-1.c[946,959] [2020-12-23 09:25:34,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:25:34,382 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:25:34,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34 WrapperNode [2020-12-23 09:25:34,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:25:34,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:25:34,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:25:34,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:25:34,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34" (1/1) ... [2020-12-23 09:25:34,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34" (1/1) ... [2020-12-23 09:25:34,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:25:34,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:25:34,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:25:34,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:25:34,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34" (1/1) ... [2020-12-23 09:25:34,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34" (1/1) ... [2020-12-23 09:25:34,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34" (1/1) ... [2020-12-23 09:25:34,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34" (1/1) ... [2020-12-23 09:25:34,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34" (1/1) ... [2020-12-23 09:25:34,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34" (1/1) ... [2020-12-23 09:25:34,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34" (1/1) ... [2020-12-23 09:25:34,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:25:34,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:25:34,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:25:34,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:25:34,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34" (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 09:25:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:25:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-12-23 09:25:34,568 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-12-23 09:25:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:25:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-12-23 09:25:34,568 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-12-23 09:25:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:25:34,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:25:34,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:25:34,920 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:25:34,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:25:34 BoogieIcfgContainer [2020-12-23 09:25:34,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:25:34,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:25:34,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:25:34,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:25:34,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:25:34" (1/3) ... [2020-12-23 09:25:34,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe0b134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:25:34, skipping insertion in model container [2020-12-23 09:25:34,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:25:34" (2/3) ... [2020-12-23 09:25:34,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe0b134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:25:34, skipping insertion in model container [2020-12-23 09:25:34,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:25:34" (3/3) ... [2020-12-23 09:25:34,935 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-12-23 09:25:34,944 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:25:34,951 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:25:34,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:25:35,013 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:25:35,014 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:25:35,014 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:25:35,014 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:25:35,014 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:25:35,015 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:25:35,015 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:25:35,015 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:25:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-23 09:25:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:25:35,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:35,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:35,073 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2020-12-23 09:25:35,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:35,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052838120] [2020-12-23 09:25:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:35,573 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 09:25:35,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052838120] [2020-12-23 09:25:35,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:25:35,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:25:35,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343601457] [2020-12-23 09:25:35,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:25:35,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:35,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:25:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:25:35,620 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-12-23 09:25:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:35,850 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-12-23 09:25:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:25:35,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:25:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:35,870 INFO L225 Difference]: With dead ends: 39 [2020-12-23 09:25:35,871 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 09:25:35,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:25:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 09:25:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 09:25:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:25:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-23 09:25:35,946 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-12-23 09:25:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:35,948 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-23 09:25:35,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:25:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-23 09:25:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 09:25:35,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:35,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:35,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:25:35,954 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:35,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2020-12-23 09:25:35,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:35,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684872858] [2020-12-23 09:25:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:36,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:36,065 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 09:25:36,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684872858] [2020-12-23 09:25:36,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:25:36,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:25:36,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515410494] [2020-12-23 09:25:36,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:25:36,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:36,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:25:36,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:25:36,071 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-12-23 09:25:36,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:36,151 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-12-23 09:25:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:25:36,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 09:25:36,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:36,154 INFO L225 Difference]: With dead ends: 33 [2020-12-23 09:25:36,154 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 09:25:36,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:25:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 09:25:36,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-12-23 09:25:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:25:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-23 09:25:36,164 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-12-23 09:25:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:36,165 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-23 09:25:36,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:25:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-23 09:25:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 09:25:36,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:36,167 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 09:25:36,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:25:36,167 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:36,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2020-12-23 09:25:36,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:36,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852539368] [2020-12-23 09:25:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:36,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:36,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:36,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-23 09:25:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:36,350 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 09:25:36,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852539368] [2020-12-23 09:25:36,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466789159] [2020-12-23 09:25:36,355 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 09:25:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:36,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:25:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:36,782 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 09:25:36,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:36,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-12-23 09:25:36,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154957039] [2020-12-23 09:25:36,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:25:36,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:36,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:25:36,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:25:36,786 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-12-23 09:25:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:37,161 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-12-23 09:25:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:25:37,163 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-23 09:25:37,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:37,165 INFO L225 Difference]: With dead ends: 55 [2020-12-23 09:25:37,165 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 09:25:37,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:25:37,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 09:25:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-23 09:25:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 09:25:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-23 09:25:37,176 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-12-23 09:25:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:37,176 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-23 09:25:37,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:25:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-23 09:25:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 09:25:37,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:37,179 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 09:25:37,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 09:25:37,393 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2020-12-23 09:25:37,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:37,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459455225] [2020-12-23 09:25:37,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:37,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:37,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:37,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:37,600 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 09:25:37,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459455225] [2020-12-23 09:25:37,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972716040] [2020-12-23 09:25:37,601 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 09:25:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:37,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:25:37,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:37,795 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 09:25:37,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:37,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-12-23 09:25:37,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537141996] [2020-12-23 09:25:37,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:25:37,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:25:37,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:25:37,799 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 10 states. [2020-12-23 09:25:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:38,100 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-12-23 09:25:38,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 09:25:38,101 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-12-23 09:25:38,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:38,104 INFO L225 Difference]: With dead ends: 51 [2020-12-23 09:25:38,105 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 09:25:38,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:25:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 09:25:38,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-12-23 09:25:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 09:25:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-12-23 09:25:38,119 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-12-23 09:25:38,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:38,119 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-12-23 09:25:38,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:25:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-12-23 09:25:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 09:25:38,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:38,122 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 09:25:38,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:38,336 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:38,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2020-12-23 09:25:38,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:38,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603563926] [2020-12-23 09:25:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:38,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:38,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:38,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:38,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-23 09:25:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:38,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-12-23 09:25:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:38,507 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 09:25:38,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603563926] [2020-12-23 09:25:38,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714121050] [2020-12-23 09:25:38,508 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 09:25:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:38,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:25:38,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:38,803 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 09:25:38,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:38,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-12-23 09:25:38,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586315163] [2020-12-23 09:25:38,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:25:38,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:38,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:25:38,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:25:38,806 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-12-23 09:25:39,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:39,178 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-12-23 09:25:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 09:25:39,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-23 09:25:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:39,181 INFO L225 Difference]: With dead ends: 105 [2020-12-23 09:25:39,182 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 09:25:39,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:25:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 09:25:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 09:25:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 09:25:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-12-23 09:25:39,199 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-12-23 09:25:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:39,200 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-12-23 09:25:39,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:25:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-12-23 09:25:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 09:25:39,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:39,203 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 09:25:39,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:39,417 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:39,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:39,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2020-12-23 09:25:39,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:39,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128729795] [2020-12-23 09:25:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:39,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:39,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:39,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:39,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:39,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:39,595 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 09:25:39,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128729795] [2020-12-23 09:25:39,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555248137] [2020-12-23 09:25:39,596 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 09:25:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:39,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:25:39,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:39,809 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 09:25:39,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:39,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 09:25:39,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008543865] [2020-12-23 09:25:39,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:25:39,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:39,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:25:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:25:39,814 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 14 states. [2020-12-23 09:25:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:40,292 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-12-23 09:25:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:25:40,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-12-23 09:25:40,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:40,320 INFO L225 Difference]: With dead ends: 177 [2020-12-23 09:25:40,321 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 09:25:40,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:25:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 09:25:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-12-23 09:25:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 09:25:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-12-23 09:25:40,357 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-12-23 09:25:40,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:40,357 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-12-23 09:25:40,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:25:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-12-23 09:25:40,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 09:25:40,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:40,369 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 09:25:40,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:40,575 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2020-12-23 09:25:40,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:40,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750599276] [2020-12-23 09:25:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:40,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:40,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:40,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:40,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:40,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:40,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:40,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-23 09:25:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:40,744 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 09:25:40,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750599276] [2020-12-23 09:25:40,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030792079] [2020-12-23 09:25:40,745 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 09:25:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:40,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:25:40,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 09:25:40,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:40,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-12-23 09:25:40,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567621876] [2020-12-23 09:25:40,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 09:25:40,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 09:25:40,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:25:40,954 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 13 states. [2020-12-23 09:25:41,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:41,336 INFO L93 Difference]: Finished difference Result 262 states and 508 transitions. [2020-12-23 09:25:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 09:25:41,338 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-12-23 09:25:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:41,370 INFO L225 Difference]: With dead ends: 262 [2020-12-23 09:25:41,370 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 09:25:41,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:25:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 09:25:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 139. [2020-12-23 09:25:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 09:25:41,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2020-12-23 09:25:41,453 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 51 [2020-12-23 09:25:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:41,454 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2020-12-23 09:25:41,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 09:25:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2020-12-23 09:25:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 09:25:41,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:41,463 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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 09:25:41,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 09:25:41,677 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:41,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:41,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1130362923, now seen corresponding path program 1 times [2020-12-23 09:25:41,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:41,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969895072] [2020-12-23 09:25:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:41,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:41,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:41,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:41,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:41,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:41,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:41,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:25:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 09:25:41,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969895072] [2020-12-23 09:25:41,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421430000] [2020-12-23 09:25:41,962 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 09:25:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:42,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:25:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-23 09:25:42,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:42,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2020-12-23 09:25:42,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248921722] [2020-12-23 09:25:42,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 09:25:42,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:42,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 09:25:42,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:25:42,132 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand 15 states. [2020-12-23 09:25:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:42,549 INFO L93 Difference]: Finished difference Result 301 states and 580 transitions. [2020-12-23 09:25:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:25:42,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-12-23 09:25:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:42,553 INFO L225 Difference]: With dead ends: 301 [2020-12-23 09:25:42,553 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 09:25:42,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-12-23 09:25:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 09:25:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2020-12-23 09:25:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 09:25:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 123 transitions. [2020-12-23 09:25:42,605 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 123 transitions. Word has length 52 [2020-12-23 09:25:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:42,605 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 123 transitions. [2020-12-23 09:25:42,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 09:25:42,606 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 123 transitions. [2020-12-23 09:25:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 09:25:42,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:42,608 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:42,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:42,819 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:42,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1087717907, now seen corresponding path program 2 times [2020-12-23 09:25:42,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:42,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366833175] [2020-12-23 09:25:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:42,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:42,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:42,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:43,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:43,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:43,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:43,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:25:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:43,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:43,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:43,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:43,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 31 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 09:25:43,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366833175] [2020-12-23 09:25:43,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260273126] [2020-12-23 09:25:43,240 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 09:25:43,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:25:43,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:25:43,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 09:25:43,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-23 09:25:43,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:43,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2020-12-23 09:25:43,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033335979] [2020-12-23 09:25:43,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 09:25:43,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:43,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 09:25:43,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-12-23 09:25:43,502 INFO L87 Difference]: Start difference. First operand 80 states and 123 transitions. Second operand 20 states. [2020-12-23 09:25:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:44,098 INFO L93 Difference]: Finished difference Result 179 states and 304 transitions. [2020-12-23 09:25:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 09:25:44,099 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-12-23 09:25:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:44,101 INFO L225 Difference]: With dead ends: 179 [2020-12-23 09:25:44,101 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 09:25:44,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-12-23 09:25:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 09:25:44,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2020-12-23 09:25:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 09:25:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2020-12-23 09:25:44,114 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 79 [2020-12-23 09:25:44,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:44,115 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2020-12-23 09:25:44,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 09:25:44,115 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2020-12-23 09:25:44,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:25:44,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:44,117 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:44,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:44,333 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:44,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:44,334 INFO L82 PathProgramCache]: Analyzing trace with hash 780870354, now seen corresponding path program 1 times [2020-12-23 09:25:44,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:44,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810831152] [2020-12-23 09:25:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:44,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:44,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:44,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:44,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:44,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:44,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:44,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:25:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:44,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:44,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-23 09:25:44,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810831152] [2020-12-23 09:25:44,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583840549] [2020-12-23 09:25:44,761 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 09:25:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:44,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 09:25:44,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-23 09:25:45,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:45,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-12-23 09:25:45,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846962538] [2020-12-23 09:25:45,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 09:25:45,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:45,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 09:25:45,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:25:45,142 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand 21 states. [2020-12-23 09:25:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:45,289 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2020-12-23 09:25:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 09:25:45,290 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-12-23 09:25:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:45,291 INFO L225 Difference]: With dead ends: 91 [2020-12-23 09:25:45,291 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 09:25:45,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:25:45,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 09:25:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-12-23 09:25:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 09:25:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2020-12-23 09:25:45,302 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 65 [2020-12-23 09:25:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:45,302 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2020-12-23 09:25:45,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 09:25:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2020-12-23 09:25:45,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 09:25:45,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:25:45,304 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:25:45,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 09:25:45,519 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:25:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:25:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1851863125, now seen corresponding path program 1 times [2020-12-23 09:25:45,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:25:45,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251768808] [2020-12-23 09:25:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:25:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:25:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-23 09:25:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:25:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-12-23 09:25:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:25:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-23 09:25:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-23 09:25:45,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251768808] [2020-12-23 09:25:45,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181583779] [2020-12-23 09:25:45,746 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 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 09:25:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:25:45,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 09:25:45,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-23 09:25:45,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:45,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2020-12-23 09:25:45,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445449332] [2020-12-23 09:25:45,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:25:45,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:45,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:25:45,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:25:45,989 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand 17 states. [2020-12-23 09:25:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:25:46,268 INFO L93 Difference]: Finished difference Result 146 states and 204 transitions. [2020-12-23 09:25:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 09:25:46,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-12-23 09:25:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:25:46,270 INFO L225 Difference]: With dead ends: 146 [2020-12-23 09:25:46,270 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 09:25:46,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:25:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 09:25:46,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 09:25:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 09:25:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 09:25:46,272 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-12-23 09:25:46,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:25:46,273 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 09:25:46,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:25:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 09:25:46,273 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 09:25:46,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:25:46,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 09:25:46,988 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 15 [2020-12-23 09:25:47,272 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2020-12-23 09:25:47,332 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 09:25:47,332 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 09:25:47,332 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 09:25:47,332 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 09:25:47,333 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2020-12-23 09:25:47,333 INFO L185 CegarLoopUtils]: At program point L43(lines 37 44) the Hoare annotation is: (<= 4 ULTIMATE.start_main_~x~0) [2020-12-23 09:25:47,334 INFO L189 CegarLoopUtils]: For program point L41(line 41) no Hoare annotation was computed. [2020-12-23 09:25:47,334 INFO L189 CegarLoopUtils]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-12-23 09:25:47,334 INFO L185 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (and (<= 4 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 4)) [2020-12-23 09:25:47,334 INFO L189 CegarLoopUtils]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-12-23 09:25:47,334 INFO L189 CegarLoopUtils]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-12-23 09:25:47,335 INFO L192 CegarLoopUtils]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-12-23 09:25:47,335 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-12-23 09:25:47,335 INFO L189 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-12-23 09:25:47,335 INFO L185 CegarLoopUtils]: At program point L25-2(line 25) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#t~ret9| 1) .cse0 (<= 1 |fibo2_#t~ret9|)) (and (<= 4 fibo2_~n) .cse0))) (not (<= |fibo2_#in~n| 1))) [2020-12-23 09:25:47,335 INFO L189 CegarLoopUtils]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-12-23 09:25:47,336 INFO L189 CegarLoopUtils]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-12-23 09:25:47,336 INFO L189 CegarLoopUtils]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-12-23 09:25:47,336 INFO L189 CegarLoopUtils]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-12-23 09:25:47,336 INFO L189 CegarLoopUtils]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-12-23 09:25:47,336 INFO L192 CegarLoopUtils]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-12-23 09:25:47,336 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (not (<= |fibo1_#in~n| 2))) [2020-12-23 09:25:47,337 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-12-23 09:25:47,337 INFO L185 CegarLoopUtils]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse2 (= fibo1_~n |fibo1_#in~n|))) (let ((.cse0 (and (<= 4 fibo1_~n) .cse2 (<= |fibo1_#t~ret7| 2) (<= 2 |fibo1_#t~ret7|))) (.cse1 (and (<= 5 |fibo1_#in~n|) .cse2))) (and (or .cse0 (and (<= 1 |fibo1_#t~ret7|) (<= |fibo1_#t~ret7| 1)) .cse1) (or (and (<= |fibo1_#in~n| 3) .cse2) .cse0 .cse1) (not (<= |fibo1_#in~n| 2))))) [2020-12-23 09:25:47,337 INFO L189 CegarLoopUtils]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-12-23 09:25:47,337 INFO L189 CegarLoopUtils]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-12-23 09:25:47,337 INFO L189 CegarLoopUtils]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-12-23 09:25:47,337 INFO L189 CegarLoopUtils]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-12-23 09:25:47,338 INFO L189 CegarLoopUtils]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-12-23 09:25:47,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:25:47 BoogieIcfgContainer [2020-12-23 09:25:47,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:25:47,359 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:25:47,359 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:25:47,360 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:25:47,360 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:25:34" (3/4) ... [2020-12-23 09:25:47,365 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 09:25:47,374 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2020-12-23 09:25:47,374 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2020-12-23 09:25:47,380 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 09:25:47,380 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 09:25:47,380 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:25:47,381 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:25:47,437 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/fibo_2calls_4-1.c-witness.graphml [2020-12-23 09:25:47,437 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:25:47,439 INFO L168 Benchmark]: Toolchain (without parser) took 13340.98 ms. Allocated memory was 166.7 MB in the beginning and 289.4 MB in the end (delta: 122.7 MB). Free memory was 141.6 MB in the beginning and 230.7 MB in the end (delta: -89.1 MB). Peak memory consumption was 34.8 MB. Max. memory is 8.0 GB. [2020-12-23 09:25:47,439 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 166.7 MB. Free memory was 137.8 MB in the beginning and 137.7 MB in the end (delta: 102.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:25:47,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.69 ms. Allocated memory is still 166.7 MB. Free memory was 141.4 MB in the beginning and 132.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:25:47,441 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.51 ms. Allocated memory is still 166.7 MB. Free memory was 132.0 MB in the beginning and 130.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:25:47,441 INFO L168 Benchmark]: Boogie Preprocessor took 24.04 ms. Allocated memory is still 166.7 MB. Free memory was 130.7 MB in the beginning and 129.8 MB in the end (delta: 930.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:25:47,442 INFO L168 Benchmark]: RCFGBuilder took 469.55 ms. Allocated memory is still 166.7 MB. Free memory was 129.7 MB in the beginning and 116.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 09:25:47,443 INFO L168 Benchmark]: TraceAbstraction took 12433.24 ms. Allocated memory was 166.7 MB in the beginning and 289.4 MB in the end (delta: 122.7 MB). Free memory was 116.3 MB in the beginning and 233.3 MB in the end (delta: -117.1 MB). Peak memory consumption was 108.7 MB. Max. memory is 8.0 GB. [2020-12-23 09:25:47,445 INFO L168 Benchmark]: Witness Printer took 77.86 ms. Allocated memory is still 289.4 MB. Free memory was 233.3 MB in the beginning and 230.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:25:47,450 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 166.7 MB. Free memory was 137.8 MB in the beginning and 137.7 MB in the end (delta: 102.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 283.69 ms. Allocated memory is still 166.7 MB. Free memory was 141.4 MB in the beginning and 132.0 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 43.51 ms. Allocated memory is still 166.7 MB. Free memory was 132.0 MB in the beginning and 130.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.04 ms. Allocated memory is still 166.7 MB. Free memory was 130.7 MB in the beginning and 129.8 MB in the end (delta: 930.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 469.55 ms. Allocated memory is still 166.7 MB. Free memory was 129.7 MB in the beginning and 116.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12433.24 ms. Allocated memory was 166.7 MB in the beginning and 289.4 MB in the end (delta: 122.7 MB). Free memory was 116.3 MB in the beginning and 233.3 MB in the end (delta: -117.1 MB). Peak memory consumption was 108.7 MB. Max. memory is 8.0 GB. * Witness Printer took 77.86 ms. Allocated memory is still 289.4 MB. Free memory was 233.3 MB in the beginning and 230.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 4 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.4s, OverallIterations: 11, TraceHistogramMax: 7, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 304 SDtfs, 410 SDslu, 2091 SDs, 0 SdLazy, 2438 SolverSat, 351 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 738 GetRequests, 561 SyntacticMatches, 9 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred 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, 82 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 401 PreInvPairs, 483 NumberOfFragments, 111 HoareAnnotationTreeSize, 401 FomulaSimplifications, 684 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1093 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 913 NumberOfCodeBlocks, 913 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 893 ConstructedInterpolants, 0 QuantifiedInterpolants, 118245 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1249 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 680/968 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...