/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:11:16,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:11:16,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:11:16,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:11:16,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:11:16,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:11:16,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:11:16,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:11:16,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:11:16,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:11:16,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:11:16,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:11:16,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:11:16,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:11:16,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:11:16,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:11:16,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:11:16,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:11:17,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:11:17,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:11:17,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:11:17,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:11:17,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:11:17,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:11:17,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:11:17,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:11:17,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:11:17,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:11:17,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:11:17,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:11:17,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:11:17,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:11:17,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:11:17,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:11:17,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:11:17,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:11:17,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:11:17,121 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:11:17,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:11:17,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:11:17,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:11:17,126 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:11:17,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:11:17,127 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:11:17,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:11:17,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:11:17,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:11:17,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:11:17,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:11:17,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:11:17,129 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:11:17,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:11:17,130 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:11:17,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:11:17,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:11:17,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:11:17,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:11:17,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:11:17,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:11:17,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:11:17,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:11:17,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:11:17,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:11:17,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:11:17,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:11:17,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:11:17,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:11:17,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:11:17,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:11:17,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:11:17,560 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:11:17,560 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:11:17,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-10-23 18:11:17,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9e3b747a/272875476cdd4206a2471767f26962cb/FLAGfbfe44947 [2020-10-23 18:11:18,342 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:11:18,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-10-23 18:11:18,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9e3b747a/272875476cdd4206a2471767f26962cb/FLAGfbfe44947 [2020-10-23 18:11:18,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9e3b747a/272875476cdd4206a2471767f26962cb [2020-10-23 18:11:18,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:11:18,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:11:18,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:11:18,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:11:18,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:11:18,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:11:18" (1/1) ... [2020-10-23 18:11:18,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b1cb49d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:11:18, skipping insertion in model container [2020-10-23 18:11:18,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:11:18" (1/1) ... [2020-10-23 18:11:18,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:11:18,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:11:18,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:11:18,969 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:11:18,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:11:19,006 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:11:19,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:11:19 WrapperNode [2020-10-23 18:11:19,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:11:19,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:11:19,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:11:19,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:11:19,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:11:19" (1/1) ... [2020-10-23 18:11:19,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:11:19" (1/1) ... [2020-10-23 18:11:19,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:11:19" (1/1) ... [2020-10-23 18:11:19,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:11:19" (1/1) ... [2020-10-23 18:11:19,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:11:19" (1/1) ... [2020-10-23 18:11:19,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:11:19" (1/1) ... [2020-10-23 18:11:19,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:11:19" (1/1) ... [2020-10-23 18:11:19,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:11:19,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:11:19,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:11:19,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:11:19,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:11:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:11:19,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:11:19,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:11:19,137 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:11:19,137 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-23 18:11:19,138 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-23 18:11:19,138 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:11:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:11:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:11:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:11:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:11:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:11:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-23 18:11:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-23 18:11:19,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:11:19,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:11:19,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:11:19,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:11:19,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:11:19,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:11:19,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:11:19,504 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:11:19,504 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:11:19,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:11:19 BoogieIcfgContainer [2020-10-23 18:11:19,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:11:19,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:11:19,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:11:19,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:11:19,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:11:18" (1/3) ... [2020-10-23 18:11:19,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2131cdf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:11:19, skipping insertion in model container [2020-10-23 18:11:19,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:11:19" (2/3) ... [2020-10-23 18:11:19,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2131cdf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:11:19, skipping insertion in model container [2020-10-23 18:11:19,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:11:19" (3/3) ... [2020-10-23 18:11:19,517 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-10-23 18:11:19,530 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:11:19,536 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:11:19,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:11:19,601 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:11:19,601 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:11:19,601 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:11:19,602 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:11:19,602 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:11:19,602 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:11:19,602 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:11:19,602 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:11:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-23 18:11:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:11:19,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:11:19,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:11:19,642 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:11:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:11:19,649 INFO L82 PathProgramCache]: Analyzing trace with hash 219823047, now seen corresponding path program 1 times [2020-10-23 18:11:19,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:11:19,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052080849] [2020-10-23 18:11:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:11:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:20,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:11:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:20,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:11:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:11:20,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052080849] [2020-10-23 18:11:20,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:11:20,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:11:20,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678583477] [2020-10-23 18:11:20,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:11:20,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:11:20,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:11:20,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:11:20,160 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2020-10-23 18:11:20,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:11:20,477 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-23 18:11:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:11:20,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:11:20,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:11:20,490 INFO L225 Difference]: With dead ends: 50 [2020-10-23 18:11:20,491 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:11:20,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:11:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:11:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:11:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:11:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-23 18:11:20,550 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 15 [2020-10-23 18:11:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:11:20,551 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-23 18:11:20,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:11:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-23 18:11:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:11:20,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:11:20,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:11:20,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:11:20,554 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:11:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:11:20,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1220716726, now seen corresponding path program 1 times [2020-10-23 18:11:20,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:11:20,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608637979] [2020-10-23 18:11:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:11:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:20,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:11:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:20,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:11:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:11:20,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608637979] [2020-10-23 18:11:20,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:11:20,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:11:20,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211092747] [2020-10-23 18:11:20,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:11:20,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:11:20,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:11:20,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:11:20,716 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2020-10-23 18:11:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:11:21,001 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-23 18:11:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:11:21,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-23 18:11:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:11:21,003 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:11:21,004 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:11:21,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:11:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:11:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-23 18:11:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:11:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-23 18:11:21,017 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 16 [2020-10-23 18:11:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:11:21,018 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-23 18:11:21,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:11:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-23 18:11:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:11:21,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:11:21,020 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, 1, 1, 1, 1, 1] [2020-10-23 18:11:21,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:11:21,021 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:11:21,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:11:21,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2083135015, now seen corresponding path program 1 times [2020-10-23 18:11:21,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:11:21,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563271360] [2020-10-23 18:11:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:11:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:21,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:11:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:21,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:11:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:21,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:11:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:21,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:11:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:11:21,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563271360] [2020-10-23 18:11:21,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357682818] [2020-10-23 18:11:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:11:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:21,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:11:21,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:11:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:11:21,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:11:21,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-10-23 18:11:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049695864] [2020-10-23 18:11:21,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:11:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:11:21,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:11:21,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:11:21,369 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 12 states. [2020-10-23 18:11:21,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:11:21,976 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-10-23 18:11:21,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:11:21,977 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-23 18:11:21,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:11:21,979 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:11:21,979 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 18:11:21,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:11:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 18:11:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-23 18:11:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:11:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-23 18:11:21,991 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 28 [2020-10-23 18:11:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:11:21,992 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-23 18:11:21,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:11:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-23 18:11:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:11:21,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:11:21,994 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, 1, 1, 1, 1, 1] [2020-10-23 18:11:22,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:11:22,208 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:11:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:11:22,210 INFO L82 PathProgramCache]: Analyzing trace with hash 752879968, now seen corresponding path program 1 times [2020-10-23 18:11:22,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:11:22,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727874995] [2020-10-23 18:11:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:11:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:22,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:11:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:22,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:11:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:22,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:11:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:22,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:11:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:11:22,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727874995] [2020-10-23 18:11:22,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250596127] [2020-10-23 18:11:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:11:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:22,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-23 18:11:22,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:11:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:11:22,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:11:22,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-23 18:11:22,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344462083] [2020-10-23 18:11:22,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:11:22,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:11:22,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:11:22,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:11:22,631 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 11 states. [2020-10-23 18:11:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:11:23,257 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-10-23 18:11:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:11:23,259 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-23 18:11:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:11:23,262 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:11:23,263 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:11:23,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:11:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:11:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-23 18:11:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 18:11:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-10-23 18:11:23,285 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 29 [2020-10-23 18:11:23,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:11:23,286 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-10-23 18:11:23,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:11:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-10-23 18:11:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:11:23,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:11:23,290 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-23 18:11:23,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:11:23,507 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:11:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:11:23,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1703344845, now seen corresponding path program 1 times [2020-10-23 18:11:23,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:11:23,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251939401] [2020-10-23 18:11:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:11:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:23,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:11:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:23,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:11:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:23,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:11:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:23,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:11:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:11:23,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251939401] [2020-10-23 18:11:23,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127583027] [2020-10-23 18:11:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:11:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:11:23,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:11:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:11:23,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:11:23,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2020-10-23 18:11:23,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734403016] [2020-10-23 18:11:23,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:11:23,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:11:23,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:11:23,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:11:23,822 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 7 states. [2020-10-23 18:11:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:11:23,958 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-10-23 18:11:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:11:23,958 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-23 18:11:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:11:23,961 INFO L225 Difference]: With dead ends: 47 [2020-10-23 18:11:23,961 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 18:11:23,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:11:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 18:11:23,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-23 18:11:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 18:11:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-10-23 18:11:23,972 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 30 [2020-10-23 18:11:23,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:11:23,972 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-10-23 18:11:23,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:11:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-10-23 18:11:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 18:11:23,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:11:23,974 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, 1, 1, 1, 1] [2020-10-23 18:11:24,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:11:24,190 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:11:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:11:24,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2070859795, now seen corresponding path program 1 times [2020-10-23 18:11:24,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:11:24,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553957314] [2020-10-23 18:11:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:11:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:24,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:11:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:24,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:11:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:24,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:11:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:24,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:11:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:24,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:11:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:24,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-23 18:11:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:11:24,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553957314] [2020-10-23 18:11:24,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228849774] [2020-10-23 18:11:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 18:11:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:11:24,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:11:24,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:11:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:11:24,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:11:24,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-23 18:11:24,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928744391] [2020-10-23 18:11:24,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:11:24,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:11:24,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:11:24,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:11:24,561 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 14 states. [2020-10-23 18:11:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:11:25,245 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2020-10-23 18:11:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:11:25,246 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-23 18:11:25,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:11:25,246 INFO L225 Difference]: With dead ends: 71 [2020-10-23 18:11:25,247 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:11:25,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:11:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:11:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:11:25,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:11:25,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:11:25,251 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-10-23 18:11:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:11:25,252 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:11:25,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:11:25,252 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:11:25,252 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:11:25,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:11:25,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:11:25,780 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 13 [2020-10-23 18:11:25,896 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:11:25,897 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:11:25,897 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:11:25,897 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:11:25,897 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:11:25,897 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:11:25,898 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:11:25,898 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:11:25,898 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:11:25,898 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:11:25,898 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:11:25,898 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 37 44) the Hoare annotation is: true [2020-10-23 18:11:25,898 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 37 44) no Hoare annotation was computed. [2020-10-23 18:11:25,898 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 37 44) no Hoare annotation was computed. [2020-10-23 18:11:25,898 INFO L270 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: false [2020-10-23 18:11:25,898 INFO L274 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-10-23 18:11:25,899 INFO L274 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-10-23 18:11:25,899 INFO L270 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (= main_~x~0 2) [2020-10-23 18:11:25,899 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-10-23 18:11:25,899 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-10-23 18:11:25,899 INFO L277 CegarLoopResult]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-10-23 18:11:25,899 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-10-23 18:11:25,899 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-23 18:11:25,899 INFO L270 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-10-23 18:11:25,899 INFO L274 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-10-23 18:11:25,900 INFO L274 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-10-23 18:11:25,900 INFO L274 CegarLoopResult]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-10-23 18:11:25,900 INFO L274 CegarLoopResult]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-10-23 18:11:25,900 INFO L274 CegarLoopResult]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-10-23 18:11:25,900 INFO L277 CegarLoopResult]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-10-23 18:11:25,900 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-10-23 18:11:25,900 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-23 18:11:25,900 INFO L270 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 1 |fibo1_#t~ret7|) (< 1 fibo1_~n) (<= |fibo1_#t~ret7| 1) .cse0) (and .cse0 (< 2 |fibo1_#in~n|)))) [2020-10-23 18:11:25,901 INFO L274 CegarLoopResult]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-10-23 18:11:25,901 INFO L274 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-10-23 18:11:25,901 INFO L274 CegarLoopResult]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-10-23 18:11:25,901 INFO L274 CegarLoopResult]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-10-23 18:11:25,901 INFO L274 CegarLoopResult]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-10-23 18:11:25,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:11:25 BoogieIcfgContainer [2020-10-23 18:11:25,907 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:11:25,909 INFO L168 Benchmark]: Toolchain (without parser) took 7183.57 ms. Allocated memory was 159.4 MB in the beginning and 197.1 MB in the end (delta: 37.7 MB). Free memory was 135.1 MB in the beginning and 107.8 MB in the end (delta: 27.3 MB). Peak memory consumption was 66.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:11:25,909 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 159.4 MB. Free memory is still 132.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:11:25,910 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.46 ms. Allocated memory is still 159.4 MB. Free memory was 134.3 MB in the beginning and 125.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:11:25,911 INFO L168 Benchmark]: Boogie Preprocessor took 36.99 ms. Allocated memory is still 159.4 MB. Free memory was 125.1 MB in the beginning and 123.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:11:25,912 INFO L168 Benchmark]: RCFGBuilder took 460.20 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 142.7 MB in the end (delta: -19.1 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:11:25,913 INFO L168 Benchmark]: TraceAbstraction took 6398.56 ms. Allocated memory was 159.4 MB in the beginning and 197.1 MB in the end (delta: 37.7 MB). Free memory was 142.5 MB in the beginning and 107.8 MB in the end (delta: 34.7 MB). Peak memory consumption was 73.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:11:25,916 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 159.4 MB. Free memory is still 132.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 271.46 ms. Allocated memory is still 159.4 MB. Free memory was 134.3 MB in the beginning and 125.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.99 ms. Allocated memory is still 159.4 MB. Free memory was 125.1 MB in the beginning and 123.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 460.20 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 142.7 MB in the end (delta: -19.1 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6398.56 ms. Allocated memory was 159.4 MB in the beginning and 197.1 MB in the end (delta: 37.7 MB). Free memory was 142.5 MB in the beginning and 107.8 MB in the end (delta: 34.7 MB). Peak memory consumption was 73.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 160 SDtfs, 205 SDslu, 357 SDs, 0 SdLazy, 937 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 160 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 57 PreInvPairs, 66 NumberOfFragments, 83 HoareAnnotationTreeSize, 57 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 13 FomulaSimplificationsInter, 325 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 287 NumberOfCodeBlocks, 287 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 277 ConstructedInterpolants, 0 QuantifiedInterpolants, 21521 SizeOfPredicates, 10 NumberOfNonLiveVariables, 535 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 35/58 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...