/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_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:18:37,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:18:37,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:18:37,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:18:37,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:18:37,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:18:37,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:18:37,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:18:38,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:18:38,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:18:38,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:18:38,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:18:38,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:18:38,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:18:38,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:18:38,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:18:38,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:18:38,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:18:38,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:18:38,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:18:38,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:18:38,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:18:38,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:18:38,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:18:38,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:18:38,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:18:38,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:18:38,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:18:38,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:18:38,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:18:38,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:18:38,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:18:38,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:18:38,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:18:38,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:18:38,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:18:38,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:18:38,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:18:38,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:18:38,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:18:38,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:18:38,111 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:18:38,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:18:38,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:18:38,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:18:38,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:18:38,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:18:38,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:18:38,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:18:38,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:18:38,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:18:38,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:18:38,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:18:38,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:18:38,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:18:38,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:18:38,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:18:38,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:18:38,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:18:38,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:18:38,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:18:38,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:18:38,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:18:38,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:18:38,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:18:38,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:18:38,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:18:38,581 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:18:38,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2021-01-06 19:18:38,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/05e1914d4/292bb7b255654e3c94315a2f31a3dd7e/FLAGb1ac25d7e [2021-01-06 19:18:39,327 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:18:39,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2021-01-06 19:18:39,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/05e1914d4/292bb7b255654e3c94315a2f31a3dd7e/FLAGb1ac25d7e [2021-01-06 19:18:39,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/05e1914d4/292bb7b255654e3c94315a2f31a3dd7e [2021-01-06 19:18:39,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:18:39,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:18:39,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:18:39,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:18:39,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:18:39,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:18:39" (1/1) ... [2021-01-06 19:18:39,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22092625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39, skipping insertion in model container [2021-01-06 19:18:39,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:18:39" (1/1) ... [2021-01-06 19:18:39,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:18:39,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:18:39,903 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_2-2.c[946,959] [2021-01-06 19:18:39,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:18:39,918 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:18:39,937 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_2-2.c[946,959] [2021-01-06 19:18:39,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:18:39,954 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:18:39,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39 WrapperNode [2021-01-06 19:18:39,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:18:39,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:18:39,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:18:39,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:18:39,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39" (1/1) ... [2021-01-06 19:18:39,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39" (1/1) ... [2021-01-06 19:18:39,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:18:39,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:18:39,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:18:39,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:18:40,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39" (1/1) ... [2021-01-06 19:18:40,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39" (1/1) ... [2021-01-06 19:18:40,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39" (1/1) ... [2021-01-06 19:18:40,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39" (1/1) ... [2021-01-06 19:18:40,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39" (1/1) ... [2021-01-06 19:18:40,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39" (1/1) ... [2021-01-06 19:18:40,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39" (1/1) ... [2021-01-06 19:18:40,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:18:40,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:18:40,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:18:40,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:18:40,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39" (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 [2021-01-06 19:18:40,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:18:40,135 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-01-06 19:18:40,135 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-01-06 19:18:40,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:18:40,135 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-01-06 19:18:40,136 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-01-06 19:18:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:18:40,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:18:40,422 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:18:40,423 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:18:40,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:18:40 BoogieIcfgContainer [2021-01-06 19:18:40,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:18:40,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:18:40,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:18:40,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:18:40,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:18:39" (1/3) ... [2021-01-06 19:18:40,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ac28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:18:40, skipping insertion in model container [2021-01-06 19:18:40,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:18:39" (2/3) ... [2021-01-06 19:18:40,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ac28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:18:40, skipping insertion in model container [2021-01-06 19:18:40,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:18:40" (3/3) ... [2021-01-06 19:18:40,438 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2021-01-06 19:18:40,448 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:18:40,454 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:18:40,488 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:18:40,558 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:18:40,558 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:18:40,558 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:18:40,559 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:18:40,559 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:18:40,559 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:18:40,559 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:18:40,559 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:18:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-01-06 19:18:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 19:18:40,595 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:18:40,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:18:40,596 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:18:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:18:40,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-01-06 19:18:40,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:18:40,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941366826] [2021-01-06 19:18:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:18:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:40,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:18:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:18:40,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941366826] [2021-01-06 19:18:40,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:18:40,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:18:40,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111576831] [2021-01-06 19:18:40,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:18:40,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:18:40,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:18:40,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:18:40,923 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2021-01-06 19:18:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:18:41,045 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-01-06 19:18:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:18:41,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 19:18:41,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:18:41,058 INFO L225 Difference]: With dead ends: 39 [2021-01-06 19:18:41,058 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 19:18:41,061 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 [2021-01-06 19:18:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 19:18:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 19:18:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 19:18:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-01-06 19:18:41,110 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-01-06 19:18:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:18:41,110 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-01-06 19:18:41,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:18:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-01-06 19:18:41,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 19:18:41,112 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:18:41,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:18:41,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:18:41,113 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:18:41,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:18:41,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-01-06 19:18:41,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:18:41,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171435082] [2021-01-06 19:18:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:18:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:41,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:18:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:18:41,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171435082] [2021-01-06 19:18:41,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:18:41,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:18:41,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690869405] [2021-01-06 19:18:41,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:18:41,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:18:41,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:18:41,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:18:41,190 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2021-01-06 19:18:41,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:18:41,244 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-01-06 19:18:41,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:18:41,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 19:18:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:18:41,246 INFO L225 Difference]: With dead ends: 33 [2021-01-06 19:18:41,246 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 19:18:41,247 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 [2021-01-06 19:18:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 19:18:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-01-06 19:18:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 19:18:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-01-06 19:18:41,257 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-01-06 19:18:41,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:18:41,257 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-01-06 19:18:41,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:18:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-01-06 19:18:41,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 19:18:41,259 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:18:41,260 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] [2021-01-06 19:18:41,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 19:18:41,260 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:18:41,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:18:41,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-01-06 19:18:41,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:18:41,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229798644] [2021-01-06 19:18:41,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:18:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:41,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:18:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:41,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:18:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:41,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-01-06 19:18:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 19:18:41,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229798644] [2021-01-06 19:18:41,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280768879] [2021-01-06 19:18:41,439 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 [2021-01-06 19:18:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:41,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 19:18:41,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:18:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 19:18:41,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:18:41,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-01-06 19:18:41,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418971673] [2021-01-06 19:18:41,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 19:18:41,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:18:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 19:18:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:18:41,820 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 11 states. [2021-01-06 19:18:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:18:42,012 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-01-06 19:18:42,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 19:18:42,012 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2021-01-06 19:18:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:18:42,014 INFO L225 Difference]: With dead ends: 55 [2021-01-06 19:18:42,014 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 19:18:42,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:18:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 19:18:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-01-06 19:18:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 19:18:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-01-06 19:18:42,026 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-01-06 19:18:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:18:42,026 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-01-06 19:18:42,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 19:18:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-01-06 19:18:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 19:18:42,028 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:18:42,028 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] [2021-01-06 19:18:42,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 19:18:42,244 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:18:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:18:42,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-01-06 19:18:42,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:18:42,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508898110] [2021-01-06 19:18:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:18:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:42,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:18:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:42,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:18:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:42,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-01-06 19:18:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:18:42,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508898110] [2021-01-06 19:18:42,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796446307] [2021-01-06 19:18:42,432 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 [2021-01-06 19:18:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:42,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 19:18:42,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:18:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:18:42,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:18:42,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 19:18:42,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159076577] [2021-01-06 19:18:42,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 19:18:42,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:18:42,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 19:18:42,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:18:42,579 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 10 states. [2021-01-06 19:18:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:18:42,629 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-01-06 19:18:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:18:42,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2021-01-06 19:18:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:18:42,632 INFO L225 Difference]: With dead ends: 43 [2021-01-06 19:18:42,633 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 19:18:42,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:18:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 19:18:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-01-06 19:18:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 19:18:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-01-06 19:18:42,643 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2021-01-06 19:18:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:18:42,644 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-01-06 19:18:42,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 19:18:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-01-06 19:18:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 19:18:42,646 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:18:42,646 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] [2021-01-06 19:18:42,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:18:42,860 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:18:42,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:18:42,861 INFO L82 PathProgramCache]: Analyzing trace with hash 988182601, now seen corresponding path program 1 times [2021-01-06 19:18:42,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:18:42,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195185351] [2021-01-06 19:18:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:18:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:42,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:18:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:42,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:18:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:42,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-01-06 19:18:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:18:42,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195185351] [2021-01-06 19:18:42,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068260425] [2021-01-06 19:18:42,959 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 [2021-01-06 19:18:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:43,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 19:18:43,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:18:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 19:18:43,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 19:18:43,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-01-06 19:18:43,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578172231] [2021-01-06 19:18:43,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 19:18:43,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:18:43,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 19:18:43,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:18:43,088 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 7 states. [2021-01-06 19:18:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:18:43,179 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-01-06 19:18:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:18:43,179 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2021-01-06 19:18:43,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:18:43,181 INFO L225 Difference]: With dead ends: 41 [2021-01-06 19:18:43,181 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 19:18:43,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:18:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 19:18:43,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-01-06 19:18:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 19:18:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-01-06 19:18:43,191 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 25 [2021-01-06 19:18:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:18:43,192 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-01-06 19:18:43,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 19:18:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-01-06 19:18:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 19:18:43,194 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:18:43,194 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] [2021-01-06 19:18:43,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:18:43,409 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:18:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:18:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-01-06 19:18:43,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:18:43,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546646326] [2021-01-06 19:18:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:18:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:43,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:18:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:43,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:18:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:43,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:18:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:43,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-01-06 19:18:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:43,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-01-06 19:18:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 19:18:43,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546646326] [2021-01-06 19:18:43,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793565916] [2021-01-06 19:18:43,590 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 [2021-01-06 19:18:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:18:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 19:18:43,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:18:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:18:43,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:18:43,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-01-06 19:18:43,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542872199] [2021-01-06 19:18:43,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 19:18:43,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:18:43,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 19:18:43,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-01-06 19:18:43,789 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 13 states. [2021-01-06 19:18:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:18:43,987 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2021-01-06 19:18:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:18:43,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2021-01-06 19:18:43,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:18:43,989 INFO L225 Difference]: With dead ends: 66 [2021-01-06 19:18:43,989 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 19:18:43,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:18:43,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 19:18:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 19:18:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 19:18:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 19:18:43,995 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-01-06 19:18:43,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:18:43,996 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 19:18:43,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 19:18:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 19:18:43,996 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 19:18:44,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:18:44,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 19:18:44,338 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 19:18:44,338 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 19:18:44,339 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 19:18:44,339 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 19:18:44,339 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2021-01-06 19:18:44,339 INFO L185 CegarLoopUtils]: At program point L43(lines 37 44) the Hoare annotation is: (= ULTIMATE.start_main_~x~0 2) [2021-01-06 19:18:44,339 INFO L189 CegarLoopUtils]: For program point L41(line 41) no Hoare annotation was computed. [2021-01-06 19:18:44,339 INFO L189 CegarLoopUtils]: For program point L40(lines 40 42) no Hoare annotation was computed. [2021-01-06 19:18:44,340 INFO L185 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (= ULTIMATE.start_main_~x~0 2) [2021-01-06 19:18:44,340 INFO L189 CegarLoopUtils]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-01-06 19:18:44,340 INFO L189 CegarLoopUtils]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2021-01-06 19:18:44,340 INFO L192 CegarLoopUtils]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2021-01-06 19:18:44,340 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-01-06 19:18:44,340 INFO L189 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-01-06 19:18:44,341 INFO L185 CegarLoopUtils]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-01-06 19:18:44,341 INFO L189 CegarLoopUtils]: For program point L22(lines 22 26) no Hoare annotation was computed. [2021-01-06 19:18:44,341 INFO L189 CegarLoopUtils]: For program point L25-3(line 25) no Hoare annotation was computed. [2021-01-06 19:18:44,341 INFO L189 CegarLoopUtils]: For program point L20(lines 20 26) no Hoare annotation was computed. [2021-01-06 19:18:44,341 INFO L189 CegarLoopUtils]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2021-01-06 19:18:44,341 INFO L189 CegarLoopUtils]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2021-01-06 19:18:44,341 INFO L192 CegarLoopUtils]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2021-01-06 19:18:44,342 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2021-01-06 19:18:44,342 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-01-06 19:18:44,342 INFO L185 CegarLoopUtils]: 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|)))) [2021-01-06 19:18:44,342 INFO L189 CegarLoopUtils]: For program point L12(lines 12 16) no Hoare annotation was computed. [2021-01-06 19:18:44,342 INFO L189 CegarLoopUtils]: For program point L15-3(line 15) no Hoare annotation was computed. [2021-01-06 19:18:44,342 INFO L189 CegarLoopUtils]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2021-01-06 19:18:44,343 INFO L189 CegarLoopUtils]: For program point L10(lines 10 16) no Hoare annotation was computed. [2021-01-06 19:18:44,343 INFO L189 CegarLoopUtils]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2021-01-06 19:18:44,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:18:44 BoogieIcfgContainer [2021-01-06 19:18:44,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:18:44,361 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:18:44,361 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:18:44,362 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:18:44,362 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:18:40" (3/4) ... [2021-01-06 19:18:44,366 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 19:18:44,374 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2021-01-06 19:18:44,374 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2021-01-06 19:18:44,379 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-01-06 19:18:44,380 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 19:18:44,380 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:18:44,380 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:18:44,429 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/fibo_2calls_2-2.c-witness.graphml [2021-01-06 19:18:44,429 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:18:44,432 INFO L168 Benchmark]: Toolchain (without parser) took 4741.01 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 134.4 MB in the beginning and 99.2 MB in the end (delta: 35.2 MB). Peak memory consumption was 68.7 MB. Max. memory is 8.0 GB. [2021-01-06 19:18:44,432 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 159.4 MB. Free memory is still 132.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:18:44,433 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.43 ms. Allocated memory is still 159.4 MB. Free memory was 134.2 MB in the beginning and 124.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:18:44,434 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.51 ms. Allocated memory is still 159.4 MB. Free memory was 124.8 MB in the beginning and 123.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:18:44,434 INFO L168 Benchmark]: Boogie Preprocessor took 23.14 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 122.4 MB in the end (delta: 925.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:18:44,435 INFO L168 Benchmark]: RCFGBuilder took 406.98 ms. Allocated memory is still 159.4 MB. Free memory was 122.4 MB in the beginning and 109.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 19:18:44,436 INFO L168 Benchmark]: TraceAbstraction took 3933.26 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 109.1 MB in the beginning and 101.9 MB in the end (delta: 7.2 MB). Peak memory consumption was 40.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:18:44,437 INFO L168 Benchmark]: Witness Printer took 68.12 ms. Allocated memory is still 191.9 MB. Free memory was 101.9 MB in the beginning and 99.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:18:44,441 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 159.4 MB. Free memory is still 132.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 262.43 ms. Allocated memory is still 159.4 MB. Free memory was 134.2 MB in the beginning and 124.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.51 ms. Allocated memory is still 159.4 MB. Free memory was 124.8 MB in the beginning and 123.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.14 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 122.4 MB in the end (delta: 925.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 406.98 ms. Allocated memory is still 159.4 MB. Free memory was 122.4 MB in the beginning and 109.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3933.26 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 109.1 MB in the beginning and 101.9 MB in the end (delta: 7.2 MB). Peak memory consumption was 40.4 MB. Max. memory is 8.0 GB. * Witness Printer took 68.12 ms. Allocated memory is still 191.9 MB. Free memory was 101.9 MB in the beginning and 99.2 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: x == 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 149 SDtfs, 93 SDslu, 697 SDs, 0 SdLazy, 501 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 8 LocationsWithAnnotation, 47 PreInvPairs, 57 NumberOfFragments, 50 HoareAnnotationTreeSize, 47 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 37 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 227 ConstructedInterpolants, 0 QuantifiedInterpolants, 13037 SizeOfPredicates, 10 NumberOfNonLiveVariables, 355 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 36/58 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...