/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/id_b5_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:20:19,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:20:19,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:20:19,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:20:19,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:20:19,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:20:19,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:20:19,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:20:19,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:20:19,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:20:19,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:20:19,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:20:19,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:20:19,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:20:19,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:20:19,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:20:19,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:20:19,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:20:19,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:20:19,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:20:19,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:20:19,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:20:19,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:20:19,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:20:19,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:20:19,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:20:19,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:20:19,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:20:19,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:20:19,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:20:19,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:20:19,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:20:19,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:20:19,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:20:19,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:20:19,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:20:19,632 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 19:20:19,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:20:19,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:20:19,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:20:19,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:20:19,687 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:20:19,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:20:19,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:20:19,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:20:19,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:20:19,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:20:19,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:20:19,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:20:19,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:20:19,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:20:19,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:20:19,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:20:19,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:20:19,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:20:19,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:20:19,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:20:19,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:20:19,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:20:19,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:20:19,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:20:19,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:20:19,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:20:20,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:20:20,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:20:20,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:20:20,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:20:20,169 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:20:20,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_b5_o10-2.c [2021-01-06 19:20:20,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/83a288a1d/0607247ffc7c4ca5bead2efd813436ed/FLAGd654a8c4d [2021-01-06 19:20:20,782 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:20:20,783 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b5_o10-2.c [2021-01-06 19:20:20,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/83a288a1d/0607247ffc7c4ca5bead2efd813436ed/FLAGd654a8c4d [2021-01-06 19:20:21,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/83a288a1d/0607247ffc7c4ca5bead2efd813436ed [2021-01-06 19:20:21,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:20:21,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:20:21,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:21,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:20:21,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:20:21,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:21" (1/1) ... [2021-01-06 19:20:21,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6334093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21, skipping insertion in model container [2021-01-06 19:20:21,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:21" (1/1) ... [2021-01-06 19:20:21,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:20:21,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:20:21,449 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/id_b5_o10-2.c[530,543] [2021-01-06 19:20:21,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:21,474 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:20:21,495 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/id_b5_o10-2.c[530,543] [2021-01-06 19:20:21,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:21,513 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:20:21,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21 WrapperNode [2021-01-06 19:20:21,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:21,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:21,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:20:21,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:20:21,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21" (1/1) ... [2021-01-06 19:20:21,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21" (1/1) ... [2021-01-06 19:20:21,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:21,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:20:21,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:20:21,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:20:21,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21" (1/1) ... [2021-01-06 19:20:21,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21" (1/1) ... [2021-01-06 19:20:21,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21" (1/1) ... [2021-01-06 19:20:21,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21" (1/1) ... [2021-01-06 19:20:21,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21" (1/1) ... [2021-01-06 19:20:21,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21" (1/1) ... [2021-01-06 19:20:21,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21" (1/1) ... [2021-01-06 19:20:21,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:20:21,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:20:21,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:20:21,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:20:21,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21" (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 19:20:21,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:20:21,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:20:21,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:20:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-01-06 19:20:21,788 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-01-06 19:20:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:20:22,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:20:22,033 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:20:22,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:22 BoogieIcfgContainer [2021-01-06 19:20:22,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:20:22,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:20:22,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:20:22,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:20:22,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:20:21" (1/3) ... [2021-01-06 19:20:22,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da3ddeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:22, skipping insertion in model container [2021-01-06 19:20:22,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:21" (2/3) ... [2021-01-06 19:20:22,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da3ddeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:22, skipping insertion in model container [2021-01-06 19:20:22,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:22" (3/3) ... [2021-01-06 19:20:22,046 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2021-01-06 19:20:22,054 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:20:22,059 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:20:22,091 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:20:22,152 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:20:22,153 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:20:22,153 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:20:22,153 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:20:22,157 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:20:22,158 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:20:22,158 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:20:22,158 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:20:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 19:20:22,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 19:20:22,189 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:22,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:22,190 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:22,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1972897208, now seen corresponding path program 1 times [2021-01-06 19:20:22,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:22,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125582151] [2021-01-06 19:20:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:22,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:22,457 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 19:20:22,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125582151] [2021-01-06 19:20:22,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:22,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093443452] [2021-01-06 19:20:22,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:22,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:22,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:22,483 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2021-01-06 19:20:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:22,540 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-01-06 19:20:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:22,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 19:20:22,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:22,552 INFO L225 Difference]: With dead ends: 29 [2021-01-06 19:20:22,552 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 19:20:22,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 19:20:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 19:20:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 19:20:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 19:20:22,598 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2021-01-06 19:20:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:22,598 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 19:20:22,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 19:20:22,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 19:20:22,600 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:22,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:22,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:20:22,601 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:22,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1641441273, now seen corresponding path program 1 times [2021-01-06 19:20:22,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:22,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412524069] [2021-01-06 19:20:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:22,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:22,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:22,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412524069] [2021-01-06 19:20:22,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:22,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:22,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944856684] [2021-01-06 19:20:22,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:22,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:22,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:22,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:22,782 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2021-01-06 19:20:22,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:22,799 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-01-06 19:20:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:22,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-01-06 19:20:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:22,801 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:20:22,801 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 19:20:22,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:22,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 19:20:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-01-06 19:20:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 19:20:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-01-06 19:20:22,809 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2021-01-06 19:20:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:22,809 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-01-06 19:20:22,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-01-06 19:20:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 19:20:22,810 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:22,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:22,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 19:20:22,811 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1670070424, now seen corresponding path program 1 times [2021-01-06 19:20:22,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:22,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660977405] [2021-01-06 19:20:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:22,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:22,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:22,951 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 19:20:22,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660977405] [2021-01-06 19:20:22,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49590990] [2021-01-06 19:20:22,952 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 19:20:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:23,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 19:20:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:23,117 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 19:20:23,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:23,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 19:20:23,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616644219] [2021-01-06 19:20:23,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 19:20:23,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:23,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 19:20:23,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:20:23,121 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2021-01-06 19:20:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:23,168 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 19:20:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 19:20:23,168 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2021-01-06 19:20:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:23,170 INFO L225 Difference]: With dead ends: 24 [2021-01-06 19:20:23,170 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 19:20:23,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:20:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 19:20:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 19:20:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 19:20:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 19:20:23,176 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-01-06 19:20:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:23,177 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 19:20:23,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 19:20:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 19:20:23,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 19:20:23,178 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:23,178 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:23,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 19:20:23,395 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash -755943847, now seen corresponding path program 1 times [2021-01-06 19:20:23,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:23,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949580748] [2021-01-06 19:20:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:23,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:23,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:23,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 19:20:23,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949580748] [2021-01-06 19:20:23,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:23,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:23,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641368431] [2021-01-06 19:20:23,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:23,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:23,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:23,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:23,566 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2021-01-06 19:20:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:23,583 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-01-06 19:20:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:23,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2021-01-06 19:20:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:23,585 INFO L225 Difference]: With dead ends: 20 [2021-01-06 19:20:23,585 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 19:20:23,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 19:20:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 19:20:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 19:20:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 19:20:23,588 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-01-06 19:20:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:23,588 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 19:20:23,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 19:20:23,590 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 19:20:23,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 19:20:23,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 19:20:23,608 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 19:20:23,608 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 19:20:23,608 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 19:20:23,608 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 19:20:23,609 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-01-06 19:20:23,609 INFO L189 CegarLoopUtils]: For program point L17(line 17) no Hoare annotation was computed. [2021-01-06 19:20:23,609 INFO L189 CegarLoopUtils]: For program point L16(lines 16 18) no Hoare annotation was computed. [2021-01-06 19:20:23,609 INFO L192 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: true [2021-01-06 19:20:23,609 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-01-06 19:20:23,609 INFO L189 CegarLoopUtils]: For program point L13(lines 13 19) no Hoare annotation was computed. [2021-01-06 19:20:23,609 INFO L189 CegarLoopUtils]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2021-01-06 19:20:23,610 INFO L189 CegarLoopUtils]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2021-01-06 19:20:23,610 INFO L189 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-01-06 19:20:23,610 INFO L192 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: true [2021-01-06 19:20:23,610 INFO L192 CegarLoopUtils]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2021-01-06 19:20:23,610 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-01-06 19:20:23,610 INFO L189 CegarLoopUtils]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-01-06 19:20:23,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:20:23 BoogieIcfgContainer [2021-01-06 19:20:23,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:20:23,618 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:20:23,618 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:20:23,618 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:20:23,618 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:22" (3/4) ... [2021-01-06 19:20:23,622 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 19:20:23,630 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-01-06 19:20:23,636 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-01-06 19:20:23,637 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 19:20:23,637 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:20:23,637 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:20:23,678 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/id_b5_o10-2.c-witness.graphml [2021-01-06 19:20:23,678 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:20:23,680 INFO L168 Benchmark]: Toolchain (without parser) took 2519.29 ms. Allocated memory was 158.3 MB in the beginning and 194.0 MB in the end (delta: 35.7 MB). Free memory was 139.2 MB in the beginning and 136.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 38.5 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:23,681 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 158.3 MB. Free memory is still 130.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:20:23,681 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.51 ms. Allocated memory is still 158.3 MB. Free memory was 138.9 MB in the beginning and 129.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:23,682 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.95 ms. Allocated memory is still 158.3 MB. Free memory was 129.8 MB in the beginning and 128.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:23,683 INFO L168 Benchmark]: Boogie Preprocessor took 42.93 ms. Allocated memory is still 158.3 MB. Free memory was 128.4 MB in the beginning and 127.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:23,683 INFO L168 Benchmark]: RCFGBuilder took 434.50 ms. Allocated memory is still 158.3 MB. Free memory was 127.4 MB in the beginning and 130.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:23,684 INFO L168 Benchmark]: TraceAbstraction took 1579.95 ms. Allocated memory was 158.3 MB in the beginning and 194.0 MB in the end (delta: 35.7 MB). Free memory was 130.5 MB in the beginning and 139.0 MB in the end (delta: -8.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:23,685 INFO L168 Benchmark]: Witness Printer took 60.54 ms. Allocated memory is still 194.0 MB. Free memory was 139.0 MB in the beginning and 136.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:23,689 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 158.3 MB. Free memory is still 130.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 350.51 ms. Allocated memory is still 158.3 MB. Free memory was 138.9 MB in the beginning and 129.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.95 ms. Allocated memory is still 158.3 MB. Free memory was 129.8 MB in the beginning and 128.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.93 ms. Allocated memory is still 158.3 MB. Free memory was 128.4 MB in the beginning and 127.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 434.50 ms. Allocated memory is still 158.3 MB. Free memory was 127.4 MB in the beginning and 130.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1579.95 ms. Allocated memory was 158.3 MB in the beginning and 194.0 MB in the end (delta: 35.7 MB). Free memory was 130.5 MB in the beginning and 139.0 MB in the end (delta: -8.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 8.0 GB. * Witness Printer took 60.54 ms. Allocated memory is still 194.0 MB. Free memory was 139.0 MB in the beginning and 136.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 7 SDslu, 196 SDs, 0 SdLazy, 56 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=3, 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, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 2274 SizeOfPredicates, 1 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 23/27 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...