/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:08:28,173 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 22:08:28,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:08:28,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:08:28,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:08:28,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:08:28,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:08:28,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:08:28,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:08:28,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:08:28,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:08:28,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:08:28,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:08:28,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:08:28,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:08:28,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:08:28,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:08:28,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:08:28,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:08:28,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:08:28,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:08:28,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:08:28,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:08:28,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:08:28,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:08:28,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:08:28,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 22:08:28,294 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:08:28,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:08:28,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:08:28,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:08:28,296 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:08:28,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:08:28,296 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:08:28,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:08:28,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:08:28,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:08:28,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:08:28,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:08:28,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:08:28,298 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:08:28,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:08:28,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:08:28,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:08:28,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:08:28,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:08:28,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:08:28,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:08:28,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:08:28,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:08:28,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:08:28,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:08:28,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:08:28,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:08:28,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:08:28,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:08:28,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:08:28,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:08:28,641 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:08:28,645 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:08:28,646 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:08:28,650 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:08:28,650 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-08-21 22:08:28,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ee5cc6d0/da092875adfc48f0808474102775998e/FLAG5decf8067 [2020-08-21 22:08:29,223 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:08:29,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/gcd01-1.c [2020-08-21 22:08:29,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ee5cc6d0/da092875adfc48f0808474102775998e/FLAG5decf8067 [2020-08-21 22:08:29,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ee5cc6d0/da092875adfc48f0808474102775998e [2020-08-21 22:08:29,600 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:08:29,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:08:29,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:08:29,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:08:29,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:08:29,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:08:29" (1/1) ... [2020-08-21 22:08:29,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e7cadc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:29, skipping insertion in model container [2020-08-21 22:08:29,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:08:29" (1/1) ... [2020-08-21 22:08:29,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:08:29,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:08:29,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:08:29,831 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:08:29,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:08:29,860 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:08:29,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:29 WrapperNode [2020-08-21 22:08:29,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:08:29,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:08:29,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:08:29,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:08:29,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:29" (1/1) ... [2020-08-21 22:08:29,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:29" (1/1) ... [2020-08-21 22:08:29,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:29" (1/1) ... [2020-08-21 22:08:29,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:29" (1/1) ... [2020-08-21 22:08:29,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:29" (1/1) ... [2020-08-21 22:08:29,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:29" (1/1) ... [2020-08-21 22:08:29,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:29" (1/1) ... [2020-08-21 22:08:29,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:08:29,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:08:29,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:08:29,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:08:29,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:08:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:08:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:08:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-08-21 22:08:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:08:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:08:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:08:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-08-21 22:08:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:08:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:08:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:08:30,243 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:08:30,244 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:08:30,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:08:30 BoogieIcfgContainer [2020-08-21 22:08:30,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:08:30,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:08:30,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:08:30,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:08:30,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:08:29" (1/3) ... [2020-08-21 22:08:30,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b74e348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:08:30, skipping insertion in model container [2020-08-21 22:08:30,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:29" (2/3) ... [2020-08-21 22:08:30,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b74e348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:08:30, skipping insertion in model container [2020-08-21 22:08:30,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:08:30" (3/3) ... [2020-08-21 22:08:30,259 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-08-21 22:08:30,271 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:08:30,291 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:08:30,335 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:08:30,389 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:08:30,389 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:08:30,389 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:08:30,389 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:08:30,390 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:08:30,390 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:08:30,390 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:08:30,390 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:08:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-21 22:08:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 22:08:30,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:30,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:08:30,418 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:30,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:30,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-08-21 22:08:30,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:30,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6442893] [2020-08-21 22:08:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 22:08:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:30,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6442893] [2020-08-21 22:08:30,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:30,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:08:30,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505704669] [2020-08-21 22:08:30,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:08:30,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:08:30,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:08:30,779 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-08-21 22:08:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:30,906 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-08-21 22:08:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:08:30,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-08-21 22:08:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:30,922 INFO L225 Difference]: With dead ends: 40 [2020-08-21 22:08:30,923 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 22:08:30,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:08:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 22:08:30,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 22:08:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 22:08:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-08-21 22:08:30,978 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-08-21 22:08:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:30,979 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-08-21 22:08:30,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:08:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-08-21 22:08:30,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 22:08:30,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:30,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:08:30,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:08:30,983 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-08-21 22:08:30,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:30,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869945539] [2020-08-21 22:08:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 22:08:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:31,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869945539] [2020-08-21 22:08:31,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:31,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 22:08:31,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18478097] [2020-08-21 22:08:31,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:08:31,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:31,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:08:31,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:08:31,090 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 7 states. [2020-08-21 22:08:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:31,172 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-08-21 22:08:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:08:31,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-08-21 22:08:31,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:31,174 INFO L225 Difference]: With dead ends: 30 [2020-08-21 22:08:31,174 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 22:08:31,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:08:31,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 22:08:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-21 22:08:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 22:08:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-08-21 22:08:31,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-08-21 22:08:31,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:31,185 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-08-21 22:08:31,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:08:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-08-21 22:08:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:08:31,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:31,187 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] [2020-08-21 22:08:31,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:08:31,187 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:31,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-08-21 22:08:31,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:31,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823748836] [2020-08-21 22:08:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 22:08:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 22:08:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 22:08:31,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823748836] [2020-08-21 22:08:31,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:31,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 22:08:31,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509329533] [2020-08-21 22:08:31,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:08:31,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:08:31,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:08:31,336 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 7 states. [2020-08-21 22:08:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:31,476 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-08-21 22:08:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:08:31,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-08-21 22:08:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:31,478 INFO L225 Difference]: With dead ends: 36 [2020-08-21 22:08:31,478 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 22:08:31,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:08:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 22:08:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 22:08:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 22:08:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-08-21 22:08:31,487 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2020-08-21 22:08:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:31,488 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-08-21 22:08:31,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:08:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-08-21 22:08:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:08:31,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:31,490 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] [2020-08-21 22:08:31,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:08:31,490 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:31,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:31,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-08-21 22:08:31,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:31,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334144993] [2020-08-21 22:08:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 22:08:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 22:08:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 22:08:31,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334144993] [2020-08-21 22:08:31,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:31,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:08:31,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033756874] [2020-08-21 22:08:31,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:08:31,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:31,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:08:31,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:08:31,649 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-08-21 22:08:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:31,783 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-21 22:08:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:08:31,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-08-21 22:08:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:31,785 INFO L225 Difference]: With dead ends: 36 [2020-08-21 22:08:31,785 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 22:08:31,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:08:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 22:08:31,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-21 22:08:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 22:08:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-08-21 22:08:31,793 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23 [2020-08-21 22:08:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:31,794 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-08-21 22:08:31,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:08:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-08-21 22:08:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:08:31,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:31,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:08:31,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:08:31,796 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:31,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-08-21 22:08:31,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:31,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246525597] [2020-08-21 22:08:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 22:08:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 22:08:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 22:08:31,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246525597] [2020-08-21 22:08:31,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:31,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 22:08:31,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932651261] [2020-08-21 22:08:31,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:08:31,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:31,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:08:31,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:08:31,881 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-08-21 22:08:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:31,927 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-08-21 22:08:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:08:31,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-21 22:08:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:31,929 INFO L225 Difference]: With dead ends: 31 [2020-08-21 22:08:31,929 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 22:08:31,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:08:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 22:08:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-08-21 22:08:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 22:08:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-21 22:08:31,936 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2020-08-21 22:08:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:31,937 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-21 22:08:31,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:08:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-21 22:08:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:08:31,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:31,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:08:31,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:08:31,939 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-08-21 22:08:31,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:31,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374609090] [2020-08-21 22:08:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 22:08:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:32,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 22:08:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 22:08:32,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374609090] [2020-08-21 22:08:32,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:32,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:08:32,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013587158] [2020-08-21 22:08:32,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:08:32,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:08:32,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:08:32,036 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-08-21 22:08:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:32,105 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-08-21 22:08:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:08:32,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-21 22:08:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:32,107 INFO L225 Difference]: With dead ends: 34 [2020-08-21 22:08:32,107 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 22:08:32,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:08:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 22:08:32,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 22:08:32,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:08:32,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-08-21 22:08:32,114 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-08-21 22:08:32,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:32,115 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-08-21 22:08:32,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:08:32,115 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-08-21 22:08:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 22:08:32,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:32,117 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:08:32,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:08:32,117 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:32,118 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-08-21 22:08:32,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:32,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835285881] [2020-08-21 22:08:32,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:32,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:32,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 22:08:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:32,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 22:08:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:32,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 22:08:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 22:08:32,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835285881] [2020-08-21 22:08:32,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:32,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:08:32,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584725099] [2020-08-21 22:08:32,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:08:32,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:32,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:08:32,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:08:32,259 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states. [2020-08-21 22:08:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:32,333 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-08-21 22:08:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:08:32,334 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-08-21 22:08:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:32,335 INFO L225 Difference]: With dead ends: 30 [2020-08-21 22:08:32,335 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:08:32,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:08:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:08:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:08:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:08:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:08:32,338 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-08-21 22:08:32,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:32,338 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:08:32,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:08:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:08:32,338 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:08:32,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:08:32,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:08:32,415 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 22:08:32,416 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:08:32,416 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-08-21 22:08:32,416 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-08-21 22:08:32,416 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= (+ gcd_~y1 1) gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-08-21 22:08:32,417 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-08-21 22:08:32,417 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-08-21 22:08:32,417 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-08-21 22:08:32,417 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-08-21 22:08:32,417 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 22:08:32,418 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-08-21 22:08:32,418 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-08-21 22:08:32,418 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:08:32,418 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:08:32,418 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:08:32,418 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:08:32,419 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-21 22:08:32,419 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-08-21 22:08:32,419 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-08-21 22:08:32,419 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-08-21 22:08:32,420 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-21 22:08:32,420 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-08-21 22:08:32,420 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-08-21 22:08:32,420 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-08-21 22:08:32,420 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-21 22:08:32,421 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-08-21 22:08:32,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:08:32 BoogieIcfgContainer [2020-08-21 22:08:32,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:08:32,431 INFO L168 Benchmark]: Toolchain (without parser) took 2828.63 ms. Allocated memory was 140.5 MB in the beginning and 234.4 MB in the end (delta: 93.8 MB). Free memory was 103.8 MB in the beginning and 94.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 103.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:08:32,432 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 22:08:32,433 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.92 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:08:32,434 INFO L168 Benchmark]: Boogie Preprocessor took 112.50 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.6 MB in the beginning and 181.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:08:32,435 INFO L168 Benchmark]: RCFGBuilder took 275.42 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 169.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-21 22:08:32,436 INFO L168 Benchmark]: TraceAbstraction took 2177.31 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 168.6 MB in the beginning and 94.1 MB in the end (delta: 74.5 MB). Peak memory consumption was 105.4 MB. Max. memory is 7.1 GB. [2020-08-21 22:08:32,440 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.92 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.50 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.6 MB in the beginning and 181.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 275.42 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 169.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2177.31 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 168.6 MB in the beginning and 94.1 MB in the end (delta: 74.5 MB). Peak memory consumption was 105.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 138 SDtfs, 103 SDslu, 517 SDs, 0 SdLazy, 330 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, 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, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 42 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 157 NumberOfCodeBlocks, 157 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 7192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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...