/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:05:53,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:05:53,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:05:53,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:05:53,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:05:53,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:05:53,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:05:53,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:05:53,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:05:53,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:05:53,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:05:53,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:05:53,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:05:53,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:05:53,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:05:53,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:05:53,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:05:53,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:05:53,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:05:53,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:05:53,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:05:53,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:05:53,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:05:53,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:05:53,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:05:53,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:05:53,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:05:53,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:05:53,583 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 [2020-08-18 17:05:53,605 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:05:53,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:05:53,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:05:53,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:05:53,607 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:05:53,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:05:53,608 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:05:53,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:05:53,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:05:53,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:05:53,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:05:53,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:05:53,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:05:53,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:05:53,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:05:53,610 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:05:53,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:05:53,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:05:53,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:05:53,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:05:53,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:05:53,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:05:53,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:05:53,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:05:53,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:05:53,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:05:53,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:05:53,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:05:53,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:05:53,612 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=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:05:53,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:05:53,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:05:53,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:05:53,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:05:53,935 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:05:53,937 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test11.c [2020-08-18 17:05:54,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02f0fd213/b8dea896a7034a2faf37203626dfb385/FLAG002dc3105 [2020-08-18 17:05:54,503 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:05:54,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test11.c [2020-08-18 17:05:54,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02f0fd213/b8dea896a7034a2faf37203626dfb385/FLAG002dc3105 [2020-08-18 17:05:54,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02f0fd213/b8dea896a7034a2faf37203626dfb385 [2020-08-18 17:05:54,879 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:05:54,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:05:54,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:05:54,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:05:54,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:05:54,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:05:54" (1/1) ... [2020-08-18 17:05:54,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@664bf5ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:54, skipping insertion in model container [2020-08-18 17:05:54,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:05:54" (1/1) ... [2020-08-18 17:05:54,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:05:54,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:05:55,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:05:55,112 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:05:55,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:05:55,153 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:05:55,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:55 WrapperNode [2020-08-18 17:05:55,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:05:55,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:05:55,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:05:55,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:05:55,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:55" (1/1) ... [2020-08-18 17:05:55,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:55" (1/1) ... [2020-08-18 17:05:55,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:55" (1/1) ... [2020-08-18 17:05:55,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:55" (1/1) ... [2020-08-18 17:05:55,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:55" (1/1) ... [2020-08-18 17:05:55,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:55" (1/1) ... [2020-08-18 17:05:55,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:55" (1/1) ... [2020-08-18 17:05:55,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:05:55,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:05:55,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:05:55,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:05:55,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:55" (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 [2020-08-18 17:05:55,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:05:55,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:05:55,388 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-08-18 17:05:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:05:55,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:05:55,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:05:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 17:05:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-08-18 17:05:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:05:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:05:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 17:05:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:05:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:05:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:05:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:05:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:05:55,822 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:05:55,822 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 17:05:55,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:05:55 BoogieIcfgContainer [2020-08-18 17:05:55,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:05:55,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:05:55,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:05:55,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:05:55,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:05:54" (1/3) ... [2020-08-18 17:05:55,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ea1f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:05:55, skipping insertion in model container [2020-08-18 17:05:55,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:55" (2/3) ... [2020-08-18 17:05:55,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ea1f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:05:55, skipping insertion in model container [2020-08-18 17:05:55,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:05:55" (3/3) ... [2020-08-18 17:05:55,835 INFO L109 eAbstractionObserver]: Analyzing ICFG test11.c [2020-08-18 17:05:55,846 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:05:55,853 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:05:55,868 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:05:55,892 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:05:55,892 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:05:55,893 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:05:55,893 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:05:55,893 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:05:55,893 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:05:55,893 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:05:55,893 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:05:55,914 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-08-18 17:05:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 17:05:55,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:55,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:55,921 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash -722462527, now seen corresponding path program 1 times [2020-08-18 17:05:55,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:55,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031309994] [2020-08-18 17:05:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:56,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:56,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:05:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:56,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031309994] [2020-08-18 17:05:56,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:56,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:56,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921616621] [2020-08-18 17:05:56,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:56,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:56,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:56,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:56,267 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-08-18 17:05:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:56,381 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-08-18 17:05:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:56,383 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-18 17:05:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:56,394 INFO L225 Difference]: With dead ends: 31 [2020-08-18 17:05:56,394 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 17:05:56,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 17:05:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-18 17:05:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-18 17:05:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-08-18 17:05:56,440 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-08-18 17:05:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:56,441 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-08-18 17:05:56,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-08-18 17:05:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:05:56,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:56,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:56,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:05:56,443 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:56,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:56,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1499811687, now seen corresponding path program 1 times [2020-08-18 17:05:56,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:56,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886316261] [2020-08-18 17:05:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:56,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:56,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:05:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:56,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886316261] [2020-08-18 17:05:56,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:56,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:05:56,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139649225] [2020-08-18 17:05:56,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:05:56,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:56,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:05:56,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:56,570 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-08-18 17:05:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:56,672 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-08-18 17:05:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:05:56,673 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-18 17:05:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:56,674 INFO L225 Difference]: With dead ends: 21 [2020-08-18 17:05:56,675 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 17:05:56,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:05:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 17:05:56,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-18 17:05:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-18 17:05:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-18 17:05:56,683 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2020-08-18 17:05:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:56,684 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-18 17:05:56,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:05:56,684 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-18 17:05:56,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:05:56,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:56,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:56,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:05:56,686 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:56,686 INFO L82 PathProgramCache]: Analyzing trace with hash -750476091, now seen corresponding path program 1 times [2020-08-18 17:05:56,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:56,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174697349] [2020-08-18 17:05:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:56,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:56,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:05:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:56,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174697349] [2020-08-18 17:05:56,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:56,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:56,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060543163] [2020-08-18 17:05:56,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:56,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:56,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:56,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:56,807 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-18 17:05:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:56,886 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-08-18 17:05:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:56,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 17:05:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:56,887 INFO L225 Difference]: With dead ends: 19 [2020-08-18 17:05:56,887 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:05:56,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:05:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:05:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:05:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:05:56,889 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-08-18 17:05:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:56,890 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:05:56,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:05:56,890 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:05:56,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:05:56,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:05:56,963 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:05:56,964 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#b~0.offset| |old(~#b~0.offset)|) (= |old(#length)| |#length|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-18 17:05:56,964 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:05:56,964 INFO L268 CegarLoopResult]: For program point get_dummyFINAL(lines 7 10) no Hoare annotation was computed. [2020-08-18 17:05:56,965 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-18 17:05:56,965 INFO L271 CegarLoopResult]: At program point get_dummyENTRY(lines 7 10) the Hoare annotation is: true [2020-08-18 17:05:56,965 INFO L268 CegarLoopResult]: For program point get_dummyEXIT(lines 7 10) no Hoare annotation was computed. [2020-08-18 17:05:56,965 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:05:56,965 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 17:05:56,965 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 17:05:56,965 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:05:56,966 INFO L264 CegarLoopResult]: At program point L25(lines 12 32) the Hoare annotation is: false [2020-08-18 17:05:56,966 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2020-08-18 17:05:56,966 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-08-18 17:05:56,966 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (and (= main_~pc~0.base |main_~#c~0.base|) (not (= main_~pc~0.base 0)) (= |main_~#c~0.offset| main_~pc~0.offset)) [2020-08-18 17:05:56,966 INFO L268 CegarLoopResult]: For program point L19-2(line 19) no Hoare annotation was computed. [2020-08-18 17:05:56,966 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-08-18 17:05:56,967 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2020-08-18 17:05:56,967 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 30) no Hoare annotation was computed. [2020-08-18 17:05:56,967 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 12 32) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-08-18 17:05:56,967 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-18 17:05:56,967 INFO L268 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-08-18 17:05:56,967 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 21) no Hoare annotation was computed. [2020-08-18 17:05:56,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:05:56 BoogieIcfgContainer [2020-08-18 17:05:56,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:05:56,982 INFO L168 Benchmark]: Toolchain (without parser) took 2099.82 ms. Allocated memory was 140.5 MB in the beginning and 235.4 MB in the end (delta: 94.9 MB). Free memory was 103.8 MB in the beginning and 189.9 MB in the end (delta: -86.1 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:56,983 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-08-18 17:05:56,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.24 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 93.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:56,985 INFO L168 Benchmark]: Boogie Preprocessor took 147.40 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.5 MB in the beginning and 180.3 MB in the end (delta: -86.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:56,986 INFO L168 Benchmark]: RCFGBuilder took 515.12 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 163.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:56,987 INFO L168 Benchmark]: TraceAbstraction took 1151.16 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 163.3 MB in the beginning and 189.9 MB in the end (delta: -26.7 MB). Peak memory consumption was 5.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:56,991 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.24 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 93.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.40 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.5 MB in the beginning and 180.3 MB in the end (delta: -86.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 515.12 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 163.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1151.16 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 163.3 MB in the beginning and 189.9 MB in the end (delta: -26.7 MB). Peak memory consumption was 5.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 30]: 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 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 34 SDslu, 65 SDs, 0 SdLazy, 103 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 47 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 42 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 2837 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...