/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 03:32:34,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 03:32:34,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 03:32:34,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 03:32:34,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 03:32:34,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 03:32:34,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 03:32:34,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 03:32:34,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 03:32:34,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 03:32:34,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 03:32:34,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 03:32:34,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:32:34,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:32:34,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:32:34,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:32:34,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:32:34,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:32:34,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:32:34,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:32:34,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:32:34,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:32:34,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:32:34,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:32:34,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 03:32:34,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 03:32:34,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 03:32:34,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 03:32:34,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 03:32:34,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 03:32:34,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:32:34,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:32:34,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:32:34,427 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 [2020-08-19 03:32:34,468 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:32:34,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:32:34,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:32:34,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:32:34,471 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:32:34,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:32:34,472 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:32:34,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:32:34,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:32:34,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:32:34,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:32:34,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:32:34,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:32:34,475 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:32:34,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:32:34,475 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:32:34,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:32:34,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:32:34,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:32:34,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:32:34,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:32:34,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:32:34,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:32:34,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:32:34,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:32:34,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:32:34,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:32:34,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:32:34,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:32:34,478 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=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:32:34,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:32:34,854 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:32:34,858 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:32:34,860 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:32:34,860 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:32:34,861 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c [2020-08-19 03:32:34,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d4e74f21/82761ff4d48148718dcf47737a9ff9d5/FLAG3bca47cd6 [2020-08-19 03:32:35,474 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:32:35,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c [2020-08-19 03:32:35,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d4e74f21/82761ff4d48148718dcf47737a9ff9d5/FLAG3bca47cd6 [2020-08-19 03:32:35,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d4e74f21/82761ff4d48148718dcf47737a9ff9d5 [2020-08-19 03:32:35,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:32:35,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:32:35,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:32:35,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:32:35,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:32:35,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:32:35" (1/1) ... [2020-08-19 03:32:35,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1848833b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:35, skipping insertion in model container [2020-08-19 03:32:35,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:32:35" (1/1) ... [2020-08-19 03:32:35,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:32:35,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:32:36,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:32:36,080 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:32:36,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:32:36,108 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:32:36,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:36 WrapperNode [2020-08-19 03:32:36,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:32:36,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:32:36,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:32:36,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:32:36,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:36" (1/1) ... [2020-08-19 03:32:36,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:36" (1/1) ... [2020-08-19 03:32:36,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:36" (1/1) ... [2020-08-19 03:32:36,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:36" (1/1) ... [2020-08-19 03:32:36,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:36" (1/1) ... [2020-08-19 03:32:36,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:36" (1/1) ... [2020-08-19 03:32:36,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:36" (1/1) ... [2020-08-19 03:32:36,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:32:36,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:32:36,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:32:36,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:32:36,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:36" (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 [2020-08-19 03:32:36,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:32:36,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:32:36,280 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-19 03:32:36,280 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2020-08-19 03:32:36,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:32:36,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:32:36,281 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-19 03:32:36,281 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2020-08-19 03:32:36,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:32:36,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:32:36,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:32:36,452 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:32:36,452 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 03:32:36,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:32:36 BoogieIcfgContainer [2020-08-19 03:32:36,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:32:36,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:32:36,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:32:36,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:32:36,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:32:35" (1/3) ... [2020-08-19 03:32:36,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f31db8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:32:36, skipping insertion in model container [2020-08-19 03:32:36,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:36" (2/3) ... [2020-08-19 03:32:36,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f31db8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:32:36, skipping insertion in model container [2020-08-19 03:32:36,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:32:36" (3/3) ... [2020-08-19 03:32:36,464 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-2.c [2020-08-19 03:32:36,475 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:32:36,482 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-19 03:32:36,497 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-19 03:32:36,519 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:32:36,519 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:32:36,520 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:32:36,520 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:32:36,520 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:32:36,520 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:32:36,520 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:32:36,520 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:32:36,536 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-08-19 03:32:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 03:32:36,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:36,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:36,543 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:36,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1662209305, now seen corresponding path program 1 times [2020-08-19 03:32:36,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:36,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634536504] [2020-08-19 03:32:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:32:36,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634536504] [2020-08-19 03:32:36,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:32:36,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 03:32:36,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370276447] [2020-08-19 03:32:36,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 03:32:36,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:36,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 03:32:36,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:32:36,893 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2020-08-19 03:32:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:36,957 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-19 03:32:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 03:32:36,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-08-19 03:32:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:36,969 INFO L225 Difference]: With dead ends: 31 [2020-08-19 03:32:36,969 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 03:32:36,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:32:36,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 03:32:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 03:32:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 03:32:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 03:32:36,998 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-08-19 03:32:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:36,998 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 03:32:36,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 03:32:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 03:32:36,999 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 03:32:36,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:32:37,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 03:32:37,044 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 03:32:37,044 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 03:32:37,044 INFO L268 CegarLoopResult]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2020-08-19 03:32:37,045 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-08-19 03:32:37,045 INFO L268 CegarLoopResult]: For program point L9-1(lines 6 11) no Hoare annotation was computed. [2020-08-19 03:32:37,045 INFO L268 CegarLoopResult]: For program point fEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-19 03:32:37,045 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-08-19 03:32:37,046 INFO L271 CegarLoopResult]: At program point fENTRY(lines 6 11) the Hoare annotation is: true [2020-08-19 03:32:37,046 INFO L268 CegarLoopResult]: For program point fFINAL(lines 6 11) no Hoare annotation was computed. [2020-08-19 03:32:37,046 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 03:32:37,046 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 03:32:37,046 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 03:32:37,047 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 03:32:37,047 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 20 22) the Hoare annotation is: true [2020-08-19 03:32:37,047 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 20 22) no Hoare annotation was computed. [2020-08-19 03:32:37,047 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 20 22) no Hoare annotation was computed. [2020-08-19 03:32:37,048 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-19 03:32:37,048 INFO L268 CegarLoopResult]: For program point f2EXIT(lines 13 18) no Hoare annotation was computed. [2020-08-19 03:32:37,048 INFO L268 CegarLoopResult]: For program point L16-1(lines 13 18) no Hoare annotation was computed. [2020-08-19 03:32:37,048 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-08-19 03:32:37,048 INFO L271 CegarLoopResult]: At program point f2ENTRY(lines 13 18) the Hoare annotation is: true [2020-08-19 03:32:37,049 INFO L268 CegarLoopResult]: For program point f2FINAL(lines 13 18) no Hoare annotation was computed. [2020-08-19 03:32:37,049 INFO L268 CegarLoopResult]: For program point f2Err0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2020-08-19 03:32:37,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 03:32:37 BoogieIcfgContainer [2020-08-19 03:32:37,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 03:32:37,059 INFO L168 Benchmark]: Toolchain (without parser) took 1197.45 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 104.9 MB in the beginning and 146.8 MB in the end (delta: -41.8 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-08-19 03:32:37,060 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 143.1 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 03:32:37,061 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.68 ms. Allocated memory is still 143.1 MB. Free memory was 104.7 MB in the beginning and 95.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-08-19 03:32:37,062 INFO L168 Benchmark]: Boogie Preprocessor took 24.47 ms. Allocated memory is still 143.1 MB. Free memory was 95.7 MB in the beginning and 94.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-19 03:32:37,063 INFO L168 Benchmark]: RCFGBuilder took 321.76 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 94.4 MB in the beginning and 172.9 MB in the end (delta: -78.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-19 03:32:37,064 INFO L168 Benchmark]: TraceAbstraction took 598.67 ms. Allocated memory is still 205.0 MB. Free memory was 172.3 MB in the beginning and 146.8 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-08-19 03:32:37,069 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 143.1 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.68 ms. Allocated memory is still 143.1 MB. Free memory was 104.7 MB in the beginning and 95.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.47 ms. Allocated memory is still 143.1 MB. Free memory was 95.7 MB in the beginning and 94.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.76 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 94.4 MB in the beginning and 172.9 MB in the end (delta: -78.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 598.67 ms. Allocated memory is still 205.0 MB. Free memory was 172.3 MB in the beginning and 146.8 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 5 SDslu, 15 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 10 PreInvPairs, 10 NumberOfFragments, 11 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...