/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:33:12,422 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 16:33:12,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:33:12,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:33:12,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:33:12,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:33:12,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:33:12,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:33:12,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:33:12,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:33:12,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:33:12,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:33:12,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:33:12,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:33:12,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:33:12,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:33:12,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:33:12,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:33:12,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:33:12,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:33:12,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:33:12,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:33:12,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 16:33:12,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:33:12,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:33:12,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:33:12,526 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 16:33:12,561 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:33:12,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:33:12,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:33:12,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:33:12,564 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:33:12,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:33:12,564 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:33:12,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:33:12,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:33:12,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:33:12,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:33:12,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:33:12,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:33:12,567 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:33:12,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:33:12,567 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:33:12,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:33:12,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:33:12,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:33:12,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:33:12,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:33:12,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:33:12,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:33:12,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:33:12,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:33:12,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:33:12,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:33:12,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:33:12,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:33:12,570 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:33:12,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:33:12,848 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:33:12,853 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:33:12,856 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:33:12,857 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:33:12,858 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-08-21 16:33:12,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd3c0360d/21c0c241026e458987d3fd925ea32534/FLAG1f156c579 [2020-08-21 16:33:13,328 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:33:13,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-08-21 16:33:13,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd3c0360d/21c0c241026e458987d3fd925ea32534/FLAG1f156c579 [2020-08-21 16:33:13,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd3c0360d/21c0c241026e458987d3fd925ea32534 [2020-08-21 16:33:13,725 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:33:13,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:33:13,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:33:13,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:33:13,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:33:13,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:33:13" (1/1) ... [2020-08-21 16:33:13,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8ba199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:13, skipping insertion in model container [2020-08-21 16:33:13,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:33:13" (1/1) ... [2020-08-21 16:33:13,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:33:13,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:33:13,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:33:13,933 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:33:13,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:33:13,961 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:33:13,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:13 WrapperNode [2020-08-21 16:33:13,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:33:13,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:33:13,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:33:13,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:33:14,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:13" (1/1) ... [2020-08-21 16:33:14,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:13" (1/1) ... [2020-08-21 16:33:14,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:13" (1/1) ... [2020-08-21 16:33:14,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:13" (1/1) ... [2020-08-21 16:33:14,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:13" (1/1) ... [2020-08-21 16:33:14,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:13" (1/1) ... [2020-08-21 16:33:14,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:13" (1/1) ... [2020-08-21 16:33:14,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:33:14,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:33:14,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:33:14,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:33:14,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:13" (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 16:33:14,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:33:14,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:33:14,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:33:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:33:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:33:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:33:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:33:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:33:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:33:14,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:33:14,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:33:14,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:33:14,348 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:33:14,348 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 16:33:14,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:33:14 BoogieIcfgContainer [2020-08-21 16:33:14,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:33:14,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:33:14,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:33:14,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:33:14,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:33:13" (1/3) ... [2020-08-21 16:33:14,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3476d1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:33:14, skipping insertion in model container [2020-08-21 16:33:14,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:33:13" (2/3) ... [2020-08-21 16:33:14,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3476d1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:33:14, skipping insertion in model container [2020-08-21 16:33:14,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:33:14" (3/3) ... [2020-08-21 16:33:14,363 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-08-21 16:33:14,377 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:33:14,386 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:33:14,401 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:33:14,426 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:33:14,426 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:33:14,426 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:33:14,426 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:33:14,427 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:33:14,427 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:33:14,427 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:33:14,427 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:33:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-21 16:33:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 16:33:14,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:14,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:33:14,453 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-08-21 16:33:14,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:14,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852311188] [2020-08-21 16:33:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:14,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:14,713 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 16:33:14,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852311188] [2020-08-21 16:33:14,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:33:14,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:33:14,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448916155] [2020-08-21 16:33:14,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:33:14,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:14,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:33:14,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:33:14,736 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-08-21 16:33:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:14,833 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-08-21 16:33:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:33:14,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 16:33:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:14,844 INFO L225 Difference]: With dead ends: 34 [2020-08-21 16:33:14,844 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 16:33:14,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:33:14,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 16:33:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2020-08-21 16:33:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-21 16:33:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-21 16:33:14,881 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-08-21 16:33:14,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:14,882 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-21 16:33:14,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:33:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-21 16:33:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 16:33:14,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:14,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:33:14,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:33:14,884 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:14,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:14,884 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-08-21 16:33:14,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:14,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369854986] [2020-08-21 16:33:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:14,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:33:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:33:14,989 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 16:33:14,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369854986] [2020-08-21 16:33:14,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:33:14,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 16:33:14,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697422158] [2020-08-21 16:33:14,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:33:14,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:33:14,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:33:14,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:33:14,993 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-08-21 16:33:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:33:15,079 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-08-21 16:33:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:33:15,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-21 16:33:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:33:15,080 INFO L225 Difference]: With dead ends: 22 [2020-08-21 16:33:15,080 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 16:33:15,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:33:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 16:33:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 16:33:15,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 16:33:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-08-21 16:33:15,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-08-21 16:33:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:33:15,086 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-08-21 16:33:15,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:33:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-08-21 16:33:15,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 16:33:15,087 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:33:15,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:33:15,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:33:15,088 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:33:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:33:15,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-08-21 16:33:15,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:33:15,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183182638] [2020-08-21 16:33:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:33:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:33:15,111 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:33:15,111 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:33:15,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:33:15,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:33:15 BoogieIcfgContainer [2020-08-21 16:33:15,129 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:33:15,131 INFO L168 Benchmark]: Toolchain (without parser) took 1404.37 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 103.2 MB in the beginning and 112.7 MB in the end (delta: -9.5 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:33:15,132 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 16:33:15,133 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.99 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-21 16:33:15,134 INFO L168 Benchmark]: Boogie Preprocessor took 106.37 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 180.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:33:15,135 INFO L168 Benchmark]: RCFGBuilder took 284.07 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 166.3 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:33:15,136 INFO L168 Benchmark]: TraceAbstraction took 774.25 ms. Allocated memory is still 202.9 MB. Free memory was 165.6 MB in the beginning and 112.7 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:33:15,140 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 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.99 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.37 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 180.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 284.07 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 166.3 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 774.25 ms. Allocated memory is still 202.9 MB. Free memory was 165.6 MB in the beginning and 112.7 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] union dummy d1, d2; [L14] int n = __VERIFIER_nondet_int(); [L15] EXPR n ? &d1 : &d2 [L15] union dummy *pd = n ? &d1 : &d2; [L16] d1.a = __VERIFIER_nondet_int() [L17] COND FALSE !(pd == &d1) [L20] pd->b = 0 [L22] pd == &d2 && d1.a != 0 [L22] EXPR d1.a [L22] pd == &d2 && d1.a != 0 [L22] COND TRUE pd == &d2 && d1.a != 0 [L28] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 12 SDslu, 59 SDs, 0 SdLazy, 84 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 948 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 incorrect! Received shutdown request...