/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:21:11,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:21:11,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:21:11,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:21:11,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:21:11,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:21:11,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:21:11,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:21:11,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:21:11,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:21:11,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:21:11,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:21:11,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:21:11,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:21:11,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:21:11,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:21:11,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:21:11,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:21:11,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:21:11,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:21:11,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:21:11,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:21:11,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:21:11,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:21:11,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:21:11,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:21:11,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:21:11,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:21:11,810 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 [2020-09-21 10:21:11,837 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:21:11,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:21:11,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:21:11,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:21:11,839 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:21:11,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:21:11,839 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:21:11,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:21:11,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:21:11,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:21:11,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:21:11,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:21:11,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:21:11,841 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:21:11,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:21:11,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:21:11,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:21:11,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:21:11,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:21:11,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:21:11,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:21:11,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:21:11,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:21:11,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:21:11,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:21:11,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:21:11,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:21:11,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:21:11,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:21:11,844 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 -> false [2020-09-21 10:21:12,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:21:12,341 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:21:12,345 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:21:12,347 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:21:12,348 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:21:12,349 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-09-21 10:21:12,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba5c85cfc/06879838a1c1400c900783d76c5d1282/FLAGcc19f06eb [2020-09-21 10:21:13,007 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:21:13,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test06.c [2020-09-21 10:21:13,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba5c85cfc/06879838a1c1400c900783d76c5d1282/FLAGcc19f06eb [2020-09-21 10:21:13,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba5c85cfc/06879838a1c1400c900783d76c5d1282 [2020-09-21 10:21:13,345 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:21:13,351 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:21:13,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:13,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:21:13,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:21:13,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:13" (1/1) ... [2020-09-21 10:21:13,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a73c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:13, skipping insertion in model container [2020-09-21 10:21:13,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:13" (1/1) ... [2020-09-21 10:21:13,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:21:13,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:21:13,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:13,641 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:21:13,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:13,680 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:21:13,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:13 WrapperNode [2020-09-21 10:21:13,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:13,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:21:13,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:21:13,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:21:13,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:13" (1/1) ... [2020-09-21 10:21:13,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:13" (1/1) ... [2020-09-21 10:21:13,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:13" (1/1) ... [2020-09-21 10:21:13,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:13" (1/1) ... [2020-09-21 10:21:13,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:13" (1/1) ... [2020-09-21 10:21:13,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:13" (1/1) ... [2020-09-21 10:21:13,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:13" (1/1) ... [2020-09-21 10:21:13,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:21:13,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:21:13,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:21:13,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:21:13,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:13" (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 [2020-09-21 10:21:13,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:21:13,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:21:13,889 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-09-21 10:21:13,890 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-09-21 10:21:13,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:21:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:21:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-09-21 10:21:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:21:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:21:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:21:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-09-21 10:21:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:21:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:21:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:21:13,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:21:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:21:13,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:21:14,266 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:21:14,267 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:21:14,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:14 BoogieIcfgContainer [2020-09-21 10:21:14,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:21:14,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:21:14,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:21:14,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:21:14,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:21:13" (1/3) ... [2020-09-21 10:21:14,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3fd7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:14, skipping insertion in model container [2020-09-21 10:21:14,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:13" (2/3) ... [2020-09-21 10:21:14,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3fd7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:14, skipping insertion in model container [2020-09-21 10:21:14,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:14" (3/3) ... [2020-09-21 10:21:14,281 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2020-09-21 10:21:14,292 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:21:14,300 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:21:14,323 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:21:14,356 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:21:14,356 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:21:14,356 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:21:14,357 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:21:14,357 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:21:14,357 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:21:14,357 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:21:14,357 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:21:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-21 10:21:14,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:21:14,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:14,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:14,393 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1199829752, now seen corresponding path program 1 times [2020-09-21 10:21:14,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:14,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507360052] [2020-09-21 10:21:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:21:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:14,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507360052] [2020-09-21 10:21:14,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:14,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:21:14,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563083059] [2020-09-21 10:21:14,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:21:14,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:14,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:21:14,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:21:14,830 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-09-21 10:21:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:15,149 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-21 10:21:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:21:15,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-09-21 10:21:15,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:15,165 INFO L225 Difference]: With dead ends: 34 [2020-09-21 10:21:15,166 INFO L226 Difference]: Without dead ends: 20 [2020-09-21 10:21:15,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:21:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-21 10:21:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-21 10:21:15,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 10:21:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2020-09-21 10:21:15,223 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 14 [2020-09-21 10:21:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:15,223 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2020-09-21 10:21:15,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:21:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2020-09-21 10:21:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:21:15,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:15,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:15,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:21:15,225 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:15,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:15,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2114164890, now seen corresponding path program 1 times [2020-09-21 10:21:15,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:15,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192442587] [2020-09-21 10:21:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:21:15,417 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:21:15,418 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:21:15,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:21:15,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:21:15 BoogieIcfgContainer [2020-09-21 10:21:15,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:21:15,450 INFO L168 Benchmark]: Toolchain (without parser) took 2101.43 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 103.8 MB in the beginning and 103.0 MB in the end (delta: 794.1 kB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:15,451 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-21 10:21:15,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.58 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:15,453 INFO L168 Benchmark]: Boogie Preprocessor took 130.23 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.2 MB in the beginning and 181.0 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:15,454 INFO L168 Benchmark]: RCFGBuilder took 459.09 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 161.3 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:15,455 INFO L168 Benchmark]: TraceAbstraction took 1173.15 ms. Allocated memory is still 202.9 MB. Free memory was 160.6 MB in the beginning and 103.0 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:15,459 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 329.58 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.23 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.2 MB in the beginning and 181.0 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 459.09 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 161.3 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1173.15 ms. Allocated memory is still 202.9 MB. Free memory was 160.6 MB in the beginning and 103.0 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 40]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int a, b; [L22] int *p1, *p2; [L24] p1 = &a [L25] p2 = &b [L27] b = 1 [L28] a = 5 [L30] EXPR \read(a) [L30] a-- [L32] EXPR \read(a) [L32] CALL, EXPR f(a, &p1, &p2) [L12] COND TRUE a == 4 [L13] CALL g(p1, p2) [L5] EXPR \read(**p2) [L5] int *pq = *p2; [L7] EXPR \read(**p2) [L7] *p1 = *p2 [L8] *pq = 0 [L13] RET g(p1, p2) [L14] return 1; [L32] RET, EXPR f(a, &p1, &p2) [L32] a = f(a, &p1, &p2) [L34] EXPR \read(*p1) [L34] COND TRUE *p1 == 0 [L40] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 17 SDslu, 42 SDs, 0 SdLazy, 55 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 533 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 incorrect! Received shutdown request...