./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/test20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6a4fb114da53a764304d986fec12e4f313da2507 ..................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-05 00:58:42,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-05 00:58:42,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-05 00:58:42,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-05 00:58:42,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-05 00:58:42,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-05 00:58:42,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-05 00:58:42,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-05 00:58:42,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-05 00:58:42,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-05 00:58:42,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-05 00:58:42,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-05 00:58:42,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-05 00:58:42,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-05 00:58:42,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-05 00:58:42,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-05 00:58:42,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-05 00:58:42,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-05 00:58:42,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-05 00:58:42,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-05 00:58:42,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-05 00:58:42,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-05 00:58:42,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-05 00:58:42,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-05 00:58:42,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-05 00:58:42,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-05 00:58:42,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-05 00:58:42,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-05 00:58:42,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-05 00:58:42,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-05 00:58:42,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-05 00:58:42,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-05 00:58:42,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-05 00:58:42,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-05 00:58:42,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-05 00:58:42,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-05 00:58:42,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-05 00:58:42,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-05 00:58:42,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-05 00:58:42,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-05 00:58:42,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-05 00:58:42,808 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-05 00:58:42,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-05 00:58:42,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-05 00:58:42,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-05 00:58:42,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-05 00:58:42,842 INFO L138 SettingsManager]: * Use SBE=true [2021-07-05 00:58:42,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-05 00:58:42,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-05 00:58:42,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-05 00:58:42,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-05 00:58:42,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-05 00:58:42,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-05 00:58:42,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-05 00:58:42,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-05 00:58:42,844 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-05 00:58:42,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-05 00:58:42,844 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-05 00:58:42,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-05 00:58:42,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-05 00:58:42,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-05 00:58:42,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-05 00:58:42,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 00:58:42,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-05 00:58:42,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-05 00:58:42,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-05 00:58:42,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-05 00:58:42,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-05 00:58:42,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-05 00:58:42,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-05 00:58:42,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a4fb114da53a764304d986fec12e4f313da2507 [2021-07-05 00:58:43,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-05 00:58:43,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-05 00:58:43,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-05 00:58:43,071 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-05 00:58:43,071 INFO L275 PluginConnector]: CDTParser initialized [2021-07-05 00:58:43,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test20.c [2021-07-05 00:58:43,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72f6582b3/6f5e9dceb2ac439fb1a3ef898a49c4d3/FLAG2c5a8126c [2021-07-05 00:58:43,466 INFO L306 CDTParser]: Found 1 translation units. [2021-07-05 00:58:43,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test20.c [2021-07-05 00:58:43,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72f6582b3/6f5e9dceb2ac439fb1a3ef898a49c4d3/FLAG2c5a8126c [2021-07-05 00:58:43,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72f6582b3/6f5e9dceb2ac439fb1a3ef898a49c4d3 [2021-07-05 00:58:43,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-05 00:58:43,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-05 00:58:43,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-05 00:58:43,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-05 00:58:43,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-05 00:58:43,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad0ec25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43, skipping insertion in model container [2021-07-05 00:58:43,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-05 00:58:43,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-05 00:58:43,632 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test20.c[377,390] [2021-07-05 00:58:43,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 00:58:43,649 INFO L203 MainTranslator]: Completed pre-run [2021-07-05 00:58:43,681 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test20.c[377,390] [2021-07-05 00:58:43,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 00:58:43,711 INFO L208 MainTranslator]: Completed translation [2021-07-05 00:58:43,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43 WrapperNode [2021-07-05 00:58:43,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-05 00:58:43,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-05 00:58:43,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-05 00:58:43,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-05 00:58:43,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-05 00:58:43,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-05 00:58:43,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-05 00:58:43,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-05 00:58:43,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-05 00:58:43,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-05 00:58:43,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-05 00:58:43,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-05 00:58:43,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43" (1/1) ... [2021-07-05 00:58:43,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 00:58:43,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-05 00:58:43,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-05 00:58:43,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-05 00:58:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-05 00:58:43,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-05 00:58:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-05 00:58:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-05 00:58:44,065 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-05 00:58:44,065 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-05 00:58:44,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 12:58:44 BoogieIcfgContainer [2021-07-05 00:58:44,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-05 00:58:44,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-05 00:58:44,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-05 00:58:44,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-05 00:58:44,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.07 12:58:43" (1/3) ... [2021-07-05 00:58:44,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c78c75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 12:58:44, skipping insertion in model container [2021-07-05 00:58:44,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:43" (2/3) ... [2021-07-05 00:58:44,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c78c75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 12:58:44, skipping insertion in model container [2021-07-05 00:58:44,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 12:58:44" (3/3) ... [2021-07-05 00:58:44,075 INFO L111 eAbstractionObserver]: Analyzing ICFG test20.c [2021-07-05 00:58:44,083 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-05 00:58:44,083 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-05 00:58:44,124 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-05 00:58:44,131 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-05 00:58:44,131 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-05 00:58:44,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 00:58:44,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-07-05 00:58:44,146 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 00:58:44,147 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-07-05 00:58:44,147 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 00:58:44,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 00:58:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash 925607, now seen corresponding path program 1 times [2021-07-05 00:58:44,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 00:58:44,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537179115] [2021-07-05 00:58:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 00:58:44,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 00:58:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 00:58:44,293 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 00:58:44,294 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 00:58:44,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 00:58:44,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 00:58:44,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 00:58:44,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 00:58:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 00:58:44,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 00:58:44,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537179115] [2021-07-05 00:58:44,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537179115] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 00:58:44,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 00:58:44,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-05 00:58:44,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393577745] [2021-07-05 00:58:44,332 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-05 00:58:44,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 00:58:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-05 00:58:44,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-05 00:58:44,341 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 00:58:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 00:58:44,359 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2021-07-05 00:58:44,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-05 00:58:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-07-05 00:58:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 00:58:44,364 INFO L225 Difference]: With dead ends: 13 [2021-07-05 00:58:44,364 INFO L226 Difference]: Without dead ends: 0 [2021-07-05 00:58:44,365 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-05 00:58:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-05 00:58:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-05 00:58:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 00:58:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-05 00:58:44,380 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2021-07-05 00:58:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 00:58:44,380 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-05 00:58:44,388 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 00:58:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-05 00:58:44,388 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-05 00:58:44,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-07-05 00:58:44,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 00:58:44,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 00:58:44,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 00:58:44,407 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-07-05 00:58:44,407 INFO L762 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-07-05 00:58:44,408 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-07-05 00:58:44,408 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-07-05 00:58:44,408 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-07-05 00:58:44,409 INFO L758 garLoopResultBuilder]: At program point L20(lines 18 21) the Hoare annotation is: (and (not (= ULTIMATE.start_equal_~a.base ULTIMATE.start_equal_~b.base)) (not (= |~#b~0.base| |~#a~0.base|))) [2021-07-05 00:58:44,409 INFO L758 garLoopResultBuilder]: At program point L13(lines 6 14) the Hoare annotation is: (and (not (= ULTIMATE.start_equal_~a.base ULTIMATE.start_equal_~b.base)) (not (= |~#b~0.base| |~#a~0.base|))) [2021-07-05 00:58:44,410 INFO L758 garLoopResultBuilder]: At program point L8(lines 6 14) the Hoare annotation is: false [2021-07-05 00:58:44,410 INFO L762 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-07-05 00:58:44,410 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-05 00:58:44,411 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-05 00:58:44,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.07 12:58:44 BoogieIcfgContainer [2021-07-05 00:58:44,436 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-05 00:58:44,437 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-05 00:58:44,437 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-05 00:58:44,437 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-05 00:58:44,437 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 12:58:44" (3/4) ... [2021-07-05 00:58:44,445 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-07-05 00:58:44,454 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-07-05 00:58:44,465 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-07-05 00:58:44,465 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-05 00:58:44,465 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-05 00:58:44,503 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-05 00:58:44,504 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-05 00:58:44,505 INFO L168 Benchmark]: Toolchain (without parser) took 1014.34 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 35.0 MB in the beginning and 48.2 MB in the end (delta: -13.3 MB). Peak memory consumption was 422.6 kB. Max. memory is 16.1 GB. [2021-07-05 00:58:44,505 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 56.6 MB. Free memory is still 37.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 00:58:44,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.62 ms. Allocated memory is still 56.6 MB. Free memory was 34.8 MB in the beginning and 40.5 MB in the end (delta: -5.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-07-05 00:58:44,506 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.29 ms. Allocated memory is still 56.6 MB. Free memory was 40.5 MB in the beginning and 39.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 00:58:44,506 INFO L168 Benchmark]: Boogie Preprocessor took 10.89 ms. Allocated memory is still 56.6 MB. Free memory was 39.1 MB in the beginning and 38.2 MB in the end (delta: 969.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 00:58:44,506 INFO L168 Benchmark]: RCFGBuilder took 322.06 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 38.2 MB in the beginning and 54.5 MB in the end (delta: -16.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2021-07-05 00:58:44,507 INFO L168 Benchmark]: TraceAbstraction took 366.95 ms. Allocated memory is still 71.3 MB. Free memory was 54.3 MB in the beginning and 50.5 MB in the end (delta: 3.8 MB). Peak memory consumption was 582.2 kB. Max. memory is 16.1 GB. [2021-07-05 00:58:44,507 INFO L168 Benchmark]: Witness Printer took 66.92 ms. Allocated memory is still 71.3 MB. Free memory was 50.5 MB in the beginning and 48.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-07-05 00:58:44,518 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 56.6 MB. Free memory is still 37.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 219.62 ms. Allocated memory is still 56.6 MB. Free memory was 34.8 MB in the beginning and 40.5 MB in the end (delta: -5.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 20.29 ms. Allocated memory is still 56.6 MB. Free memory was 40.5 MB in the beginning and 39.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 10.89 ms. Allocated memory is still 56.6 MB. Free memory was 39.1 MB in the beginning and 38.2 MB in the end (delta: 969.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 322.06 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 38.2 MB in the beginning and 54.5 MB in the end (delta: -16.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 366.95 ms. Allocated memory is still 71.3 MB. Free memory was 54.3 MB in the beginning and 50.5 MB in the end (delta: 3.8 MB). Peak memory consumption was 582.2 kB. Max. memory is 16.1 GB. * Witness Printer took 66.92 ms. Allocated memory is still 71.3 MB. Free memory was 50.5 MB in the beginning and 48.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 304.9ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 6.2ms, AutomataDifference: 32.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 16.1ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 9 SDslu, 1 SDs, 0 SdLazy, 2 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 5 NumberOfFragments, 19 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 4.1ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 7.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 6.8ms SsaConstructionTime, 27.2ms SatisfiabilityAnalysisTime, 89.0ms InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 9 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: !(a == b) && !(b == a) - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: !(a == b) && !(b == a) RESULT: Ultimate proved your program to be correct! [2021-07-05 00:58:44,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...