./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/alt_test.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/alt_test.i -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 6bafd9f9c248bc8b929fd553117dceb5cafdbf12cfc108f50311933c849ac186 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 14:59:03,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 14:59:03,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 14:59:03,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 14:59:03,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 14:59:03,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 14:59:03,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 14:59:03,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 14:59:03,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 14:59:03,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 14:59:03,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 14:59:03,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 14:59:03,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 14:59:03,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 14:59:03,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 14:59:03,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 14:59:03,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 14:59:03,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 14:59:03,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 14:59:03,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 14:59:03,473 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 14:59:03,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 14:59:03,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 14:59:03,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 14:59:03,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 14:59:03,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 14:59:03,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 14:59:03,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 14:59:03,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 14:59:03,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 14:59:03,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 14:59:03,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 14:59:03,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 14:59:03,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 14:59:03,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 14:59:03,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 14:59:03,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 14:59:03,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 14:59:03,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 14:59:03,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 14:59:03,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 14:59:03,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 14:59:03,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 14:59:03,528 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 14:59:03,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 14:59:03,528 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 14:59:03,529 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 14:59:03,529 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 14:59:03,529 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 14:59:03,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 14:59:03,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 14:59:03,530 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 14:59:03,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 14:59:03,531 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 14:59:03,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 14:59:03,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 14:59:03,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 14:59:03,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 14:59:03,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 14:59:03,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 14:59:03,532 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 14:59:03,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 14:59:03,533 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 14:59:03,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 14:59:03,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 14:59:03,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 14:59:03,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 14:59:03,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 14:59:03,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 14:59:03,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 14:59:03,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 14:59:03,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 14:59:03,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 14:59:03,535 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 14:59:03,535 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 14:59:03,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 14:59:03,535 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bafd9f9c248bc8b929fd553117dceb5cafdbf12cfc108f50311933c849ac186 [2022-07-13 14:59:03,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 14:59:03,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 14:59:03,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 14:59:03,760 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 14:59:03,761 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 14:59:03,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/alt_test.i [2022-07-13 14:59:03,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d9ccb09c/45c7296bbb0341a4889af3200fbc164c/FLAG891e26a55 [2022-07-13 14:59:04,260 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 14:59:04,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/alt_test.i [2022-07-13 14:59:04,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d9ccb09c/45c7296bbb0341a4889af3200fbc164c/FLAG891e26a55 [2022-07-13 14:59:04,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d9ccb09c/45c7296bbb0341a4889af3200fbc164c [2022-07-13 14:59:04,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 14:59:04,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 14:59:04,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 14:59:04,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 14:59:04,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 14:59:04,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:04,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d189068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04, skipping insertion in model container [2022-07-13 14:59:04,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:04,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 14:59:04,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 14:59:04,785 WARN L230 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/alt_test.i[22285,22298] [2022-07-13 14:59:04,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 14:59:04,854 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 14:59:04,888 WARN L230 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/alt_test.i[22285,22298] [2022-07-13 14:59:04,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 14:59:04,913 INFO L208 MainTranslator]: Completed translation [2022-07-13 14:59:04,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04 WrapperNode [2022-07-13 14:59:04,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 14:59:04,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 14:59:04,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 14:59:04,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 14:59:04,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:04,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:04,977 INFO L137 Inliner]: procedures = 121, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 37 [2022-07-13 14:59:04,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 14:59:04,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 14:59:04,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 14:59:04,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 14:59:04,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:04,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:04,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:04,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:04,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:04,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:04,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:04,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 14:59:04,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 14:59:04,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 14:59:04,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 14:59:04,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04" (1/1) ... [2022-07-13 14:59:05,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 14:59:05,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 14:59:05,026 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) [2022-07-13 14:59:05,028 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 [2022-07-13 14:59:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 14:59:05,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 14:59:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 14:59:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure l_free [2022-07-13 14:59:05,049 INFO L138 BoogieDeclarations]: Found implementation of procedure l_free [2022-07-13 14:59:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 14:59:05,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 14:59:05,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 14:59:05,101 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 14:59:05,102 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 14:59:05,231 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 14:59:05,235 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 14:59:05,235 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 14:59:05,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 02:59:05 BoogieIcfgContainer [2022-07-13 14:59:05,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 14:59:05,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 14:59:05,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 14:59:05,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 14:59:05,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 02:59:04" (1/3) ... [2022-07-13 14:59:05,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cec31ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 02:59:05, skipping insertion in model container [2022-07-13 14:59:05,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:59:04" (2/3) ... [2022-07-13 14:59:05,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cec31ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 02:59:05, skipping insertion in model container [2022-07-13 14:59:05,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 02:59:05" (3/3) ... [2022-07-13 14:59:05,242 INFO L111 eAbstractionObserver]: Analyzing ICFG alt_test.i [2022-07-13 14:59:05,250 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 14:59:05,263 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 14:59:05,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 14:59:05,332 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7b11db7c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a9f8b20 [2022-07-13 14:59:05,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 14:59:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 14:59:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 14:59:05,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 14:59:05,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 14:59:05,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 14:59:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 14:59:05,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1030557677, now seen corresponding path program 1 times [2022-07-13 14:59:05,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 14:59:05,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966617130] [2022-07-13 14:59:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 14:59:05,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 14:59:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:59:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 14:59:05,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 14:59:05,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966617130] [2022-07-13 14:59:05,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966617130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 14:59:05,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 14:59:05,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 14:59:05,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696937716] [2022-07-13 14:59:05,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 14:59:05,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 14:59:05,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 14:59:05,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 14:59:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 14:59:05,586 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 14:59:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 14:59:05,615 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-07-13 14:59:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 14:59:05,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 14:59:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 14:59:05,627 INFO L225 Difference]: With dead ends: 40 [2022-07-13 14:59:05,627 INFO L226 Difference]: Without dead ends: 22 [2022-07-13 14:59:05,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 14:59:05,634 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 14:59:05,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 38 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 14:59:05,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-13 14:59:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-07-13 14:59:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 14:59:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-13 14:59:05,668 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2022-07-13 14:59:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 14:59:05,669 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-13 14:59:05,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 14:59:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-13 14:59:05,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 14:59:05,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 14:59:05,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 14:59:05,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 14:59:05,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 14:59:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 14:59:05,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1839904303, now seen corresponding path program 1 times [2022-07-13 14:59:05,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 14:59:05,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277602777] [2022-07-13 14:59:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 14:59:05,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 14:59:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:59:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 14:59:05,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 14:59:05,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277602777] [2022-07-13 14:59:05,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277602777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 14:59:05,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 14:59:05,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 14:59:05,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714805216] [2022-07-13 14:59:05,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 14:59:05,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 14:59:05,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 14:59:05,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 14:59:05,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 14:59:05,722 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 14:59:05,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 14:59:05,732 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-07-13 14:59:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 14:59:05,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 14:59:05,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 14:59:05,737 INFO L225 Difference]: With dead ends: 30 [2022-07-13 14:59:05,738 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 14:59:05,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 14:59:05,740 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 14:59:05,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 25 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 14:59:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 14:59:05,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-13 14:59:05,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 14:59:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-07-13 14:59:05,746 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2022-07-13 14:59:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 14:59:05,746 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-07-13 14:59:05,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 14:59:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-07-13 14:59:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 14:59:05,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 14:59:05,747 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 14:59:05,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 14:59:05,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 14:59:05,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 14:59:05,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1999403131, now seen corresponding path program 1 times [2022-07-13 14:59:05,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 14:59:05,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859453032] [2022-07-13 14:59:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 14:59:05,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 14:59:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:59:05,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 14:59:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 14:59:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 14:59:05,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 14:59:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859453032] [2022-07-13 14:59:05,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859453032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 14:59:05,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 14:59:05,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 14:59:05,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946259204] [2022-07-13 14:59:05,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 14:59:05,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 14:59:05,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 14:59:05,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 14:59:05,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 14:59:05,815 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 14:59:05,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 14:59:05,889 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-07-13 14:59:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 14:59:05,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-13 14:59:05,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 14:59:05,890 INFO L225 Difference]: With dead ends: 30 [2022-07-13 14:59:05,890 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 14:59:05,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-13 14:59:05,891 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 14:59:05,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 14:59:05,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 14:59:05,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-13 14:59:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 14:59:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-07-13 14:59:05,895 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-07-13 14:59:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 14:59:05,895 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-07-13 14:59:05,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 14:59:05,895 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-07-13 14:59:05,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 14:59:05,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 14:59:05,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 14:59:05,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 14:59:05,896 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 14:59:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 14:59:05,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1387459588, now seen corresponding path program 1 times [2022-07-13 14:59:05,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 14:59:05,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722686695] [2022-07-13 14:59:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 14:59:05,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 14:59:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 14:59:05,909 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 14:59:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 14:59:05,930 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 14:59:05,930 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 14:59:05,931 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 14:59:05,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 14:59:05,935 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 14:59:05,937 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 14:59:05,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 02:59:05 BoogieIcfgContainer [2022-07-13 14:59:05,960 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 14:59:05,960 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 14:59:05,960 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 14:59:05,960 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 14:59:05,961 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 02:59:05" (3/4) ... [2022-07-13 14:59:05,962 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-13 14:59:05,985 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 14:59:05,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 14:59:05,986 INFO L158 Benchmark]: Toolchain (without parser) took 1388.56ms. Allocated memory is still 88.1MB. Free memory was 44.2MB in the beginning and 34.6MB in the end (delta: 9.6MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2022-07-13 14:59:05,986 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory is still 62.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 14:59:05,986 INFO L158 Benchmark]: CACSL2BoogieTranslator took 315.39ms. Allocated memory is still 88.1MB. Free memory was 44.0MB in the beginning and 61.7MB in the end (delta: -17.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-13 14:59:05,987 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.79ms. Allocated memory is still 88.1MB. Free memory was 61.5MB in the beginning and 59.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 14:59:05,987 INFO L158 Benchmark]: Boogie Preprocessor took 11.09ms. Allocated memory is still 88.1MB. Free memory was 59.9MB in the beginning and 58.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 14:59:05,987 INFO L158 Benchmark]: RCFGBuilder took 247.28ms. Allocated memory is still 88.1MB. Free memory was 58.6MB in the beginning and 49.0MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 14:59:05,987 INFO L158 Benchmark]: TraceAbstraction took 722.16ms. Allocated memory is still 88.1MB. Free memory was 48.6MB in the beginning and 37.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2022-07-13 14:59:05,988 INFO L158 Benchmark]: Witness Printer took 25.45ms. Allocated memory is still 88.1MB. Free memory was 36.7MB in the beginning and 34.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 14:59:05,989 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory is still 62.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 315.39ms. Allocated memory is still 88.1MB. Free memory was 44.0MB in the beginning and 61.7MB in the end (delta: -17.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.79ms. Allocated memory is still 88.1MB. Free memory was 61.5MB in the beginning and 59.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 11.09ms. Allocated memory is still 88.1MB. Free memory was 59.9MB in the beginning and 58.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 247.28ms. Allocated memory is still 88.1MB. Free memory was 58.6MB in the beginning and 49.0MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 722.16ms. Allocated memory is still 88.1MB. Free memory was 48.6MB in the beginning and 37.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * Witness Printer took 25.45ms. Allocated memory is still 88.1MB. Free memory was 36.7MB in the beginning and 34.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 516]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L518] int globalState = 0; VAL [globalState=0] [L523] CALL, EXPR l_malloc(sizeof(int)) [L529] void *retVal = malloc(size); [L530] COND TRUE retVal != ((void *)0) [L531] globalState=1 VAL [\old(size)=4, globalState=1, retVal={-1:0}, size=4] [L532] return retVal; VAL [\old(size)=4, \result={-1:0}, globalState=1, retVal={-1:0}, size=4] [L523] RET, EXPR l_malloc(sizeof(int)) [L523] int *a = (int*) l_malloc(sizeof(int)); [L524] CALL l_free(a) VAL [\old(globalState)=1, globalState=1] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=1, globalState=1, ptr={-1:0}, ptr={-1:0}] [L535] (globalState == 1) ? (0) : __blast_assert () VAL [\old(globalState)=1, globalState=1, ptr={-1:0}, ptr={-1:0}] [L536] globalState = 0 [L524] RET l_free(a) VAL [\old(argc)=50, a={-1:0}, argc=50, argv={49:51}, argv={49:51}, globalState=0] [L525] CALL l_free(a) VAL [\old(globalState)=0, globalState=0] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=0, globalState=0, ptr={-1:0}, ptr={-1:0}] [L535] (globalState == 1) ? (0) : __blast_assert () [L535] CALL __blast_assert () [L516] reach_error() VAL [\old(globalState)=0, globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 89 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 47 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 65 IncrementalHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 42 mSDtfsCounter, 65 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=1, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 74 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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! [2022-07-13 14:59:06,023 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE