./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2018/Problem16.c --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/eca-rers2018/Problem16.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 109d79acc9f0ebf30672589a81cb76b857da77dbea7f7c16d3f17b5b5da23748 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:36:50,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:36:50,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:36:50,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:36:50,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:36:50,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:36:50,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:36:50,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:36:50,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:36:50,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:36:50,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:36:50,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:36:50,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:36:50,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:36:50,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:36:50,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:36:50,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:36:50,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:36:50,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:36:50,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:36:50,082 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:36:50,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:36:50,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:36:50,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:36:50,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:36:50,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:36:50,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:36:50,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:36:50,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:36:50,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:36:50,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:36:50,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:36:50,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:36:50,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:36:50,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:36:50,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:36:50,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:36:50,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:36:50,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:36:50,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:36:50,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:36:50,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:36:50,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:36:50,128 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:36:50,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:36:50,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:36:50,130 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:36:50,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:36:50,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:36:50,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:36:50,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:36:50,139 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:36:50,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:36:50,139 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:36:50,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:36:50,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:36:50,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:36:50,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:36:50,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:36:50,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:36:50,140 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:36:50,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:36:50,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:36:50,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:36:50,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:36:50,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:36:50,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:36:50,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:36:50,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:36:50,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:36:50,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:36:50,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:36:50,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:36:50,143 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:36:50,143 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:36:50,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:36:50,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 109d79acc9f0ebf30672589a81cb76b857da77dbea7f7c16d3f17b5b5da23748 [2022-07-13 13:36:50,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:36:50,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:36:50,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:36:50,355 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:36:50,355 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:36:50,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2018/Problem16.c [2022-07-13 13:36:50,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/881179e37/7853090d3ba84e13894bfb99b5844038/FLAGb73f8b567 [2022-07-13 13:36:53,326 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:36:53,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem16.c [2022-07-13 13:36:53,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/881179e37/7853090d3ba84e13894bfb99b5844038/FLAGb73f8b567 [2022-07-13 13:36:53,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/881179e37/7853090d3ba84e13894bfb99b5844038 [2022-07-13 13:36:53,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:36:53,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:36:53,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:36:53,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:36:53,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:36:53,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:36:53" (1/1) ... [2022-07-13 13:36:53,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@546f89e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:36:53, skipping insertion in model container [2022-07-13 13:36:53,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:36:53" (1/1) ... [2022-07-13 13:36:53,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:36:55,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:36:56,096 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/eca-rers2018/Problem16.c[778,791] [2022-07-13 13:36:56,183 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/eca-rers2018/Problem16.c[817,830] [2022-07-13 13:38:55,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:38:55,101 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:38:55,109 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/eca-rers2018/Problem16.c[778,791] [2022-07-13 13:38:55,109 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/eca-rers2018/Problem16.c[817,830] [2022-07-13 13:38:59,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:39:02,023 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:39:02,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02 WrapperNode [2022-07-13 13:39:02,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:39:02,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:39:02,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:39:02,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:39:02,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02" (1/1) ... [2022-07-13 13:39:03,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02" (1/1) ... [2022-07-13 13:39:07,053 INFO L137 Inliner]: procedures = 1385, calls = 1376, calls flagged for inlining = 1272, calls inlined = 1272, statements flattened = 632995 [2022-07-13 13:39:07,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:39:07,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:39:07,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:39:07,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:39:07,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02" (1/1) ... [2022-07-13 13:39:07,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02" (1/1) ... [2022-07-13 13:39:07,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02" (1/1) ... [2022-07-13 13:39:07,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02" (1/1) ... [2022-07-13 13:39:09,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02" (1/1) ... [2022-07-13 13:39:10,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02" (1/1) ... [2022-07-13 13:39:10,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02" (1/1) ... [2022-07-13 13:39:11,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:39:11,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:39:11,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:39:11,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:39:11,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02" (1/1) ... [2022-07-13 13:39:11,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:39:11,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:39:11,699 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 13:39:11,700 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 13:39:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:39:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:39:11,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:39:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-07-13 13:39:11,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-07-13 13:39:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-07-13 13:39:11,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-07-13 13:39:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:39:12,278 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:39:12,279 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:40:19,785 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:40:19,829 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:40:19,829 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:40:19,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:40:19 BoogieIcfgContainer [2022-07-13 13:40:19,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:40:19,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:40:19,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:40:19,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:40:19,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:36:53" (1/3) ... [2022-07-13 13:40:19,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd9cdd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:40:19, skipping insertion in model container [2022-07-13 13:40:19,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:39:02" (2/3) ... [2022-07-13 13:40:19,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd9cdd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:40:19, skipping insertion in model container [2022-07-13 13:40:19,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:40:19" (3/3) ... [2022-07-13 13:40:19,844 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16.c [2022-07-13 13:40:19,853 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:40:19,854 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 13:40:19,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:40:19,995 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@79c6d461, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26261416 [2022-07-13 13:40:19,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 13:40:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 8618 states, 8513 states have (on average 1.850111594032656) internal successors, (15750), 8515 states have internal predecessors, (15750), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-07-13 13:40:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 13:40:20,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:40:20,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:40:20,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:40:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:40:20,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2026736529, now seen corresponding path program 1 times [2022-07-13 13:40:20,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:40:20,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741105212] [2022-07-13 13:40:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:40:20,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:40:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:40:20,519 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 13:40:20,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:40:20,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741105212] [2022-07-13 13:40:20,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741105212] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:40:20,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:40:20,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:40:20,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780220902] [2022-07-13 13:40:20,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:40:20,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:40:20,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:40:20,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:40:20,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:40:20,563 INFO L87 Difference]: Start difference. First operand has 8618 states, 8513 states have (on average 1.850111594032656) internal successors, (15750), 8515 states have internal predecessors, (15750), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13:40:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:40:45,608 INFO L93 Difference]: Finished difference Result 19853 states and 36836 transitions. [2022-07-13 13:40:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:40:45,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2022-07-13 13:40:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:40:45,672 INFO L225 Difference]: With dead ends: 19853 [2022-07-13 13:40:45,672 INFO L226 Difference]: Without dead ends: 11228 [2022-07-13 13:40:45,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:40:45,690 INFO L413 NwaCegarLoop]: 14954 mSDtfsCounter, 3239 mSDsluCounter, 11506 mSDsCounter, 0 mSdLazyCounter, 25181 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3239 SdHoareTripleChecker+Valid, 26460 SdHoareTripleChecker+Invalid, 25804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 25181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:40:45,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3239 Valid, 26460 Invalid, 25804 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [623 Valid, 25181 Invalid, 0 Unknown, 0 Unchecked, 24.4s Time] [2022-07-13 13:40:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11228 states. [2022-07-13 13:40:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11228 to 10284. [2022-07-13 13:40:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10284 states, 10182 states have (on average 1.8511098016106855) internal successors, (18848), 10281 states have internal predecessors, (18848), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:40:45,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10284 states to 10284 states and 18948 transitions. [2022-07-13 13:40:45,940 INFO L78 Accepts]: Start accepts. Automaton has 10284 states and 18948 transitions. Word has length 13 [2022-07-13 13:40:45,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:40:45,940 INFO L495 AbstractCegarLoop]: Abstraction has 10284 states and 18948 transitions. [2022-07-13 13:40:45,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13:40:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 10284 states and 18948 transitions. [2022-07-13 13:40:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 13:40:45,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:40:45,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:40:45,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:40:45,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:40:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:40:45,946 INFO L85 PathProgramCache]: Analyzing trace with hash -93322037, now seen corresponding path program 1 times [2022-07-13 13:40:45,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:40:45,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240256049] [2022-07-13 13:40:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:40:45,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:40:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:40:46,118 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 13:40:46,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:40:46,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240256049] [2022-07-13 13:40:46,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240256049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:40:46,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:40:46,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:40:46,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635670418] [2022-07-13 13:40:46,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:40:46,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:40:46,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:40:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:40:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:40:46,125 INFO L87 Difference]: Start difference. First operand 10284 states and 18948 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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)