./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2018/Problem11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/Problem11.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 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:12:34,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:12:34,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:12:34,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:12:34,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:12:34,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:12:34,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:12:34,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:12:34,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:12:34,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:12:34,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:12:34,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:12:34,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:12:34,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:12:34,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:12:34,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:12:34,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:12:34,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:12:34,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:12:34,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:12:34,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:12:34,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:12:34,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:12:34,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:12:34,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:12:34,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:12:34,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:12:34,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:12:34,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:12:34,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:12:34,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:12:34,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:12:34,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:12:34,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:12:34,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:12:34,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:12:34,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:12:34,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:12:34,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:12:34,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:12:34,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:12:34,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:12:34,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:12:34,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:12:34,780 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:12:34,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:12:34,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:12:34,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:12:34,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:12:34,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:12:34,782 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:12:34,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:12:34,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:12:34,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:12:34,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:12:34,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:12:34,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:12:34,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:12:34,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:12:34,785 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:12:34,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:12:34,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:12:34,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:12:34,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:12:34,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:12:34,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:12:34,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:12:34,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:12:34,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:12:34,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:12:34,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:12:34,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:12:34,788 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:12:34,788 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:12:34,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:12:34,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:12:34,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e [2021-12-15 23:12:34,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:12:35,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:12:35,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:12:35,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:12:35,020 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:12:35,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2018/Problem11.c [2021-12-15 23:12:35,086 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b26f5b5c0/4e37a772dfe74b24844e96934f93c875/FLAGc02cf9777 [2021-12-15 23:12:35,682 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:12:35,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem11.c [2021-12-15 23:12:35,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b26f5b5c0/4e37a772dfe74b24844e96934f93c875/FLAGc02cf9777 [2021-12-15 23:12:36,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b26f5b5c0/4e37a772dfe74b24844e96934f93c875 [2021-12-15 23:12:36,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:12:36,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:12:36,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:12:36,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:12:36,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:12:36,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:12:36" (1/1) ... [2021-12-15 23:12:36,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fc45a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:36, skipping insertion in model container [2021-12-15 23:12:36,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:12:36" (1/1) ... [2021-12-15 23:12:36,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:12:36,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:12:36,336 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/Problem11.c[778,791] [2021-12-15 23:12:36,341 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/Problem11.c[817,830] [2021-12-15 23:12:36,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:12:36,885 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:12:36,896 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/Problem11.c[778,791] [2021-12-15 23:12:36,897 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/Problem11.c[817,830] [2021-12-15 23:12:37,053 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:12:37,113 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:12:37,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37 WrapperNode [2021-12-15 23:12:37,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:12:37,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:12:37,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:12:37,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:12:37,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37" (1/1) ... [2021-12-15 23:12:37,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37" (1/1) ... [2021-12-15 23:12:37,350 INFO L137 Inliner]: procedures = 286, calls = 252, calls flagged for inlining = 148, calls inlined = 148, statements flattened = 2260 [2021-12-15 23:12:37,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:12:37,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:12:37,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:12:37,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:12:37,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37" (1/1) ... [2021-12-15 23:12:37,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37" (1/1) ... [2021-12-15 23:12:37,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37" (1/1) ... [2021-12-15 23:12:37,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37" (1/1) ... [2021-12-15 23:12:37,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37" (1/1) ... [2021-12-15 23:12:37,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37" (1/1) ... [2021-12-15 23:12:37,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37" (1/1) ... [2021-12-15 23:12:37,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:12:37,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:12:37,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:12:37,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:12:37,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37" (1/1) ... [2021-12-15 23:12:37,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:12:37,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:12:37,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 23:12:37,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 23:12:37,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:12:37,670 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2021-12-15 23:12:37,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2021-12-15 23:12:37,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2021-12-15 23:12:37,671 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2021-12-15 23:12:37,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:12:37,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:12:37,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:12:37,858 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:12:37,859 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:13:27,080 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:13:27,092 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:13:27,092 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:13:27,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:13:27 BoogieIcfgContainer [2021-12-15 23:13:27,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:13:27,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:13:27,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:13:27,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:13:27,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:12:36" (1/3) ... [2021-12-15 23:13:27,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3013f583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:13:27, skipping insertion in model container [2021-12-15 23:13:27,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:37" (2/3) ... [2021-12-15 23:13:27,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3013f583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:13:27, skipping insertion in model container [2021-12-15 23:13:27,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:13:27" (3/3) ... [2021-12-15 23:13:27,101 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11.c [2021-12-15 23:13:27,105 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:13:27,106 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 23:13:27,145 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:13:27,151 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:13:27,151 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 23:13:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 705 states, 600 states have (on average 1.5866666666666667) internal successors, (952), 602 states have internal predecessors, (952), 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) [2021-12-15 23:13:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 23:13:27,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:13:27,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:13:27,198 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:13:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:13:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash -295136918, now seen corresponding path program 1 times [2021-12-15 23:13:27,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:13:27,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547876739] [2021-12-15 23:13:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:13:27,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:13:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:13:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:13:27,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:13:27,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547876739] [2021-12-15 23:13:27,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547876739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:13:27,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:13:27,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:13:27,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123495582] [2021-12-15 23:13:27,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:13:27,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:13:27,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:13:27,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:13:27,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:13:27,636 INFO L87 Difference]: Start difference. First operand has 705 states, 600 states have (on average 1.5866666666666667) internal successors, (952), 602 states have internal predecessors, (952), 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 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2021-12-15 23:13:36,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-15 23:13:38,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-15 23:13:41,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-15 23:13:45,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-15 23:13:47,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-15 23:13:50,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []